The United States Congress is considering a nationwide ban on buying, selling, or trading shark fins. While several of my posts and tweets have briefly discussed my stance on such policies, I’ve never laid out my full argument in one post. Here is why I, as a shark conservation biologist, oppose banning the shark fin trade within the United States. The short answer is that the US represents a tiny percentage of overall consumers of shark fin, but provide some of the most sustainably caught sharks on Earth, as well as important examples of successful management, to the world. This means that banning the US shark fin trade won’t reduce total shark mortality by very much, but will remove an important example of fins coming from a well-managed fishery while also hurting American fishermen who follow the rules. Also, a focus on these policies promotes the incorrect belief that shark fin soup is the only significant threat to sharks, and that addressing the tiny part of that problem locally represents the end of all threats. For the longer answer, read on. And for the case for shark fin bans, please see this guest post from Oceana scientist Mariah Pfleger.
Author: David Shiffman
After a month hiatus for packing, moving, and unpacking, we’re back!
Cuttings (short and sweet):
- Watch a dogfish swim around British Columbia, video by GEERG.
- Follow Dr. Andrea Kroetz, a postdoc studying sawfish, on twitter!
- What to look for in canned tuna, a new update from Seafood Watch.
- 13 facts about mola mola, the ocean sunfish. By Richard Smith, for Sport Diver.
Cuttings (short and sweet):
- Watch the sharks at Palmyra Atoll, and check out my new article for Hakai Magazine about an important new study of this unexploited population.
- Follow Erin Dillon, a UC Santa Barbara Ph.D. student, on twitter!
- Derelict Fishing Gear and the Death of Chesapeake Bay Blue Crabs. From the NOAA Response and Restoration blog
- Growth spurts may determine a lamprey’s sex. By Erin Ross, for Scientific American.
Cuttings (short and sweet):
- Watch thousands of blacktip and spinner sharks close to Florida beaches, courtesy FAU Elasmolab.
- Follow Madeline Cashion, a UBC Marine Conservation Ecology graduate student, on twitter!
- New research shows that fish may evolve rapidly to take advantage of marine protected areas. By Randy Shore, for the Vancouver Sun.
An Australian research expedition has successfully deployed three satellite telemetry tags on sawsharks for the first time! These rarely-seen sharks have a toothy rostrum similar to a sawfish, but are true sharks while sawfish are rays. Sawshark rostrums also have sensory barbels, unlike the rostrums of sawfish. “This is actually a good example of convergent evolution where two distantly related species have adaptations that have converged to be very similar in looks and (purportedly) function,”said professor Jane Williamson, the head of the Marine Ecology Group at Macquarie University and the leader of this expedition. “Sawsharks probably use their rostrum in a similar manner to sawfish: as a tool for sensing and capturing prey, and possibly for self-defense.”
Read More “Scientists deploy satellite tags on rarely studied sawsharks for the first time” »
Shark wildlife tourism* is a growing marine industry with big implications for shark conservation. While there are many competing definitions, generally shark wildlife tourism refers to SCUBA dive operators who offer trips that guarantee that you’ll see sharks, often through the use of bait or chum to attract sharks to the divers. This has become a contentious issue in marine science and conservation circles. That’s why last week’s news that WWF, Project AWARE, and the Manta Trust released the first-ever guide to responsible shark and ray tourism best practices is so welcome. This thorough and well-researched guide guide is designed for dive operators who want to minimize their potential harm to sharks and rays while maximizing the potential conservation benefits of shark wildlife tourism.
Cuttings (short and sweet):
- Watch this whale shark suck fish out of a net in Indonesia, video from Conservation International
- Follow #2017MMM, March Mammal Madness, and read my story about it from American Scientist.
- The fish that hunts with flashlights embedded in its face. By Jason Bittel, for Hakai Magazine.
Cuttings (short and sweet):
- Watch this school of hammerheads swim! Video by Earth Touch.
- Follow seahorse conservation biologist Lindsay Aylesworth on twitter!
- 147 individual great white sharks were spotted off Cape Cod last year. By Steve Annear, for the Boston Globe.
- Tips for planning an environmentally-friendly vacation. By Shivani Vora, for the New York Times.
The lesser electric ray, a small sand-dwelling ray that lives from North Carolina to Brazil, has been considered one of the most endangered marine fish on Earth. A 2005 paper reported that 98% of these rays had been wiped out, a decline attributed to shrimp trawling bycatch. This paper resulted in these animals getting classified as IUCN Red List “Critically Endangered,” the highest risk category for any species that is still found in the wild.
A new paper published today in the journal Endangered Species Research shows that these rays are in much better shape than previously believed. “There is no evidence of a decline in the relative abundance of lesser electric rays,” said Dr. John Carlson, a NOAA Fisheries Service Research Biologist and lead author of the new paper.
Read More “Rumors of the lesser electric ray’s demise have been greatly exaggerated” »
Cuttings (short and sweet):
- Watch this shark walk across a reef during low tide, from the BBC Shark special!
- Follow the JCU Seagrass Ecology Lab on twitter!
- Bring out your dead: donation of fish carcasses helps the community. By Henry Hershey, for the Fisheries Blog
Read More “Thursday Afternoon Dredging: February 23rd, 2017” »