By Donovan Burns, Astoria High School Junior, GEMM Lab summer intern
The term zooplankton is used to describe a large number of creatures; the exact definition is any animal that cannot move against a sustained current in the marine environment. There are two main types of plankton: holoplankton and meroplankton. Meroplankton are organisms that are plankton for only part of their life cycle. So this makes most sea creatures plankton, for instance, salmon, sunfish, tuna, and most other fish are meroplankton because they start out their lives as plankton. Holoplankton are plankton that remain plankton for their whole lives, these include mysid shrimp, most marine worms, and most jellyfish.
I have spent a good deal of time this summer looking through a microscope at the zooplankton we have captured during sampling from our research kayak, trying to distinguish and identify different species. Telsons, the tail of the tail, are what we use to identify different types of mysid shrimp, which are a primary gray whale prey item along the Oregon coast and the most predominant type of zooplankton we capture in our sampling. For instance Neomysis is a genus of mysid shrimp and is one of the two most abundant zooplankton species we get. Their telsons end with two spikes that are somewhat longer than the spikes on the side of the telson. This look is distinct from Holmesimysis sculpta, the other of the two most abundant zooplankton species we get, which have four-pronged telsons with varying sizes of spikes along the sides of the telson. Alienacanthomysis macropsis is identified by both their long eye stalks and their rather bland rounded telson.
However, creatures that are not mysid shrimp cannot be identified this way. Like gammarids, they look like fleas. We have only found one kind of gammarid here in Port Orford this year, Atylus tridens. There are other types but that is the only type we have found this year. After that, we have Caprellidae, also known as skeleton shrimp. They are long and stalky, and have claws in every spot where they could have claws.
Then there are copepods. Copepods are tiny and have long antennae that string down to the sides of their bodies. We also have been seeing lots of crab larvae. I have also seen a couple of polychaete worms, which are marine worms with many legs and segments. The only reason I was able to identify them as polychaetes is due to my marine biology class at Astoria High School where we identified these worms using microscopes before.
We also have had some trouble identifying somethings. For instance, we have found a few individuals of a type of mysid shrimp with a rake-like tail that we are still trying to identify. Also, we have captured some jellyfish that we are not trying to identify. When the kayak team gets back in from gathering samples, we freeze the samples to kill and preserve the critters in them. This process turns the jellyfish to mush, so they are hard to identify.
To identify these zooplankton and other critters, we put them into a Petri dish and under a dissection scope, at which point we use forceps to move and pivot creatures. If a jellyfish had just eaten another plankton, we have to cut it open to get the plankton out so we can identify it.
Sometimes we have large samples of thousands of the same creature, in this case, we would normally sub-sample it. Sub-sampling is when we take a portion of a sample and identify and count individual zooplankton in that sub-sample. Then we multiply those counts by the portion of the whole sample to get the approximate total number that are in that sample. For instance, say we had a rather large sample, we would take a tenth of that sample and count what is in it. Say we count 500 individuals in that tenth. We would then multiply 500 by ten to get the total number in that whole sample.
Then there are some plankton that we do not catch, like large jellyfish. The kayak team has gotten photos of a giant jellyfish that was nearly a meter long.
All in all, Port Orford has an amazing and diverse population of marine life. From gray whales to thresher sharks to mysid shrimp to copepods to jellyfish, this little ecosystem has pretty much some of everything.
By Anthony Howe, Astoria High School graduate 2019, GEMM Lab summer intern
Murphy’s Law says that “things will go wrong in any given situation if you give them a chance”. This statement certainly applies to research where you never really know what is going to happen when performing fieldwork. You can only try to be prepared for all of the situations. When I arrived at the Oregon State University (OSU) Field Station in Port Orford, I had no idea that it would harbor some of the best educational experiences I have ever had. I had no idea what a theodolite was, nor did I know how to kayak in the ocean, but I learned fast. When we first started being trained on using a theodolite and the program that processes the data, Pythagoras, we had some problems. The theodolite would not stay level, but just as we were learning how to work the theodolite, we also learned how to work as a team. When we finally managed to level the theodolite, which did take a few days, I began to realize the hard work of doing fieldwork. You can be prepared but there will always be something that goes wrong, and that’s okay. I have learned that mistakes happen and cannot be dwelled on. Only learned from. No one is perfect.
Just two days ago I was on our tandem research kayak with Mia Arvizu, the OSU Marine Studies Initiative (MSI) undergraduate intern. When we go out on the kayak, we paddle around our study area and go to GPS-marked “stations” to collect prey samples of zooplankton, test for water visibility using a Secchi disk, and send a GoPro underwater to have a better understanding of what is going on under the surface. While sampling at Station 15 in Mill Rocks I lowered the GoPro into the water using a downrigger. When the GoPro reached the bottom, I began to pull it up, only to realize it had gotten snagged in a crevice. I gave the line to which the GoPro is attached some slack and began to give Mia instructions to move to different spots to try and retrieve the GoPro out of this tight crevice. Unfortunately, I did not realize all of the lines had wrapped themselves underneath the downrigger and as soon as a swell came up, the line broke. My eyes widened as I realized what had just happened. Thankfully, I managed to grasp the last of the remaining line left connected to the GoPro and pulled it back into the kayak using my hand wrapped in a towel since the line is thin and can cut into your hands easily. Only then did I realize that neither Mia nor I had packed a knife in the event we needed to cut a line. We sat and pondered ideas of how to cut the last of the line so that I could reattach the GoPro to the downrigger. Mia came up with the idea to use a barnacle or a mussel, and it worked perfectly. We were proud of ourselves for being resourceful and using nature to our advantage. But as soon as I finished using the mussel to cut the line, Lisa’s voice came over the VHF radio that we always carry with us in the kayak that there were scissors in the First Aid Kit that is stowed in the dry hatch of the kayak. Mia and I looked at each other and could only laugh. The kayak team can be rough at times but it’s made up by the fact that we get beautiful prey samples and stunning GoPro videos of what is below the water.
After all of the kayak sampling is done we organize and store our gear, and then go to the lab. In the lab, one person will clean all tools and devices touched by saltwater while the other sieves all of our zooplankton samples. Each sample is individually sieved and then placed in a sample jar with its station name on it and placed into the freezer. We put them in the freezer to increase the longevity of the samples, as well as euthanizing all zooplankton so that they are easier to identify under a dissection scope. After all of that is done we take a 45-minute break before taking over the cliff team job so they can have a lunch break, as well as a rest from staring at the glare of the water all day searching for whales.
The cliff team generally consists of two people. One person will be on the theodolite, and the other will be on the laptop. The idea is that the theodolite uses the Pythagorean Theorem to get the exact coordinates of the whale we are spotting. This allows us to track exactly where the whales are going, what they are doing, how they’re doing it, and the fashion in which they’re doing it. The fixed points will fall on a plotted map on the laptop. The other job of the person on the laptop is to take pictures when possible so we can identify the whales. For instance, there is a whale named Buttons that has been recorded during past summers in Port Orford. By using the photos we take of a whale, combined with previous data about the whale named Buttons, we can cross-reference the body color and patterns of the whale to be able to re-identify Buttons. We now know that we have seen Buttons for 4 consecutive days feeding in our study area. The camera also acts as a tool to take pictures of whales not just for identity but for rare activity. Today while on the cliff Mia and I spotted a whale in Tichenor Cove (one of our sampling sites) that breached four times! These experiences are rare and beautiful. You never think about how big a whale truly is until you see it almost completely leap out of the water – it is beautiful.
I’m sure more mistakes will be made but that’s okay. I have many more experiences to witness, and many more memories to make from this internship, as well as challenges. I couldn’t be more than happy with the team I have to share all of these learning experiences and hardships with.
By Lisa Hildebrand, MSc student, OSU Department of Fisheries and Wildlife, Geospatial Ecology of Marine Megafauna Lab
It seems unfathomable to me that one year and two months ago I had never used a theodolite before, never been in an ocean kayak before, never identified zooplankton before, never seen a Time-Depth-Recorder (TDR) before. Now, one year later, it seems like all of those tools, techniques and things are just a couple of old friends with which I am being reunited with again. My second field season as the project team lead of the gray whale foraging ecology project in Port Orford (PO) is slowly getting underway and so many of the lessons I learned from my first field season last year have already helped me tremendously this year. I know how to interpret weather forecasts and determine whether it will be a kayak-appropriate day. I know how to figure out the quirks of Pythagoras, the program we use to interface with our theodolite which helps us track whales from our cliff site. I know how to keep track of a budget and feed a team of hungry researchers after a long day of work. Knowing all of these things ahead of this year’s field season have made me feel a little more prepared and at ease with the training of my team and the work to be done. Nevertheless, there are always new curveballs to be thrown my way and while they can often be frustrating, I enjoy the challenges that being a team leader has to offer as it allows me to continue to grow as a field research scientist.
