Pinned toot

Hi everybody! I'm Chuck, currently based in Maryland and these days I primarily work on shark and ray movement ecology and habitat preferences. I used to look at shark puke to see what they were eating, and I occasionally still dabble in that. Squalus acanthias is the best shark.

One more publication before the new year! I'm one of the authors on this paper modeling Smooth Dogfish habitat along the east coast of the U.S. Different habitat preferences between males and females may mean a more sustainable male-only fishery is possible. Open access! afspubs.onlinelibrary.wiley.co

For the second time we found pieces of fishing gear in a Pamlico Sound juvenile Bull Shark stomach, this time a small hook with a bit of braided line. While we've only looked at ten sharks, 20 % of them have had fishing gear in their stomachs. A not insignificant number of fishermen have reported bite-offs and attacks on hooked fish in Pamlico Sound, and our results so far suggest these juvenile Bull Sharks may be the culprits.

We found more evidence of elasmobranch-on-elasmobranch predation. This looks like part of the tail (including the barb) from a pretty substantial stingray. The lack of the rest of the ray suggests it probably got away after the shark chomped its tail off, and we've found several rays in the Pamlico Sound Bull Shark nursery area with missing tails. Two of the ten shark stomachs we've looked at so far have had ray remains in them.

Finished off going through ten sets of juvenile Bull Shark stomach contents collected from Pamlico Sound, North Carolina. Highlights included this fairly large Mullet. Along with Atlantic Menhaden, Striped and White Mullet are among the main forage fishes in North Carolina estuaries. Everything eats them, including young Bull Sharks. I predict many of our unidentified fish remains will turn out to be these guys.

Surprisingly, we found evidence that at least one of the juvenile Bull Sharks we sampled stomach contents from had encountered a human before. Most of a fishing rig was in its stomach. It looks like the fisherman may have tried to cut the hook, which makes me wonder how the rest of the rig ended up in there.

One juvenile Bull Shark stomach included this long skinny fish that's almost definitely some kind of eel. Since both Conger and American Eels can occur in Pamlico Sound (and one is considerably more of a conservation concern than the other) genetic ID will tell us which it is (or if it's something else entirely).

Though partially-digested, there are few tells for identifying this as more than likely an Atlantic Menhaden. These include the strip of "dark meat" down the middle, the patch of silvery skin, and that big dark gizzard that seems to be the last part of this fish to be digested. Everything likes to eat Menhaden, including apparently at least one juvenile Bull Shark.

Juvenile Bull Sharks seem to appreciate Pamlico Sound Blue Crabs just as much as I do.

Gut contents we found from juvenile Bull Shark stomachs today included this large, partially-digested fish. Can't wait for the genetic barcode results to tell what this beast was before it became shark food.

Pretty excited to get back into feeding habits analysis looking at the diet of juvenile Bull Sharks from Pamlico Sound, North Carolina. As you can probably tell, it can be tough to identify some of the more-digested prey items, so we're saving samples for genetic ID.

is great for galvanizing change both large and small.

One of the conference favorite restaurants is Indah. After a week of delegates asking to "hold the straw" and having their kids attend the kids conference, the management decided to switch to only offering straws on request.

It's a small thing but a great reminder that, above all, conservationists should lead by example.

"We do two things in conservation really well. We monitor change and we quantify what is lost."

That's not good enough.

A little retrospective from my original research blog. I've been working with North Carolina sharks for quite some time, and will probably continue to work with them for quite some time too. yalikedags.southernfriedscienc

It's sharks, but it's also climate change. Newly-published co-authored with @WhySharksMatter finds evidence that Bull Sharks have been using Pamlico Sound, North Carolina as a nursery habitat, but only since 2011. This is because rising ocean temperatures have brought the estuary right into the Bull Shark comfort zone. nature.com/articles/s41598-018

The new paper on shark habitat in Pamlico Sound is also available as a handy blog post summary, which has one of my personal favorite titles. southernfriedscience.com/ameri

Thrilled to announce the publication of a new paper (and a huge chunk of the research I started in grad school). America's second-largest estuary, Pamlico Sound, North Carolina, hosts a diverse community of sharks, but not all of them are using the same areas. Come of the sharks, stay for the complex spatial statistics and colorful data maps. journals.plos.org/plosone/arti

Planning to put more content on here shortly. Lots of material coming up, but that's all I can say about it for now. Soon, tooters, soon...

Hi everybody! I'm Chuck, currently based in Maryland and these days I primarily work on shark and ray movement ecology and habitat preferences. I used to look at shark puke to see what they were eating, and I occasionally still dabble in that. Squalus acanthias is the best shark.

That's totally fine, I like all the people I'm following anyway (and most of them I've already been following on other platforms).

Looks like I'm somehow already following a bunch of people. So did I end up automatically following people I'm following on Twitter, or does everyone on oceansocial automatically follow each other?

Show more
Mastodon

oceansocial.us is a Mastodon instance for marine professionals working in science, education, conservation, policy, and management. Building upon Dr. Craig McClain's work on establishing "Nerds of Trust" on social networks oceansocial.us is a cohesive community within the fediverse to discuss and share ocean news, stories, and ideas as well as providing a resource for people interested in connecting with marine professionals.

If you'd like to help support oceansocial.us and help cover administration and server hosting fees, please consider making a small monthly contribution to Andrew's Patreon campaign: Andrew David Thaler is creating tools for ocean science and conservation.