Month: August 2025

Zoop Gone Missing: A Whale’s Dinner Dilemma

Dawson Mohney, TOPAZ/JASPER HS Intern, Pacific High School Graduate

My name is Dawson Mohney, I am a high school intern for the 2025 TOPAZ/JASPER team this field season. I first heard about the TOPAZ/JASPER internship from my friend Jonah Lewis, a previous intern from the 2023 field season. Coincidentally, Jonah and I both graduated this year from Pacific High School here on the coast—small world. I have called Port Orford my home for most of my life, and in recent years I discovered that a gray whale research project has been happening in my own backyard. Growing up less than a mile from the Oregon Coast, I’ve spent a lot of time looking out into the water. I always liked how, no matter what happened in my life, the ocean was always there. This interest is what encouraged me to apply for the internship with the hope of discovering more about the ocean, a substantial part of my home and family.

Fig 1: Picture fellow intern Maddie took of me (Dawson) during our trip to Natural Bridges.

A critical part of this project is understanding not only the magnificent gray whales but also the much less apparent zooplankton–after all, the whales need to eat a lot of zooplankton! Many different species of zooplankton—“zoop” for short—call the Oregon coast home. Each day, as we kayak to our 12 sample stations within the gray whale feeding grounds of Mill Rocks and Tichenor’s Cove, I find myself wondering which species of zoop I’ll get to identify later under the microscope.

Throughout the duration of this internship, our team has met to discuss a few research papers published by GEMM Lab members, including research produced from the TOPAZ/JASPER projects. Recently, I read, “Do Gray Whales Count Calories? Comparing Energetic Values of Gray Whale Prey Across Two Different Feeding Grounds in the Eastern North Pacific,” by Hildebrand et al. who describe the caloric content of different zooplankton species. Before reading this paper, I didn’t realize whale prey could vary in nutritional value – much like food for humans. This paper made it clear that each of the different species of zooplankton is just as important as the last, but consuming more of the higher caloric species such as the Neomysis rayii or the Dungeness crab larvae would certainly be a welcome meal. Seeing these “healthy” meals in the area makes me hopeful for the whales.

Fig 2: Image of a crab larvae in their megalopae stage.

From reading previous blog posts, the foraging habits of the whales this season appear to be unusual. In prior TOPAZ/JASPER field seasons, gray whales have often been tracked foraging near or around our Mill Rocks and Tichenor Cove study sites. This season, we haven’t tracked a single whale in Mill Rocks and only two in Tichenor Cove. Could there just not be enough good zoop?

Along with this lack of whales, there does seem to be a lack of these “high calorie zoop species”. Our team has most frequently collected samples primarily comprising of Atylus tridens, a lower calorie prey type. In fact, during one of our earlier kayak training days this field season we collected 2,019 individual A. tridens. However, since this day we have collected sparse amounts of zooplankton in our samples, ranging from zero to 121 in a given sample. Our total zoop count thus far is 2,524 zooplankton, a third of the total zooplankton collected last field season.

Fig 3: Image of an Atylus tridens under a microscope.

As for whale presence, we have been observing many whales blows near Hell’s Gate as mentioned in last week’s blog written by fellow intern Miranda Fowles. From our cliff site, it has been difficult to know whether these are gray whales or a different kind of whale, leading us to venture out to the Heads to get a better look. The persistence of whales in this area is certainly unusual, and perhaps it can be explained by a larger amount of higher calorie zooplankton species in the Hell’s Gate area.

Fig 4: Dawson tracking blows by Hell’s Gate with the theodolite.

Being part of the TOPAZ/JASPER project, I have become exposed to what the true meaning is behind “fieldwork,” including learning how to be flexible and adapt to new challenges every day. What I have most enjoyed is the team’s ability to overcome any new hurdle together as a unit.  My dad often says, “You learn something new every day,” and this internship couldn’t embody this quote more. In just these 5 weeks, it almost feels like my head is now a couple sizes bigger.

Before this experience, I never thought much about how one might track a whale or how different microscopic species could have such a profound impact on a whale’s decision to forage. Now I feel I understand just how important these less than obvious factors are and the effort which goes behind understanding these relationships. I can only hope future opportunities teach me as much as joining the TOPAZ/JASPER legacy has—it’s an experience that, even just a few days into the 2025 field season, I knew would be hard to match.