2019 marks the fifth year that this project has been taking place in PO. Back in the summer of 2015, former GEMM Lab Master’s student Florence Sullivan started this project together with Leigh. That year the research focused more on investigating vessel disturbance to gray whales by comparing sites of heavy (Boiler Bay) to low boat traffic (Port Orford). The effort found that there were significant differences in gray whale activity budgets between the heavy and low boat traffic conditions (Sullivan & Torres 2018). The following year, the focus of the research switched to being more on the foraging ecology side of things and the project was based solely out of Port Orford, as it continues to be to this day. Being in our fifth year means that we are starting to build a humbly-sized database of sightings across multiple years allowing me to investigate potential individual specialization of the whales that we document. Similarly, multiple years of prey sampling is starting to reveal temporal and spatial trends of prey community assemblages.
It has become a tradition to come up with a name for the field team that spends 6 weeks at the Oregon State University (OSU) Port Orford Field Station to collect the data for the project. It started with Team Ro“buff”stus in 2015, which I believe carried through until 2017. This is understandable since it’s such a clever name. It’s a play on the species name for gray whales, robustus, but the word “Buff” has been substituted in the center. Buffs are pieces of cloth sewn into a cylindrical shape, often with fun patterns or colors, that can be used as face masks, headbands, and scarves, which come in very handy when your face is exposed to the elements. Doing this project, we can be confronted by wind, sun, fog and sea water all in one day, so Buffs have definitely served the team members very well over the years. Last year, as the project’s torch was passed from Florence to myself, I felt a new team name was apt, and so last year’s team decided our name would be Team Whale Storm. I believe it was because we said we would take the whale world by storm with our insanely good theodolite tracking and kayak sampling skills. With a new year and new team upon us, a new team name was in order. As the title of this blog post indicates, this year the team is called Crew Cinco. The reason behind this name is that we are the fifth team to carry out this field work. Since the gray whales breed in the lagoons of Baja California, Mexico, I like to think that their native language is Spanish. Hence, we have decided that instead of being Crew Five, we are Crew Cinco, as cinco is the Spanish word for five (besides, alliteration makes for a much better team name).
Now that you are up to speed on the history of the PO gray whale project, let me tell you a little about who is part of Crew Cinco and what we have been up to already.
This year’s Marine Studies Initiative OSU undergraduate intern is Mia Arvizu. Mia has just finished her sophomore year at OSU and majors in Environmental Science. Besides being my co-captain this year in the field, Mia is also undertaking an independent research project which focuses on the relationship between sea urchin abundance, kelp health and gray whale foraging. She will tell you all about this project in a few weeks when she takes over the GEMM lab blog. Aside from her interest in ecology and the way science can be used to help local communities in a changing environment, Mia is a dancer, having performed in several dances in OSU’s annual luau this year, and she is currently teaching herself Spanish and Hawaiian.
Both of our high school interns this year are from Astoria. Anthony Howe has just graduated from Astoria High School and will be starting at Clatsop Community College in the fall. His plan is to transfer to OSU and to pursue his interest in marine biology. Anthony, like myself, was born in Germany and lived there until he was six, which means that he is able to speak fluent German. He also introduced the team to the wonders of the Instant Pot, which has made cooking for a team of four hungry scientists much simpler.
Donovan Burns is our other high school intern. He will be going into his junior year in the fall. Donovan never ceases to amaze us with the seemingly endless amounts of general knowledge he has, often sharing facts about Astoria’s history to Asimov’s Laws of Robotics to pickling vegetables, specifically carrots, with us during dinner or while scanning for whales on the cliff site. He also named the first whale we saw here this season – Speckles.
Crew Cinco has already been in PO for two weeks now. After having a full team meeting with Leigh in Newport and a GEMM lab summer pizza party, we headed south to begin our 6-week field season. It’s hard to believe that the two training weeks are already over. The team worked hard to figure out the subtleties of the theodolite, observe different gray whales and start to understand their dive and foraging patterns, undertake a kayak paddle & safety course, as well as CPR and First Aid training, learn about data processing and management, and how to use a variety of gizmos to aid us in data collection. But it hasn’t all been work. We enjoyed a day in the Californian Redwoods on one of our day’s off and picked blueberries at the Twin Creek Ranch, stocking our freezer with several bags of juicy berries. We have played ‘Sorry!’ perhaps one too many times already (we are in desperate need of some more boardgames if anyone wants to send some our way to the field station!), and enjoyed many walks and runs on beautiful Battle Rock Beach.
The next four weeks will not be easy – very early mornings, lots of paddling and squinting into the sun, followed by several hours in the lab processing samples and backing up data. But the next four weeks will also be extremely rewarding – learning lots of new skills that will be valuable beyond this 6-week period, revealing ecological trends and relationships, and ultimately (the true reason for why Mia, Anthony, Donovan and myself are more than happy to put in 6 weeks-worth of hard work), the chance to see whales every day up close and personal. Follow Crew Cinco’s journey over the next few weeks as my interns will be posting to the blog for the next three weeks!
Sullivan, F.A., & Torres L.G. Assessment of vessel disturbance to gray whales to inform sustainable ecotourism. Journal of Wildlife Management, 2018. 82: 896-905.
By Lisa Hildebrand, MSc student, OSU Department of Fisheries and Wildlife, Geospatial Ecology of Marine Megafauna Lab
Every season, or significant period of time, usually has a distinct event that marks its beginning. For example, even though winter officially begins when the winter solstice occurs sometime between December 20 and December 23, many people often associate the first snowfall as the real start of winter. To mark the beginning of schooling, when children start 1stgrade in Germany (which is where I’m from), they receive something called a “Zuckertüte”, which translated means “sugar bag”. It is a large (sometimes as large as the child) cone-shaped container made of cardboard filled with toys, chocolates, sweets, school supplies and various other treats topped with a large bow.
I still remember (and even have) mine – it was almost as tall as I was, had a large Barbie printed on it (and a real one sitting on top of it) and was bright pink. And of course, while at a movie theatre, once the lights dim completely and the curtain surrounding the screen opens just a little further, members of the audience stop chit-chatting or sending text messages, everyone quietens down and puts their devices away – the film is about to start. There are hundreds upon thousands of examples like these – moments, events, days that mark the start of something.
In the past, the beginning of summer has always been tied to two things for me: the end of school and the chance to be outside in the sun for many hours and days. This reality has changed slightly since moving to Oregon. While I don’t technically have any classes during the summer, the work definitely won’t stop. There are still dozens of papers to read, samples to run in the lab, and data points to plot. For anyone from Oregon or the Pacific Northwest (PNW), it’s pretty well known that the weather can be a little unpredictable and variable, meaning that summer might not always be filled with sunny days. Despite somewhat losing these two “summer markers”, I have found a new event to mark the beginning of summer – the arrival of the gray whales.
It’s official – the gray whale field season is upon us! As many of you may already know, the GEMM Lab has two active gray whale research projects: investigating the impacts of ocean noise on gray whale physiology and exploring potential individual foraging specialization among the Pacific Coast Feeding Group (PCFG) gray whales. Both projects involve field work, with the former operating out of Newport and the latter taking place in Port Orford, both collecting photographs and a variety of samples and tracklines to study the PCFG, which is a sub-group of the larger Eastern North Pacific (ENP) population. June 1st is the widely accepted “cut-off date” for the PCFG whales, whereby gray whales seen after June 1st along the PNW coastline (specifically northern California, Oregon, Washington and British Columbia) are considered members of the PCFG. While this date is not the only qualifying factor for an individual to be considered a PCFG member, it is a good general rule of thumb. Since last week happened to be the first week of June, PI Leigh Torres, field technician Todd Chandler and myself launched out onto the Pacific Ocean in our trusty RHIB Ruby twice looking for gray whales, and it sure was a successful start to the season!
Even though I have done small boat-based field work before, every project and field team operates a little differently, which is why I was a little nervous at first. There are a lot of components to the Newport-based project as Leigh & co. assess gray whale physiology by collecting fecal samples, drone imagery and taking photographs, observing behavior patterns, as well as assessing local prey through GoPro footage and light traps. I wasn’t worried about the prey components of the research, since there is plenty of prey sampling involved in my Port Orford research, however I was worried about the whale side of things. I wasn’t sure whether I would be able to catch the drone as it returned back home to Ruby, fearing I might fumble and let it slip through my fingers. I also experienced slight déjà vu when handling the net we use to collect the fecal samples as I was forced to think back to some previous field work that involved collecting a biopsy dart with a net as well. During that project, I had somehow managed to get the end of the net stuck in the back of the boat and as I tried to scoop up the biopsy dart with the net-end, the pole became more and more stuck while the water kept dragging the net-end down and eventually the pole ended up snapping in my hands. On top of all this anxiety and work, trying to find your footing in a small RHIB like Ruby packed with lots of gear and a good amount of swell doesn’t make any of those tasks any easier.
