Post Fieldwork Reflections: The Summer of Sharks

Well, after a whirlwind summer, I am officially finished with my first field season of shark sampling. All in all, I sampled from a whopping 71 sharks and tagged 20 of them with acoustic tags. I’ll have another field season next year, but until then I’ll be sorting through samples and thinking of ways to make my research go smoother and easier. One way I’ll be doing this is redesigning our shark sling — currently, it’s like a U shaped piece of fabric that is 8 feet long (we also like to call it the “shark taco” if that helps you picture it, but you can also watch a video of a shark release below). It does great at holding the shark in place but with the winds and currents in Willapa Bay, however, the sling often turns into an underwater sail, swinging out or pulling the boat around. So, with that in mind, I’ll be creating a “version 2” which will hopefully be able to restrain the shark AND stay solidly in place next to the side of the boat.

I also spent a lot of time talking with fishermen this summer, which is always one of my favorite parts of research. Walking the docks in Willapa Bay allows me to meet with people face-to-face and talk to them about the things they see on the water….particularly because they spend a lot more time out there than I do (unfortunately!). Some of my favorite interactions were with 2nd or 3rd generation fishermen who didn’t know that there were sharks in Willapa Bay at all. Most of these fishermen were oyster farmers and therefore never use gears to catch these large animals. Still, being able to talk about some of the top predators in their local waters is a great opportunity to spread awareness and understanding about the impact that sharks have, particularly in a positive light.

I wouldn’t have been able to conduct this research without the generous support of Oregon Sea Grant, and I just wanted to thank the amazing team of people there who answered questions, connected me with resources, and have continued to inspire me to make the greatest impact possible.

Jess Schulte and Dr. Taylor Chapple, head PI of the Big Fish Lab, release a broadnose sevengill shark back into the waters of Willapa Bay after collecting samples.
Jess Schulte holding a sevengill shark in place for sample collections.
Jess Schulte handlining for sevengill sharks in Willapa Bay, WA.

We’re gonna need a bigger boat…and a better understanding!

It’s June and we’re in the depths of field season! 

Myself and a WDFW colleague tagging a younger sevengill shark in Washington

My project focuses on incorporating broadnose sevengill sharks into ecosystem modeling in the northern California current ecosystem, which encompasses the coasts from San Francisco up to British Colombia. Historically, predators, in general, have not been included in our understanding of the Pacific Northwest coastal ecosystems (the few studies done have focused on orcas or pinnepeds such as sea lions). So, very little is known about sharks in this region. The broadnose sevengill is a large (up to 10 ft/3 meters and 230+ lbs/107 kgs), apex predator in other locations around the world. I suspect they play a similar role here in Oregon and Washington…especially when it comes to our very important local fisheries, like salmon, halibut, and crab! To find out, I am tagging sevengills with acoustic tags (to track movement) and taking tissue samples (to determine what they’re eating over different periods of time, using stable isotope and stomach content analysis). 


Since April, I’ve been going out once a month to look for sevengill sharks in Willapa Bay, WA. Sevengills – which live in temperate waters – show up seasonally in certain bays around the world. Willapa Bay, the second largest BAY on the west coast of the United States, is one of those specific bays. We’re not sure why sevengills show up there, but we do know that Willapa is also an important estuary for many species, including salmon, Dungeness crab, harbor seals, as well as Endangered Species Act-listed green sturgeon. Originally we thought that the sevengills showed up in June or July. But after doing some reading of some previous studies, I suspected that they might be showing up as early as April. And if they were, I wanted to sample them.
So out we went in April. Three days on the water and…..nothing! I was confused. I thought they’d be here! Maybe I’m just wrong? After talking with some local fishermen, though, we discovered…the local Chinook salmon run was running late. Maybe related? Unknown. We went home empty-handed.


In May, we returned. Before we got on the water, a local fisherman revealed…the salmon are here! Okay, but where are the sharks? Unknown. We got out on the water and spent most of the day fishing for sharks. Waiting waiting waiting. Right as I was about to give up — tug tug tug. “Did I catch a stick?” I pulled up my line and…..SHARK! It’s a sevengill! They’re here! I almost cried (a moment captured perfectly on camera by my advisor). How exciting!!! We caught two more sharks that day. AND we detected previously tagged sharks…from 2021! They are here! Which begs the question. What are they doing though? Unknown!

The exact moment that I saw the first sevengill shark in April, confirming they had officially arrived! I almost cried. (Shoutout to my advisor for snapping this picture).

Is it related to the salmon, or is it something else? Still unknown. But that’s what I’m trying to find out. Stay tuned (links below to keep up with me and my lab on social media)!

A broadnose sevengill shark, ready to be released after tagging!

Hitting the ground running!

Hi there! My name is Jess Schulte and I am part of the newest batch of 2021 Oregon Sea Grant Scholars. I am working to gather data on the movement and foraging ecology of shark predators – specifically the broadnose sevengill (Notorynchus cepedianus) – in the Northern California Current System (NCCS). My research will provide the first insights into how this predator – and likely others – maintain these productive marine ecosystems through top-down interactions. My project focuses on integrating data from satellite and acoustic receivers and stomach content and stable isotope analyses from broadnose sevengills to better understand the ecosystem dynamics of NCCS systems, and will finally enable shark predators to be incorporated into our understanding of the area and wider NCCS (which has never been done before!). In other words, where do they go, what are they eating, and how does it affect us AND the fish that we eat here in the Pacific Northwest (salmon, halibut, crab, etc.)?

I am a first year PhD student at Oregon State University and before classes started this year, I was able to get out into the field to kick-off my research. We spent three days out on the boat, dropping hooks in the water baited with discarded salmon heads. We didn’t have to wait long to catch sharks…almost every time we dropped a line down, we’d quickly pull it back up with a sevengill on the end! For this field trip, we focused on deploying our acoustic tags. These tags provide fine-scale information on where/how the sharks are moving within a smaller, defined area (such as a bay). This summer, we will be deploying satellite tags that will track the sharks as they leave their summer bay residences in Oregon and head elsewhere. We will also be collecting stomach contents as well as tissue samples to do stable isotope analysis. The former will provide data on recent feedings, and the latter will provide foraging information on a longer scale – dating back weeks to months!

Additionally, my research will collaborate with local tribes through the incorporation of tribal youth into my fieldwork. We will be taking interested tribal youth members into the field to teach them techniques about shark catching and tagging while also helping me to better understand the cultural context around the research itself. I’m also looking forward to continued outreach and engagement, including a display at OSU’s Hatfield Marine Research Center! We’ll be setting up social media platforms soon so keep an eye out for those as well (in the meantime, those interested can check out the Big Fish Lab Instagram page. We’re also doing other great research on the movement of other shark species as well as shark physiology and stress responses!).

I am excited and proud to be one of the newest Oregon Sea Grant Scholars and contribute to OSG’s mission and values by informing methods for ecosystem-based management and promoting community and industry outreach and engagement. While I’m still getting a handle in first year of graduate school, I’m eager to full-steam ahead on my Big Fish Lab research in the spring and summer!

Myself, preparing a broadnose sevengill for an acoustic tag deployment in Coos Bay, OR