Fig 4: Dawson (navigator) and Miranda (sampler) during kayak training on their way to Mill Rocks.

Hildebrand, L., Bernard, K. S., & Torres, L. G. (2021). Do Gray Whales Count Calories? Comparing Energetic Values of Gray Whale Prey Across Two Different Feeding Grounds in the Eastern North Pacific. Frontiers in Marine Science, 8, 683634. https://doi.org/10.3389/fmars.2021.683634

Whales Off Course: Theodolite Tracking in an Unpredicted Area

Miranda Fowles, GEMM Lab TOPAZ/JASPER Intern, OSU Fisheries and Wildlife Undergraduate

Hello! My name is Miranda Fowles, and I am the OSU intern for the 2025 TOPAZ/JASPER project this summer! I recently earned my bachelor’s degree – almost, I have one more term, but I walked at commencement in June – from Oregon State University in Fisheries, Wildlife and Conservation Sciences and a minor in Spanish. My interest in whales began at a young age during a visit to SeaWorld. While I didn’t enjoy the killer whale shows for their entertainment aspect, this exposure allowed me to see a whale for the first time. From then on, I knew I wanted to contribute to understanding more about these animals, even if I wasn’t always sure how to make that happen. My decision to pursue Fisheries and Wildlife sciences was set from the beginning, however I wondered if there were actually opportunities to study whales.

Last summer, I was a MACO intern and stayed at the Hatfield Marine Science Center where I met last year’s TOPAZ/JASPER REU student, Sophia Kormann, and she raved all about her experience, so I just had to apply for this year’s internship! I remember feeling so nervous for the interview, but Dr. Leigh Torres and Celest Sorrentino’s kindness and inspiration quickly put me to ease. When I found out I was offered the position, I was just more excited than I’d ever been!

My day-to-day life as a TOPAZ/JASPER intern here at the Port Orford Field Station looks one of two ways: either on the kayak or the cliff site. When we are ocean kayaking, we go to our 12 sampling sites in the Mill Rocks and Tichenor Cove study areas (Fig. 1), where we collect zooplankton samples (Fig. 2) and oceanographic data with our RBR (an oceanographic instrument), as well as GoPro footage. When on the cliff site, we keep our eyes peeled for any whales to take pictures of them and mark their location in the water with a theodolite.

Fig. 1: Map of our study sites (Tichenor Cove and Mill Rocks) and where we have been seeing gray whales (Hell’s Gate) circled in green, and our Cliff Site.
Fig. 2: Miranda Fowles out on the kayak pointing at her zooplankton samples.

A theodolite is an instrument that is used for mapping and engineering; in our case it is used to track where a gray whale blows and surfaces (For more info, please see this blog by previous intern Jonah Lewis). Each time a whale surfaces, we use the theodolite to create a point in space that marks its location. Once we have multiple points, we can draw lines between each point to establish the track of the whale. These tracklines can then be used to make assumptions of the whales’ behavior. For example, if the trackline is straight, and the individual is moving at a consistent speed and direction, we can assume the whale is transiting. Whereas if the trackline is going back and forth in one small area, the whale is likely searching or foraging for food (Hildebrand et al., 2022).

In last week’s blog my peer Nautika Brown showed how photo ID is a critical part in our field methods. When theodolite tracking, we assign a number with each new individual whale observation. If the whale is close enough, we also capture photographs of the whale (Fig. 3) and match it up to its given number, allowing us to link the trackline to an individual whale so we can understand more about individual behavior. Documenting individual specific behavior is important because previous research has shown that age, size and the individual ID of a whale can all influence different foraging tactic use (Bird et al., 2024). Therefore, each season as we collect more and more data, we establish a repertoire of recurring or new behaviors to sieve for trends and patterns.

Fig. 3: Photo of a gray whale surfacing captured from our cliff site.

I find animal behavior to be an integral role in many ecological studies, and I am intrigued to explore this topic more. As marine mammals that spend most of their time underwater, cetaceans are quite an inconspicuous species to study (Bird et al., 2024), but by studying their ecology through photo ID and theodolite tracking we get insight into who they are, how they behave, and where they go.