However, as it turned out, none of my fears came to fruition. As soon as Todd fired up Ruby’s engine and we whizzed out and under the Newport bridge, I felt exhilarated. I love field work and was so excited to be out on the water again. During the two days I was able to observe multiple individuals of a species of whale that I find unique and fascinating.
I felt back in my natural element and working with Leigh and Todd was rewarding and fun, as I have so much to learn from their years of experience and natural talent in the field dealing with stressful situations and juggling multiple components and gear. Even though I wasn’t out there collecting data for my own project, some of my observations did get me thinking about what I hope to focus on in my thesis – individualization. It is always interesting to see how differently whales will behave, whether due to the substrate we find them over, the water depths we find them in, or what their surfacing patterns are like. Although I still have six weeks to go until my field season starts and feel lucky to have the opportunity to help Leigh and Todd with the Newport field work, I am already looking forward to getting down to Port Orford in mid-July and starting the fifth consecutive gray whale field season down there.
But back to Newport – over the course of two days, we were able to deploy and retrieve one light trap to collect zooplankton, collect two fecal samples, perform two GoPro drops, fly the drone three times, and take hundreds of photos of whales. Leigh and Todd were both glad to be reunited with an old friend while I felt lucky to be able to meet such a famous lady – Scarback. A whale with a long sighting history not just for the GEMM Lab but for various researchers along the coast that study this population. Scarback is well-known (and easily identified) by the large concave injury on her back that is covered in whale lice, or cyamids. While there are stories about how Scarback’s wound came to be, it is not known for sure how she was injured. However, what researchers do know is that the wound has not stopped this female from reproducing and successfully raising several calves over her lifetime. After hearing her story from Leigh, I wasn’t surprised that both she and Todd were so thrilled to get both a fecal sample and a drone flight from her early in the season. The two days weren’t all rosy; most of day 1 was shrouded in a cloud of mist resulting in a thin but continuous layer of moisture forming on our clothes, while on day 2 we battled with some pretty big swells (up to 6 feet tall) and in typical Oregon coast style we were victims of a sudden downpour for about 10 minutes. We had some excellent sightings and some not-so-excellent sightings. Sightings where we had four whales surrounding our boat at the same time and sightings where we couldn’t re-locate a whale that had popped up right next to us. It happens.
Field work is certainly one of my favorite things in the world. The smell of the salt, the rustling of cereal bar wrappers, the whipping of hair, the perpetual rosy noses and cheeks no matter how many times you apply and re-apply sunscreen, the awkward hilarity of clambering onto the back of the boat where the engine is housed to take a potty break, the whooshing sound of a blow, the sometimes gentle and sometimes aggressive rocking of the boat, the realization that you haven’t had water in four hours only to chug half of your water in a few seconds, the waft of peanut butter and jelly sandwiches, the circular footprint where a whale has just gracefully dipped beneath the surface slipping away from view. I don’t think I will ever tire of any of those things.
By Lisa Hildebrand, MSc student, OSU Department of Fisheries and Wildlife, Geospatial Ecology of Marine Megafauna Lab
In our most recent lab meeting, the GEMM lab discussed a recent paper about how blue whale migrations may be driven by memory and resource tracking (Abrahms et al. 2019). Most of our discussion was about the choices made by the authors in terms of their analyses used and the figures produced, as Leigh always pushes us graduate students to think critically about the scientific papers we read. However, a portion of our discussion focused less on the actual science behind the paper, but more on the language used. This change in direction was initiated by myself as I mentioned how much I liked the phrase “goldilocks zone”, which the authors used to describe an area between 15-17ºC that blue whales tended to occupy for the majority of the annual migration cycle.
What I liked so much about using this phrase was that the authors were using a childhood fairy tale that probably every 5-year old kid knows of to explain some pretty complex science and analysis. Our team then proceeded to go down a rabbit-hole for
a few minutes where we discussed uses of creative words in scientific writing. Although during our meeting we got back on track quite quickly, my mind has still continued down this rabbit-hole for quite some time. I started to wonder about the origins of scientific publication, when and why the structure and style of writing became so rigid, and when and why authors have decided to become a little more creative or colloquial in their writing since then. So, sit back and delve into the history of scientific writing with me…
Humankind has made scientific observations for thousands of years. Perhaps the earliest known culture to have done this are the Mesopotamian peoples who recorded observations of their surroundings around 3,500 BC in Sumer, which is now known as Iraq (Rochberg 2004). Most of the observations relate to astronomy, however there is some evidence to suggest that the Mesopotamians had recognized the existence of Pythagorean triplets (3, 4, 5; 5, 12, 13), long before Pythagoras himself was alive (Hoffman 1999).
However, formal publication of scientific observations is still a relatively new occurrence compared to when the Mesopotamians first started to note down their observations since such documentation of science first occurred in 1665. Interestingly, the birth of scientific publication was achieved by not one journal, but two; Journal des Sçavans in France and Philosophical Transactions of the Royal Society in London. Even though Journal des Sçavans beat out Philosophical Transactions of the Royal Society by publishing its first journal two months before the other, it ultimately lost the fight since it ceased publication in 1792, whereas Philosophical Transactions of the Royal Society is still in print, making it the world’s longest running scientific journal.
Early publications were descriptive by nature. Instead of planning experiments, carrying them out, detailing results and interpreting them, authors described observations they made about their surroundings. An example is by a certain Mr. R.W. S.R.S from 1693. The opening lines of his publication entitled ‘Some Observations in the Dissection of a Ratt’ are as follows:
“The fore-feet of a Rat resemble those of the Castor. The Hair is also some fine, some course; as in that Animal. The Tail scaly, with Hairs between every Scale, like the Castors, which shews these two Animals to be something akin; and indeed the Water-Rat comes very near to the Beaver, and makes it’s Holes in the bank-sides of Ponds after the same manner.”
While not all publications were as purely descriptive as this example, those that did undertake experiments discussed them in a very chronological and almost basic manner. An example is by Allen Moulen in his publication ‘Some experiments on a black shining sand brought from Virginia, suppos’d to contain iron, made in March 1689’. An excerpt of the paper is as follows:
“6. I flux’d another parcel of it with Salt-Peter and Flowers of Brimstone, without being able to procure any Regulus. 7. I pour’d good Spirit of Salt on a parcel of this Sand, but could observe no Luctation thereby produc’d. 8. I pour’d Spirit of Nitre both strong and weakned with Water on parcels of the same Sand, without being able to discover any Conflict.”
Publications continued to be written in this nature for quite some time, however by the second half of the 19th century, science and the publication thereof distinctly changed and a lot of this can be credited to Louis Pasteur.
When Pasteur first had breakthroughs that provided evidence for the germ theory of disease, he was met by a lot of criticism by fellow scientists that were firm believers in the theory of spontaneous generation. As a way to prove that he was right, Pasteur started to document his experiments in extreme detail. This situation and Pasteur’s recognition of the importance of methodology resulted in the idea of reproducibility and essentially in the IMRaD structure we still follow today.
IMRaD stands for Introduction, Methods, Results and Discussion, which for scientists nowadays is probably as comforting as a cuddly blanket or a hot chocolate on a cold day. We find comfort in this structure because in a way it makes writing scientific papers less daunting because it tells us exactly what we need to do. It’s like a checklist with boxes that we can neatly tick off as we fill in the details of each section.
While IMRaD was first initiated during Pasteur’s era, it became widely adopted in the late 1950s when there was a strong boost in scientific output as more money was being funneled to the sciences. The result of this boost was strong pressure on scientific journals and their editors as authors were submitting papers at a never before seen rate. In an effort to keep up with the influx of submissions, editors felt the need to become more stringent and so enforced strict rules on article length, organization and structure, in order to weed out papers that didn’t make the cut right off the bat. This included IMRaD becoming more widely used in journals as a way to bring conformity to the sciences. This resulted in strong pressure on authors to be concise in their writing, which means that there isn’t much room for creativity.
The topic of creativity in scientific writing has long been debated and many suggest that the writing style in publications should be as objective and frank as possible in order to avoid masking the science (Massoudi 2003). However, it has also been suggested by many that by limiting the creativity in scientific writing, you might actually be limiting the creativity going into the scientific process (Bohm & Peat 1987). While I do believe that objectivity and clarity in scientific writing is important, I do not see the harm in authors trying to be a little creative in the communication of their work. Sir Peter Medawar, a Nobel Prize winning biologist summed up this sentiment very nicely in his book ‘Advice to a Young Scientist’ published in 1979:
“Scientists are people of very dissimilar temperaments doing different things in very different ways. Among scientists are collectors, classifiers and compulsive tidier-up; many are detectives by temperament and many are explorers; some are artists and others artisans. There are poet-scientists and philosopher-scientists and even a few mystics. What sort of mind or temperament can all these people be supposed to have in common? Obligative scientist must be very rare, and most people who are in fact scientists could easily have been something else instead.”
I don’t know whether there is a right or a wrong answer on this matter. What I do know though is that I always give an emphatic nod of approval when I see a word not typically seen in scientific writing used creatively in a scientific publication and it often conjures a smile on my face and makes the paper more memorable to me.
It’s interesting to muse about the direction in which scientific writing is heading now. We are still seeing a proliferation in papers that are being submitted and published, and journals being established. However, I think we are starting to see a shift in how strict scientists are in the language that they use for their publications. That is not to say that manuscripts are now submitted filled with colloquialisms, poor grammar and punctuation, but I think there is a certain flexibility in how much creativity can be incorporated into publications. The extent of this flexibility is, I believe, still largely dependent on the journal. Journals that provide very limited word count and space on the page for a publication, like Nature for example, may limit the creative capabilities of authors. However, some of the more “liberal” journals (liberal in terms of length and space), like PLoS ONE, may allow authors to explore their creative writing abilities to a greater extent. In my personal opinion, I would quite like to see more authors take creative risks in their writing.
Abrahms, B., et al., Memory and resource tracking drive blue whale migrations. PNAS, 2019. 116(12): 5582-5587.
Bohm, D., & Peat F.D. Science, Order, and Creativity.1987. Bantam Books, New York City.
Hoffman, P. The Man Who Loved Numbers: The Story of Paul Erdos and the Search for Mathematical Truth. 1999. Hyperion Books, New York City.
Massoudi, M. Can scientific writing be creative? Journal of Science Education and Technology, 2003. 12(2): 115-128.
Medawar, P. Advice to a Young Scientist. 1979. Basic Books, New York City.
Moulen, A. Some experiments on a black shining sand brought from Virginia, suppos’d to contain iron, made in March 1689. By Allen Moulen, M.D. and Fellow of the Royal Society, since dead. Philosophical Transactions of the Royal Society, 1693. 17: doi.org/10.1098/rstl.1693.0009.
Rochberg, F. The Heavenly Writing: Divination, Horoscopy, and Astronomy in Mesopotamian Culture. 2004. Cambridge University Press, Cambridge.
S.R.S., R.W. Some observations in the dissection of a ratt, communicated by Mr. R.W. S.R.S.Philosophical Transactions of the Royal Society, 1693. 17: doi.org/10.1098/rstl.1693.0006.
By Lisa Hildebrand, MSc student, OSU Department of Fisheries and Wildlife, Geospatial Ecology of Marine Megafauna Lab
This past week has been very busy for me as I gave three quite important, yet very different, presentations. The first was on Tuesday at the Pacific High School in Port Orford, near my study site. The aim of the game was recruitment – my quest for two eager local high schoolers to be my interns for this 2019 summer field season has begun (read blogs written by our 2017 HS interns Nathan Malamud and Quince Nye)! I was lucky enough to be given an entire class period to talk to the students and so I hope that the picture I painted of kayaks, gray whales and sun will be enough to entice students to apply to the internship.
The second was a short presentation in one of the classes I took this term, GEOG 561: GIScience II Analysis and Applications. The class focuses on developing and conducting geospatial analyses in R and throughout the term each student develops a small independent research project using some of their own data. For my research project, I decided to do a small cluster analysis of the zooplankton community data that we have collected from the kayak net samples.
The third and final presentation of the week happened on Thursday and marked one of the big milestones on my Master’s journey: my research review. The research review is a mandatory (and extremely helpful) process in the Department of Fisheries & Wildlife where the student (in this case me), the committee (Dr Leigh Torres, Dr Rachael Orben, Dr Kim Bernard and Dr Susanne Brander) and a department representative (Dr Brian Sidlauskas) all assemble to discuss the student’s research proposal, which lays out the intended work, chapters, analysis and timeline for the students’ thesis. My proposal (which currently bears the title: “Tonight’s specials include mysids, gammarids and more: An examination of the zooplankton prey of Oregon gray whales and its impact on individual foraging patterns”) proposes a two-chapter thesis where the first examines the quality of zooplankton prey, while the second looks at potential individual foraging specialization of gray whales along the Oregon coast. While my entire committee agreed that what I have set forth to do in the next two or so years is ambitious, they provided me with excellent feedback and confidence that I would be able to achieve what I have planned.
Now that it’s the weekend and I’ve had some time to sit back and think about the week, I realized one major commonality between all three presentations I gave. None of the Powerpoints featured more than one image of a gray whale. How could this be?! It is after all my study species and I spend so much of my summer looking at them – how could it be that so little of what I showed and talked about was the thing that I am most passionate about and is so central to my research?
In the course of doing research, it’s easy to get wound up in the nitty gritty and forget about the big picture. While the nitty gritty is also imperative to conducting the research (and ultimately getting results), I sometimes forget about why I do what I do, which is that gray whales are AWESOME. Looking into the past, it seems that some of my lab mates have had the same realizations about their study species before too: see here and here. So for this blog, I want to bring it back to basics and share some of the things that I think are most fascinating about gray whales.
Gray whales are the only baleen whale that feeds benthically. This behavior is facilitated by the shorter and tougher baleen that gray whales possess in comparison to other baleen whale species (Pivorunas 1979). The majority of the Eastern North Pacific (ENP) gray whale population feeds benthically in the Bering Sea where they eat ampeliscid amphipods, which are a type of benthic invertebrates (Nerini 1984). It is estimated that gray whales must regain 11-29% of critical body mass during the feeding season (Villegas-Amtmann et al. 2015) in order to obtain the energy stores they require for the entire year. Besides the personal benefit of sea floor foraging, by using this feeding tactic gray whales create depressions in the soft sediment that benefit other species besides themselves. The highly disruptive nature of this action can increase the biodiversity of the seafloor and initiate scavenging events by lysiannassid amphipods on other infauna (Oliver & Slattery 1985). Furthermore, Grebmeier & Harrison (1992) documented that a variety of seabirds including northern fulmars, black-legged kittiwakes and thick-billed murres feed on benthic amphipods brought to the surface by this unique foraging behavior performed by gray whales.
Gray whales are essentially acrobats. A preference for benthic prey goes hand in hand with a preference for shallow, coastal waters, as for example Pacific Coast Feeding Group gray whales tend to forage within the 5-15 m depth range (Weller et al. 1999). With female adults ranging between 13-15 m in length (females tend to be slightly larger than adult males) and weighing anywhere between 15-33 tons (Jones et al. 1984), I am continuously fascinated by how gracefully and slowly gray whales can navigate extremely shallow waters.
However, it is more than just simple navigation – the behaviors and moves that some gray whales display while in the shallows is phenomenal too. Last year Torres et al. (2018) documented this agility through unmanned aerial systems (UAS) footage that provided evidence for some novel foraging tactics including headstands, side-swimming, and jaw snapping and flexing.
They sure are resilient. Commercial whaling of gray whales began in 1846 after two commercial whaling vessels first discovered the winter breeding grounds in Baja California, Mexico (Henderson 1984). Following this discovery, the ENP were targeted for roughly a century before receiving full protection under the International Convention for the Regulation of Whaling in 1946 (Reeves 1984). Through genetic analyses, it has been estimated that the pre-whaling abundance of the ENP population was between 76,000 – 118,000 individuals (Alter et al. 2012), which is roughly three to five times larger than current estimates (24,000 – 26,000; Scordino et al. 2018). While the gray whale populations that once existed in the Atlantic Ocean were not as fortunate as those in the Pacific (Atlantic gray whales were declared extinct in the 18thcentury due to extensive whaling; Bryant 1995), the ENP has definitely made a strong comeback. Additionally, gray whale resilience is not only evident on this long temporal scale but it can also be seen annually when gray whale mothers fight relentlessly to keep their calves alive when under attack from killer whales. A study on predation of gray whales by transient killer whales in Alaska reported that attacks were quickly abandoned if calves were aggressively defended by their mothers or if gray whales succeeded in reaching depths of 3 m or less (Barrett-Lennard et al. 2011).
For some unimaginable reason, gray whales appear to feel a strong connection to us. For many, gray whales might be best known for actively seeking out human contact during their breeding season in the Mexican lagoons. I find this actuality particularly interesting because of the bloody history we share with Pacific gray whales.
Those are just some of the things about gray whales that make them so fascinating to me. I look forward to potentially discovering one or two more things that we don’t know about them yet through my research. Even if that doesn’t turn out to be the case, I feel so lucky that I at least get to spend so much time with them during their feeding season here along the Oregon coast.