Up until this point in the season, we have theodolite tracked gray whales for 12 hours and 3 minutes (woohoo). Interestingly, most of these tracks of whales have been near an area called “Hell’s Gate”, which is located around large rocks toward the far west of our study site (Figs. 2 and 4). We can assume, but cannot be sure, that the whales are feeding here because they spend so much time in the area, and return day after day. According to Dr. Torres, the consistent use of this area near Hell’s Gate by gray whales is unusual. In the prior 10 years of the TOPAZ project, few whales have been tracked foraging in this area near Hell’s Gate, but rather most whales have foraged in the Mill Rocks and Tichenor Cove areas. It is interesting to think about why the whales are behaving differently this year. Maybe this is due to variations in prey availability at these different sites. In recent years, Port Orford has been affected by a surge in purple sea urchin density, which have overgrazed the once prominent kelp forests here. A high urchin density decreases the kelp condition, which then leads to less habitat for zooplankton, creating a decline in prey availability for gray whales (Hildebrand et al., 2024). Upon reflection of my time on the kayak, I have noticed minimal kelp and low zooplankton abundance when conducting our zooplankton drops in our Mill Rocks and Tichenor Cove study sites. Additionally, I have also noticed many purple sea urchins in our GoPro videos. With the effects of this trophic cascade in mind, not observing any gray whales in our traditional study sites is understandable. With these gray whales more commonly seen near Hell’s Gate this year, I am curious to know what prey is attracting them there. Perhaps it is a different type of prey species or one that is high in caloric value than what is in the Mill Rocks and Tichenor Cove areas.

Fig. 4: Intern Nautika Brown looking at Hell’s Gate through the binoculars. Hell’s Gate is the passage between the two large boulders in the distance.

From actively observing whales and learning from my mentor, Celest, I have started to understand that behavior is a critical piece to any form of studying gray whales (and all species). By integrating photo-ID and theodolite tracking, we can learn so much about whale behavior, from where they eat, who is spending time where, and how they may adjust their behavior in response to a changing environment. The TOPAZ/JASPER internship has allowed me to truly comprehend what field research is like, how studying the behaviors of an individual is important, and how detail and patience are extremely necessary when collecting data. As this summer is continuing, I wonder if we will continue to see gray whales primarily feeding in the Hell’s Gate area, or if we will start to observe them more in the Mill Rocks and Tichenor Cove sites like previous years. The thrill of seeing gray whales is unlike any other, and I am so ready to see more whales this season!

References:

Bird, C. N., Pirotta, E., New, L., Bierlich, K. C., Donnelly, M., Hildebrand, L., Fernandez Ajó, A., & Torres, L. G. (2024). Growing into it: Evidence of an ontogenetic shift in grey whale use of foraging tactics. Animal Behaviour, 214, 121–135. https://doi.org/10.1016/j.anbehav.2024.06.004

Hildebrand, L., Derville, S., Hildebrand, I., & Torres, L. G. (2024). Exploring indirect effects of a classic trophic cascade between urchins and kelp on zooplankton and whales. Scientific Reports, 14(1), 9815. https://doi.org/10.1038/s41598-024-59964-x

Hildebrand, L, Sullivan, F. A., Orben, R. A., Derville. S., Torres L. G. (2022) Trade-offs in prey quantity and quality in gray whale foraging. Mar Ecol Prog Ser 695:189-201 https://doi-org.oregonstate.idm.oclc.org/10.3354/meps14115

A Nauti(k)al Journey with Photo ID  

Nautika Brown, GEMM Lab TOPAZ/JASPER Intern, recent Lake Roosevelt high school graduate 

Hi everyone! I’m Nautika Brown, a recent graduate at Lake Roosevelt High School in a small town on the Colville Indian Reservation in Washington.  

Growing up in beautiful Eastern Washington, I spent most all my days outside and, from the time I could swim, I was in the water. When I was little, I used to wish I was a fish so I could live underwater and swim every day of my life. And since then, I have always been fascinated by all animals that could live in and around water. This very fascination is what sparked the idea of becoming a marine biologist. Animals AND water, perfect! 

(Left): Nautika holding a fish she caught back home in Buffalo Lake.
(Right) Nautika with a new type of catch (purple sea urchin) while conducting a zooplankton drop at station MR 18.