Alter, E.S., et al., Pre-whaling genetic diversity and population ecology in Eastern Pacific gray whales: Insights from ancient DNA and stable isotopes.PLoS ONE, 2012. doi.org/10.1371/journal.pone.0035039.
Barrett-Lennard, L.G., et al., Predation on gray whales and prolonged feeding on submerged carcasses by transient killer whales at Unimak Island, Alaska. Marine Ecology Progress Series, 2011. 421: 229-241.
Bryant, P.J., Dating remains of gray whales from the Eastern North Atlantic. Journal of Mammalogy, 1995. 76(3): 857-861.
Grebmeier, J.M., & Harrison, N.M., Seabird feeding on benthic amphipods facilitated by gray whale feeding activity in the northern Bering Sea. Marine Ecology Progress Series, 1992. 80: 125-133.
Henderson, D.A., Nineteenth century gray whaling: Grounds, catches and kills, practices and depletion of the whale population.Pages 159-186 inJones, M.L. et al., eds. The gray whale: Eschrichtius robustus, 1984. Academic Press, Orlando.
Jones, M.L., et al., The gray whale: Eschrichtius robustus. 1984. Academic Press, Orlando.
Nerini, M., A review of the gray whale feeding ecology. Pages 423-448 inJones, M.L. et al., eds. The gray whale: Eschrichtius robustus, 1984. Academic Press, Orlando.
Oliver, J.S., & Slattery, P.N., Destruction and obstruction on the sea floor: effects of gray whale feeding.Ecology, 1985. 66: 1965-1975.
Pivorunas, A., The feeding mechanisms of baleen whales.American Scientist, 1979. 67(4): 432-440.
Reeves, R.R., Modern commercial pelagic whaling for gray whales. Pages 187-200 inJones, M.L. et al., eds. The gray whale: Eschrichtius robustus, 1984. Academic Press, Orlando.
Scordino, J., et al., Report of gray whale implementation review coordination call on 5 December 2018.
Torres, L.G., et al., Drone up! Quantifying whale behavior from a new perspective improves observational capacity.Frontiers in Marine Science, 2018. 5: doi:10.3389/fmars.2018.00319.
Villegas-Amtmann, S., et al., A bioenergetics model to evaluate demographic consequences of disturbance in marine mammals applied to gray whales. Ecosphere, 2015. 6(10): 1-19.
Weller, D.W., et al., Gray whale (Eschrichtius robustus) off Sakhalin Island, Russia: Seasonal and annual patterns of occurrence. Marine Mammal Science, 1999. 15(4): 1208-1227.
By Lisa Hildebrand, MSc student, OSU Department of Fisheries and Wildlife, Geospatial Ecology of Marine Megafauna Lab
As I enter my second term at OSU as a Master’s student, the ideas and structure of my thesis are slowly coming together. As of right now, my plan is to have two data chapters: The first chapter will assess the quality of zooplankton prey gray whales have access to along the Oregon coast, by looking at energetic value and microplastic content. I will contemplate about how my results potentially affect gray whale health. The second chapter will investigate fine-scale foraging and space use of gray whales in the Port Orford area to determine whether individual specialisation exists.
When I first started digging into the scientific literature to prepare for writing my thesis proposal (which is still underway but I’m getting close to the end of a first draft…), one sentence that I seemed to stumble across more often than not was “Marine plastics are ubiquitous” or “Plastics have become ubiquitous in the marine environment” or some other, very similar, iteration of that statement (e.g. Machovsky-Capuska et al. 2019; Eriksen et al. 2014; Fendall & Sewell 2009).
Many of the papers I first read were review papers on microplastics that mostly discussed general concepts like dispersal mechanisms, trophic transfer, or how microplastics become degraded. While I often think of review papers as treasure chests, since they neatly and succinctly summarise an often complicated and busy area of research into just a few pages, sometimes the fine-scale detail can go missing. Therefore, when reading these review papers, I wasn’t learning the in depth details about specific studies where microplastics had been detected in a group of individuals, population or species. So I felt the statement “Plastics are ubiquitous” was just a good (and pretty dramatic) opening line for a paper. However, once I delved into the studies on single species, I was overwhelmed by the amount of results that GoogleScholar spit out at me. If you type “microplastics marine” into the search bar, you’ll get about 7,650 results. This amount might not sound like a lot, especially if you compare it to say “gray whale”, which generates 96,600 results. Yet, the microplastic extraction method typically used was only developed in 2004 (Thompson et al. 2004). Hence, in a span of just 15 years, over 7,000 studies have detected microplastics in over 660 marine organisms (Secretariat of the Convention on Biological Diversity 2012) – a fact I find extremely troubling.
Microplastics are most commonly viewed as particles <5 mm in size (though there is some contention on this size classification, e.g. Claessens et al. 2013). Microplastics arise from several sources, including fragmentation of larger plastics by UV photo-degradation, wave action and physical abrasion, loss of pre-production pellets (nurdles) and polystyrene beads from shipping vessels, waste water discharge containing microbeads used in cosmetics and microfibers released during the washing of textiles and run-off from land (Nelms et al. 2018). Their small size makes these persistent particles bioavailable to ingestion by a variety of marine taxa, ranging from small prey organisms such as zooplankton, to large megafauna such as whales.
Zooplankton are at the base of marine food webs and are therefore consumed in large quantities by a large number of consumers. The propensity of zooplankton to feed in surface waters makes them highly susceptible to encountering and ingesting microplastics as this is where these synthetic particles are highly abundant (Botterell et al. 2018). Microplastics have been detected in zooplankton from the Northeast Pacific Ocean (Desforges et al. 2015), northern South China Sea (Sun et al. 2017), and Portuguese coast (Frias et al. 2014). Additionally, there is documented overlap between microplastic and zooplankton occurrence at many more locations (e.g. North Western Mediterranean Sea, Collignon et al. 2012; Baltic Sea, Gorokhova 2015; Arctic Ocean, Lusher et al. 2015a). As microplastics research is still in its relative infancy, the extent to which microplastics are ingested by zooplankton and the consequences of this behaviour are uncertain. Nevertheless, exposure to microplastics could lead to entanglement of particles within feeding appendages and/or block internal organs, which may result in reduced feeding, poor overall health, injury and death (Desforges et al. 2015). Though a lab study has found that microplastics are expelled by zooplankton after ingestion, the gut-retention times varied between species, and there is the potential risk of exposure to toxins that leech off of particles while in the body (Cole et al. 2013; the below video is from the afore-mentioned study showing how plankton eat plastics, which are illuminated in fluorescent green).
The large knowledge gap regarding the health implications indicates a strong need for more laboratory studies that investigate the long-term effects of persistent exposure to microplastics on lower trophic organisms, as well as continued short-term experiments that examine whether different zooplankton species are affected differently, since morphologies and life-histories vary widely.
Let’s take a step back and re-focus our lens onto a marine taxa that is much, much bigger in size than a zooplankton: cetaceans. Plastic debris has been documented in the stomachs of stranded individuals of several cetacean species (See Baulch & Perry 2014 for a review), however findings of microplastics in cetaceans are less common. Since cetaceans consume large amounts of prey a day, up to several tons daily for some baleen whales, the likelihood that they are ingesting microplastics through their prey is relatively high (Nelms et al. 2018). Therefore the low number of reported cases is again likely due to the relative novelty of microplastic detection methods. Despite the paucity of studies, microplastics have been found in a True’s beaked whale (Mesoplodon mirus, Lusher et al. 2015b), a humpback whale (Megaptera novaeangliae, Besseling et al. 2015) and an Indo-Pacific humpback dolphin (Sousa chinensis, Zhu et al. 2018), showing that microplastic ingestion by cetaceans does occur. Whether these individuals actively (i.e. active feeding) or passively (i.e. uptake through prey consumption) consumed the microplastics, or inhaled them at the water-air interface, is unknown. As with zooplankton, the short- and long-term impacts of ingesting microplastics by marine mammals is also unknown, though impacts on survival, feeding and uptake of toxins are all possibilities.
The data collection and analysis I am doing for my thesis will hopefully fill small pockets in these large knowledge gaps. I hope to be able to quantify the extent of microplastic pollution among zooplankton species in nearshore Oregon waters. By comparing samples from several years, months and locations, I will determine whether microplastic loads vary spatially and temporally. Since their abundance and presence have been described as being patchy due to the influence of oceanographic and weather conditions (GESAMP 2016), it would seem reasonable to assume that there will be variation. But, results are a ways away as we have not even started our microplastic extraction techniques, which involves digesting samples in potassium hydroxide solution, incubating them at 50ºC for 48-72 hours, sorting through the dissolved material to identify potential plastics and sending them away for analysis. We first have to work our way through jars upon jars of unopened zooplankton light trap samplesthat need to be sorted by species. I am thankfully joined by undergraduate Robyn Norman who has already assisted this project immensely over the last two years with her zooplankton sorting prowess. So in case anyone wants to come looking for us over the next few weeks, you’ll find both Robyn and me sitting in front of a laminar flow hood in the lab of ecotoxicologist Dr. Susanne Brander, with whom we are collaborating on the microplastics portion of my thesis.
Baulch, S., & Perry, C., Evaluating the impacts of marine debris on cetaceans. Marine Pollution Bulletin, 2014. 80(1-2): 210-221.
Besseling, E., et al., Microplastic in a macro filter feeder: humpback whale Megaptera novaeangliae. Marine Pollution Bulletin, 2015. 95: 248-252.
Botterell, Z.L.R., et al., Bioavailability and effects of microplastics on marine zooplankton: a review. Environmental Pollution, 2018. 245: 98-110.
Claessens, M., et al., New techniques for the detection of microplastics in sediments and field collected organisms. Marine Pollution Bulletin, 2013. 70(1-2): 227-233.
Cole, M., et al., Microplastic ingestion by zooplankton. Environmental Science & Technology, 2013. 47(12): 6646-6655.
Collignon, A., et al., Neustonic microplastic and zooplankton in the North Western Mediterranean Sea. Marine Pollution Bulletin, 2012. 64(4): 861-864.
Desforges, JP.W., et al., Ingestion of microplastics by zooplankton in the Northeast Pacific Ocean. Archives of Environmental Contamination and Toxicology, 2015. 69(3): 320-330.
Eriksen, M., et al., Plastic pollution in the world’s oceans: more than 5 trillion plastic pieces weighing over 250,000 tons afloat at sea. PLoS ONE, 2014. doi.org/10.1371/journal.pone.0111913.
Fendall, L.S., & Sewell, M.A., Contributing to marine pollution by washing your face: microplastics in facial cleansers. Marine Pollution Bulletin, 2009. 58(8): 1225-1228.
Frias, J.P.G.L., et al., Evidence of microplastics in samples of zooplankton from Portuguese coastal waters. Marine Environmental Research, 2014. 95: 89-95.
Gorokhova, E., Screening for microplastic particles in plankton samples: how to integrate marine litter assessment into existing monitoring programs? Marine Pollution Bulletin, 2015. 99(1-2): 271-275.
Lusher, A.L., et al., Microplastics in Arctic polar waters: the first reported values of particles in surface and sub-surface samples. Scientific Reports, 2015a. 5: 14947.
Lusher, A.L., et al., Microplastic and macroplastic ingestion by a deep diving, oceanic cetacean: the True’s beaked whales Mesoplodon mirus. Environmental Pollution, 2015b. 199: 185-191.
Machovsky-Capuska, G.E., et al., A nutritional perspective on plastic ingestion in wildlife. Science of the Total Environment, 2019. 656: 789-796.
Nelms, S.E., et al., Investigating microplastic trophic transfer in marine top predators. Environmental Pollution, 2018. 238: 999-1007.
Secretariat of the Convention on Biological Diversity and the Scientific and Technical Advisory Panel – GEF (2012), Impacts of marine debris on biodiversity: current status and potential solutions. Montreal, Technical Series. 67: 1-61.
Sun, X., et al., Ingestion of microplastics by natural zooplankton groups in the northern South China Sea. Marine Pollution Bulletin, 2017. 115(1-2): 217-224.
Thompson, R.C., et al., Lost at sea: where is all the plastic? Science, 2004. 304(5672): 838.
Zhu, J., et al., Cetaceans and microplastics: First report of microplastic ingestion by a coastal delphinid, Sousa chinensis. Science of the Total Environment, 2018. 659: 649-654.
By Lisa Hildebrand, MSc student, OSU Department of Fisheries and Wildlife, Geospatial Ecology of Marine Megafauna Lab
“Just be yourself!” is a phrase that everyone has probably heard at least once in their lives. The idea of being an individual who is distinctly different from other individuals is a concept that is focal to the society we live in today. While historically it may have been frowned upon to be the “black sheep in the crowd”, nowadays that seems to be the goal.
This quest for uniqueness has resulted in different styles of fashion, speech, profession, interest in art, music, literature, automobile types – the list is endless. The American Psychological Association defines personality as the “individual differences in characteristic patterns of thinking, feeling and behaving”1. So, all of the choices we make on a daily basis shape our behaviour, and our behaviour in turn shapes our personality.
Since personality is something that is so engrained within human society, it isn’t surprising that ecologists have explored this concept among non-humans. Decades of research have resulted in an abundance of literature detailing personality in many different taxa and species, ranging from chimpanzees to mice to ants2. Naturally, the definition of personality for animals differs from that for humans since the assessment of animal thoughts and feelings is still somewhat of a locked box to us. Nevertheless, the behavioural aspect of the two definitions remains consistent whereby animal personality is broadly defined as “consistent variation in behavioural traits between individuals”3.
Although I am an early career marine mammal ecologist finding my footing in this rapidly expanding field, I have a keen interest in teasing apart possible cases of individual specialisation within marine mammal populations. So, before getting straight into the nitty gritty of individual specialisation, it is important for me to take a small step back and consider the concept of specialisation as applied to small subgroups or populations of marine mammals.
Specialisations are mostly related to foraging or feeding behaviour whereby a subgroup of individuals will develop a novel method to locate and capture prey. These behaviours have been reported for several marine mammal species, and are strongly coupled to intra and inter-specific competition with other predators for prey and habitat characteristics. Furthermore, it is posited that factors such as resource benefits (e.g. energy content of prey), prey escape rates, and handling times can be minimised if specialisation for a particular prey type or habitat occurs4.
In Florida Bay, Torres & Read5 documented two distinct foraging strategies employed by two bottlenose dolphin ecotypes. One dolphin ecotype was found to forage using deep diving with erratic surfacings, whereas the second ecotype chose to forage through mud ring feeding and were mostly seen in shallow habitats. The latter ecotype is in fact so adapted to shallow depths that dolphins were typically observed foraging in waters <2 m deep. In this example, the foraging tactics of the two ecotypes are strongly driven by habitat conditions, specifically depth. The video below is aerial footage of bottlenose dolphins performing mud ring feeding.
Such group specialisations have been identified not only in several other bottlenose dolphin populations around the world6,7, but also in other cetacean species, including killer whales (distinct differences in target prey between transients and residents8), Guiana dolphins (mud-plume feeding9), humpback dolphins (strand feeding10), and several others. Noticeable here is that these records concern Odontocete species, which is not surprising since these toothed whales are vastly different to baleen whales in that they often live in structured groups with bonds between individuals sometimes lasting for decades11. Long-term relationships are conducive to developing specialised group hunting strategies as individuals will spend considerable time with one another and the success of obtaining prey depends on the cooperation and coordination of the group.
For baleen whales and other marine mammals, such as pinnipeds, where life history and social organisation is more geared toward a solitary life, examples of group specialisations are relatively rare (with the exception of the well-documented bubble-net feeding exhibited by humpback whales12). While group specialisation may not be as prevalent in Mysticetes, the same problems of inter and intra-specific competition persists among these more solitary species too, which would suggest that individuals should develop their own unique foraging tactics and preferences. Evidence for individualisation is hard to obtain since it requires repeated observations of the same individuals over time with good knowledge of the prey type being consumed and/or the habitat being used to forage in.
Nevertheless, examples do exist. Perhaps the most well-documented case of individualisation within a population for marine mammals is of the sea otter. Estes et al. (2003) describe 10 female sea otters in Monterey Bay that had high inter-individual variation in diet, which they investigated over a scale of 8 years13. Most females specialised on 1-4 types of prey, with marked differences between the diets chosen by each female, despite habitat overlap. This individualisation of diet was not attributable to variation in prey availability; hence, authors concluded that this extreme specialisation occurred to reduce intra-population competition for prey.
Ecologists have historically (and probably still to this day) disagreed on whether individualisation actually matters in the grand scheme of things. There are generally three schools of thought on the matter: (1) individual specialisation is rare and/or weakly influences population dynamics and so is not very important; (2) while individual specialisation does occur and may in fact be commonplace, it does not affect ecological processes at the large population scale; and (3) individual specialisation is widespread and can significantly impact population dynamics and/or ecosystem function.
As you might have guessed by this point, I find myself in the third school of thought. There are many arguments supporting this theory, and what I believe to be very good arguments against statements 1 and 2. While I have only provided one specific named example for individual specialisation in a marine mammal, there are several documented cases of such occurrences among other marine taxa (e.g., pinnipeds14, sharks15, fish16) and a much larger number of studies for terrestrial species4. Thus, the claim that it is rare or weak, seems implausible to me.