Although, as you might assume, living on a reservation surrounded by wheat fields and a few lakes, there weren’t a lot of opportunities to explore my passion. Hence, when I came across a flyer for the 2025 TOPAZ/JASPER internship just a few days before the deadline, I submitted my application as soon as I could. I was so thrilled, I couldn’t imagine getting the chance to kayak with whales on the ocean! It was all I could talk about for weeks on end. 

Since starting my internship here in Port Orford, I have learned so many new things. During our first couple weeks at the field station, we went through a few different classes and trainings, one of them being a presentation on photo identification by GEMM Lab PhD candidate Lisa Hildebrand. Prior to this presentation, I had no idea photos were so important in marine mammal science. During this presentation, I learned about the many different identifiers of a whale and how you can apply them when looking at photos to identify a specific individual. For example, Lisa’s rule of three’s: to confidently ascertain an individual’s ID, at least 3 consistent characteristics between photos must be matched. At the end of this presentation, we even played a guessing game to test our new photo ID’ing skills. (I did pretty well – not to brag or anything.) 

Now with my new photo ID skills, I was excited to capture a photo of a gray whale. On our second day of training, we did spot a whale—but thanks to my newly learned photo-ID skills, I quickly realized it wasn’t the gray whale I was expecting. When the whale first surfaced, I noticed the lack of dorsal knuckles and its distinctly darker body—clear signs it wasn’t a gray whale, but a humpback whale! While it is common to see gray whales from shore along the Oregon coast as they feed in the very nearshore habitat, humpback whales are typically found in much deeper waters, further from shore. Over the last week we have seen a humpback whale within our study site across several days—and we’re not the only ones!  When chatting with the local fisherman pre and post kayak, a few have expressed their own excitement about seeing a humpback so close to shore as well. Throughout our conversations, the question of why a humpback would be so close to shore weighed on our minds, leading me to do my own online research.  

To investigate whether these humpback sightings have been of the same individual or multiple different whales, I decided to review the photos we have captured to try and determine a match. Once I conducted a first pass of the photos, I downloaded 10 of the most clear and definite shots and compared the photos using Lisa’s rule of threes. After reviewing the photos, I noticed that the humpback whale’s dorsal hump resembled one from a previous sighting, but I couldn’t find any other distinguishing markings on its body. While I couldn’t confirm we have been observing the same humpback whale, I gained a deeper understanding of the importance of clear, high-quality photos in photo-ID work.

(Left) Nautika getting ready to take pictures of whales with camera on our cliff site. 
(Right) Picture of humpback whale caught on camera on our 2nd day of training

After reading a few articles about humpback whale migration through Oregon, I found a few potential reasons behind this whale’s occurrence close to the shores of Port Orford. During the summer months, humpbacks travel to colder, more nutrient-dense places to feed, often near the shelf break (where the depth of the ocean suddenly gets deeper, around 200 m). Interestingly, the shelf break near Port Orford is not far from shore, and is a known hotspot for foraging humpback whales in the summer (Derville et al. 2022).  Humpback whales filter-feed on krill and small fish, so perhaps enough prey has moved into the waters near Port Orford to attract a humpback so close to shore. Another reason for this humpback to be close to shore could be the effects of climate change. As the waters warm, food distribution changes, causing multiple species, including humpbacks, to change their feeding grounds and migration routes (read more here).  Although the humpback sightings are outside the range of our kayak zooplankton sampling stations, it would be interesting to see what prey is in the water that is keeping them around.

So far, I have learned the importance of photo identification in marine mammal science and the many ways it can be used. I’m especially grateful for Lisa’s fun and insightful presentation at the start of the season and even more surprised by how quickly I was able to put those photo-ID skills into practice. With three weeks left in the field season, I’m excited to keep building on what I’ve learned and to keep growing my skills. And speaking of building, I’m also curious to see how my “kayak muscles” are shaping up by the end of this amazing TOPAZ/JASPER internship!  

  (Left) Nautika and Celest on kayak heading Mill Rocks stations. 
(Right) Miranda and Nautika wrapping up kayak training with a celebratory team dab

Derville, S., D.R. Barlow, C. Hayslip, and L.G. Torres, Seasonal, Annual, and Decadal Distribution of Three Rorqual Whale Species Relative to Dynamic Ocean Conditions Off Oregon, USA. Frontiers in Marine Science, 2022. 9: p. 868566.