Statement 2 is a little more complicated to tackle as it involves understanding how actions on a relatively small scale affect a whole population or even an ecosystem. For instance, consider two female sea otters living in a small coastal area where one sea otter prefers to eat turban snails and the other exclusively feeds on abalone. The sudden decline in abundance of either of these prey could lead to serious health and reproductive issues for those females. Should the low prey abundance persist, then poor health and reproduction of several females in a population that specialise on that prey item can rapidly lead to genetic loss and an overall population decline. Particularly if an individual’s or species’ home range is rather restricted or small. In the case of the sea otter, which are often touted as a keystone species due to its presence preventing sea urchin barren formation that is known to wreak havoc on kelp forests, knock-on effects of such a population decline could result in poor overall ecosystem health.
It may be easy to assume that one individual dolphin, otter, seal or whale cannot possibly make a difference to a whole population or ecosystem. This assumption strikes me as a little odd since humans are always told to ‘be the change they wish to see in the world’ and that ‘every person can make a difference’. Why then should these sentiments not be applicable to non-humans? While a gray whale may not hold a sign at a protest or run for president (actions commonly considered to cause change in the human world), perhaps the choice that a gray whale makes every day to only consume one species of zooplankton, can influence other gray whales in the area, predators from other taxa, habitat structure, other prey availability, and/or cause trophic cascades.
Through my research, I aim to elucidate whether the gray whales display some level of foraging individualisation while feeding in Port Orford, Oregon. I will use data from four years to compare tracks of individual whales with zooplankton samples collected in the area to correlate each individual’s movement patterns with prey availability. I will assess the quality of prey through bomb calorimetry and microplastic analysis of the zooplankton samples to determine energetic content and pollutant levels, respectively. This prey assessment will describe the potential effects of prey specialization on whales, which is fundamental to assessing overall population health. Individualisation can strongly affect fitness of individuals, either positively or negatively depending on several factors, which will undoubtedly have an impact at the population level.
(The videos below are examples of two different tactics we see the gray whales display while foraging along the Oregon coast in the summer months. The first video shows a whale foraging among kelp with some very acrobatic moves, while the second is of a whale employing the ‘sharking’ method where the whale is feeding benthically in such shallow depths that both the pectoral fin and the fluke stick out of the water, making the whale look like a ‘shark’.)
Carere C., & Locurto, C., Interaction between animal personality and animal cognition. Current Zoology, 2015. 57(4): 491-498.
Gosling, S.D., From mice to men: what can we learn about personality from animal research?Psychological Bulletin, 2001. 127(1): 45-86.
Bolnick, D.I., et al., The ecology of individuals: incidence and implications of individual specialisation. The American Naturalist, 2003. 161(1): 1-28.
Torres, L.G., & Read, A. J., Where to catch a fish? The influence of foraging tactics on the ecology of bottlenose dolphins (Tursiops truncatus) in Florida Bay, Florida. Marine Mammal Science, 2009. 25(4): 797-815.
Gisburne, T.J., & Connor, R.C., Group size and feeding success in strand-feeding bottlenose dolphins (Tursiops truncatus) in Bull Creek, South Carolina. Marine Mammal Science, 2015. 31(3): 1252-1257.
Gazda, S.K., et al., A division of labour with role specialization in group-hunting bottlenose dolphins (Tursiops truncatus) off Cedar Keys, Florida.Proceedings of the Royal Society: Biological Sciences, 2005. 272(1559): 135-140.
Ford, J.K.B., et al., Dietary specialization in two sympatric populations of killer whales (Orcinus orca) in coastal British Columbia and adjacent waters. Canadian Journal of Zoology, 1998. 76(8): 1456-1471.
Rossi-Santos, M.R., & Wedekin, L.L., Evidence of bottom contact behaviour by estuarine dolphins (Sotalia guianensis) on the Eastern Coast of Brazil.Aquatic Mammals, 2006. 32(2): 140-144.
Peddemors, V.M., & Thompson, G., Beaching behaviour during shallow water feeding by humpback dolphins (Sousa plumbea). Aquatic Mammals, 1994. 20(2): 65-67.
Tyack, P., Population biology, social behavior and communication in whales and dolphins. Trends in Ecology & Evolution, 1986. 1(6): 144-150.
Wiley, D., et al., Underwater components of humpback whale bubble-net feeding behaviour.Behaviour, 2011. 148(5/6): 575-602.
Estes, J.A., et al., Individual variation in prey selection by sea otters: patterns, causes and implications. Journal of Animal Ecology, 2003. 72(1): 144-155.
Cherel, Y., et al., Stable isotopes document seasonal changes in trophic niches and winter foraging individual specialization in diving predators from the Southern Ocean. Journal of Animal Ecology, 2007. 76(4): 826-836.
Matich, P., et al., Contrasting patterns of individual specialization and trophic coupling in two marine apex predators. Journal of Animal Ecology, 2010. 80(1): 294-305.
Svanbäck, R., & Persson, L., Individual diet specialization, niche width and population dynamics: implications for trophic polymorphisms. Journal of Animal Ecology, 2004. 73(5): 973-982.
By Lisa Hildebrand, MSc student, OSU Department of Fisheries and Wildlife, Geospatial Ecology of Marine Megafauna Lab
Science is truly meaningful because it is shared amongst colleagues and propagated to the wider public. There are many mediums through which information dissemination can occur. A common and most rigorous form is the peer-review scientific publication of papers. The paper approval process is vigorous, can last a long time – sometimes on the scale of several years – and is therefore an excellent way of vetting science that is occurring all over the world in many different disciplines. New studies build upon the results and downfalls of others, and therefore the process of research and communication of knowledge is continuous.
However, scientific journals and the publications within them can be quite exclusive; they are often only accessible to certain members of the scientific community or of an educational institution. For a budding scientist who is not affiliated with an institution, it can be very hard to get your hands on current research. Having said that, this issue is slowly becoming inconsequential since open access and free journals, such as PeerJ, are becoming more prevalent.
Something that is perhaps more restrictive is the amount of topic-specific jargon used in publications. While a certain degree of jargon is to be expected, it can sometimes overwhelm a reader to the point where the main findings of the research become lost. This typically tends to be the case for those just at the beginning of their scientific journeys, however I have also known professors to comment on confusing sections of publications due to the heavy use of specific jargon.
Conferences on the other hand offer an opportunity to disseminate meaningful science in a more open and (sometimes) more laid-back setting (this may not always be true depending on the field of science and the calibre of the conference). Researchers of a particular field congregate for a few days to learn about current research efforts, ponder potential collaborations, peruse posters of new studies, and argue over which soccer team is going to win the next World Cup. That is the beauty of conferences – it is very possible to get to know each other on a personal level. These face-to-face opportunities are especially beneficial to students as this relaxed atmosphere lends itself to asking questions and engaging with scientists that are leaders in their fields.
Just over a week ago, the GEMM Lab had the opportunity to do all of the above-mentioned things. PI Dr Leigh Torres and I participated in the Marine Technology Summit (MTS) in Newport, OR, a “mini-conference” at which shiny, new technologies for use in marine applications were introduced by leading, and many local, tech companies. While Leigh and I are not technologists, we are ecologists that have greatly benefitted from recent, rapid advances in technology. Both of our gray whale (Eschrichtius robustus) research projects use different technologies to unveil hitherto unknown ecological aspects of these marine mammals.
Leigh presented her research that involves flying drones over gray whales that grace the Oregon coastal waters in the spring and summer. Through these flights, many previously undocumented gray whale behaviours have been captured and quantified1, such as headstands, nursing and jaw snapping (check out the video below). Furthermore, still images from the videos have been used to perform photogrammetry to assess health and body condition of the whales2. These drone flights have added a wealth of valuable data to the life histories of individual whales that previously were assessed mainly through photo-identification and genetics. This still fairly new approach to assess health by using drones can be relatively cost-effective, which has always been one of Leigh’s key aims throughout her research so that methods are accessible to many scientists. These productive drones used by the GEMM Lab are commercially available (yup, just like the ones you see on the shelves at your local Best Buy!).
The use of cost-effective technologies is a common theme in the GEMM Lab and is also central to my research. The estimation of zooplankton density is vital to my project to determine whether gray whales in Port Orford select areas of high prey density over areas with less dense prey. However, the traditional technology used to quantify prey densities in the water column are often bulky or expensive. Instead, we developed a relatively cheap method of measuring relative zooplankton density using a GoPro camera that we reel down through the water column from a downrigger attached to our research kayak. While we are unable to exactly quantify the mass of zooplankton in the water column, we have been successful in assessing changes in relative prey density by scoring screenshots of the footage.
While our drones and GoPro technology is not without error, technology rarely is. In truth, we lost our GoPro for several days after it became stuck in a rock crevice and Leigh’s team regrettably lost a drone to the depths of the ocean this summer. This technology reality was part of the reason I presented at the MTS as I wanted to involve technologists to find solutions to some of the problems I have experienced. Needless to say, I got a lot of excellent input from many different people, for which I am very grateful. In addition to developing new opportunities to collaborate, I was very content to sit in the audience and hear about the ground-breaking new marine technologies that are in development. Below are short descriptions of two new technologies I learned about that are revolutionising the marine world.
ASV Unmanned Marine Systems develop autonomous surface vehicles that are powered by renewable energies (solar panels and wind turbines). These vessels are particularly useful for oceanographic monitoring as they are more capable than weather buoys and much more cost effective than manned weather ships or research vessels. Additionally, they can be used for a lot of different marine science applications including active acoustic fisheries monitoring, water quality monitoring, and cetacean tracking. Some models even have integrated drones that are launched and retrieved autonomously.
The Ocean Cleanup is a company that develops technologies to clean garbage out of our oceans. There is presently a large mission underway by The Ocean Cleanup to combat the Great Pacific Garbage Patch (GPGP). The GPGP is essentially a large island in the middle of the North Pacific Ocean comprised of diverse plastic particles – wrappers, polystyrene, fishing line, plastic bags, the list is endless3. A recent study estimates the amount of plastic in the GPGP to be at least 79 thousand tonnes of ocean plastic4. Unfortunately, the GPGP is not the only one of its kind. The Ocean Cleanup hopes to reduce this massive plastic accumulation with the development of a system made up of a 600-m long floater that sits on the ocean’s surface with a 3-m deep skirt attached below it. The skirt will collect debris while the float will prevent plastic from flowing over it, as well as keep the whole system afloat. The system arrived at the GPGP last Wednesday and the team of over 80 engineers, researchers, scientists and computational modellers have successfully installed the system. The team posts frequent updates on their Twitter and I would highly recommend you follow this possibly revolutionary technology.
While attending the MTS, it felt like there are no bounds for the types of marine technology that will be developed in the future. I am excited to see what ecologists working with technicians can develop to keep applying technology to address challenging questions and conservation issues.
Torres, L., et al., Drone up! Quantifying whale behaviour from a new perspective improves observational capacity.Frontiers in Marine Science, 2018. 5, DOI:10.3389/fmars.2018.00319.
Burnett, J.D., et al., Estimating morphometric attributes on baleen whales using small UAS photogrammetry: A case study with blue and gray whales, 2018.Marine Mammal Science. DOI:10.1111/mms.12527.
Kaiser, J., The dirt on the ocean garbage patches. Science, 2018. 328(5985): p. 1506.
Lebreton, L., et al., Evidence that the Great Pacific Garbage Patch is rapidly accumulating plastic. Scientific Reports, 2018. 8(4666).
By Lisa Hildebrand, MSc student, OSU Department of Fisheries and Wildlife, Geospatial Ecology of Marine Megafauna Lab
To many people, six weeks may seem like a long time. Counting down six weeks until your favourite TV show airs can feel like time dragging on slowly (did anyone else feel that way waiting for Blue Planet II to be released?). Or crossing off the days on your calendar toward that much-needed holiday that is still six weeks away can feel like an eternity. It makes sense that six weeks should feel like a long time. After all, six weeks are approximately a ninth of an entire year. Yet, I can assure you that if you asked anyone on my research team this summer whether six weeks was a long time, they would all say no.
As I watched each of my interns present our research to a room of 50 engaged community members (Fig. 1) after our six week research effort, I couldn’t help but feel an overwhelming sense of pride for all of them at how far they had come during the course of the field season.
On the very first day of our two-week training back in July, I gave my team an introductory presentation covering gray whales, their ecology, what the next six weeks would look like, how this project had developed and its results to date (Quick side-note here: I want to give a huge shout out to Florence and Leigh as this project would not be what it is today without their hard work and dedication as they laid the groundwork for it three years ago and have continued to improve and expand it). I remember the looks on my interns’ faces and the phrase that comes to mind is ‘deer in headlights’. It isn’t surprising that this was the case as this internship was the first time any of them had done marine mammal field work, or any kind of field work for that matter. It makes me think back to my first taste of field work. I was a fresh high school graduate and volunteering with a bottlenose dolphin research group. I remember feeling out of place and unsure of myself, both in terms of data collection skills but also having to live with the same people I had worked with all day. But as the first few days turned into the first few weeks, I grew into my role and by the end of my time there, I felt like an expert in what I was doing. Based on the confidence with which my interns presented our gray whale foraging ecology research to an audience just over a week ago, I know that they too had become experts in these short six weeks. Experts in levelling a theodolite, in sighting a blow several kilometres out from our cliff site, in kayaking in foggy conditions, in communicating effectively in high stress situations – the list goes on and on.
While you may have read the previous blog posts written by each of my interns in the last four weeks and thus have a sense of who they are, I want to tell you a little more about each of these hardworking undergraduates that played a large role in making this year’s Port Orford gray whale season so effective. Although we did not have any local high school interns this year, the whole team hails from Oregon, specifically from Florence, Sweet Home and Portland.
Haley Kent (Fig. 2), my co-captain and Marine Studies Initiative (MSI) intern, an Environmental Science major, is going into her senior year at OSU this fall. She is focused and driven, which I know will enable her to pursue her dream of becoming a shark researcher (I can’t even begin to describe her excitement when we saw the thresher shark on our GoPro video). I couldn’t have asked for a better right hand person for my first year taking over this project and I am excited to see what results she will reveal through her project of individual gray whale foraging preferences. Also, Haley has a big obsession for board games and provided the team with many evenings of entertainment thanks to Munchkin and King of Tokyo.
Dylan Gregory (Fig. 3) is transferring from Portland Community College and is going to be an OSU junior this fall. Not only was Dylan always extremely helpful in working with me to come up with ways to troubleshoot or fix gear, but his portable speaker and long list of eclectic podcasts always made him a very good cliff team partner. He was also Team Whale Storm’s main chef in the kitchen, and while some of his dishes caused tears & sweat among some team members (Dylan is a big fan of spices), there were never any leftovers, indicating how delicious the food was.
Robyn Norman (Fig. 4) will be a sophomore at OSU this fall and her commitment to zooplankton identification has been invaluable to the project. Last year when she was a freshman, Robyn was given our zooplankton samples from 2017, a few identification guides and instructions on how to use the dissecting microscope, before she was left to her own devices. Her level of independence and dedication as a freshman was incredible and I am very grateful for the time and skills she has given to this work. Besides this though, Robyn always brought an element of happiness to the room and I can speak on behalf of the rest of the team, that when she was gone for a week on a dive trip, the house did not feel the same without her.
Hayleigh Middleton (Fig. 5), a fresh high school graduate and freshly turned 18 during the project, is starting as a freshman at OSU this fall. She is extremely perceptive and would (thankfully) often remind others of tasks that they had forgotten to do (like take the batteries out of the theodolite or to mention the Secchi depth on the GoPro videos). I was very impressed by Hayleigh’s determination to continue working on the kayak despite her propensity for sea sickness (though after a few days we did remedy this by giving her raw ginger to chew on – not her favourite flavour or texture but definitely very, very effective!). She is inquisitive about almost everything and I know she will do very well in her first year at OSU.
Thank you, Team Whale Storm (Fig. 6), for giving me six weeks of your summer and for making my first year as project leader as seamless as it could have been! Without each and every one of you, I would not have been able to survey for 149.2 hours on the cliff, collect over 300 zooplankton samples, identify 31 gray whales, or launch a tandem kayak at 6:30 am every morning.
My interns were not the only ones to experience many “firsts” during this field season. I learned many new things for the first time right alongside them. While taking leadership is not a foreign concept to me, these six weeks were my first real experience of leading a project and a team for a sustained period of time. Managing teams, delegating tasks and compiling data felt gratifying because I felt like I was exactly where I should be (Fig. 7).
I dealt with many daunting tasks, yet thanks to the support of my interns, as well as Tom (Port Orford field station’s incredible station manager), Florence and Leigh, I learned how to resolve my problems: I fixed and replaced broken or lost gear (I am not a very mechanically inclined person; Fig. 8), budgeted food for five hungry people doing tiring field work (I’ve only ever budgeted for one person previously), and taught people how to use gear that I had not often used before (I can say now that the theodolite and I are friends, but this wasn’t the case for the first few weeks…).
In the lead up to the summer field season this year, Leigh said to me, in one of the many emails we exchanged, that leading the project was a big task but that it was just six weeks long. She suggested that I rest up and get organised as much as I could ahead of time because, after all, the data collected this summer was going to be my thesis data, so I would want it to be as good as possible. Looking back, she couldn’t have been more right – the six weeks simply flew by, I did need the rest she had advised, and it definitely was a big task. I can’t wait for it to happen all over again next summer.