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Author: David Shiffman

An open letter to the Florida Fish and Wildlife Conservation Commission on revising land-based recreational shark fishing regulations

Posted on April 17, 2018 By David Shiffman
Conservation, Science

Note: The Florida Fish and Wildlife Conservation Commission (FWC) is holding a public meeting on April 25th which will include the issue of land-based recreational shark fishing. Part of my dissertation research focused on this topic, so I am submitting expert testimony, but since I no longer live in Florida I am submitting it remotely. I am sharing my testimony here. Anyone else who is interested in attending the meeting in person (Fort Lauderdale Marriott on April 25th), or submitting testimony remotely, is free to quote my talking points below if the appropriate references are cited. 

Dear Chair Rivard, Vice Chair Spottswood, Commissioner Kellam, Commissioner Lester, Commissioner Nicklaus, Commissioner Rood, and Commissioner Sole of the Florida Fish and Wildlife Conservation Commission (FWC),

My name is Dr. David Shiffman, and I studied land-based shark fishing in Florida as part of my Ph.D. dissertation at the University of Miami’s Abess Center for Ecosystem Science and Policy. This research was published in the peer-reviewed scientific journal Fisheries Research (here’s a link to an open access copy) and covered in major media outlets including National Geographic, Nature, and the Miami Herald. Accordingly, I would like to provide expert testimony for your April 25th public hearing on this topic. Since I no longer reside in Florida I am submitting this testimony remotely. As a conservation biologist who spent years studying harmful practices among some elements of the land-based Florida shark fishing community, I am grateful to see FWC holding a public meeting that includes this important issue, and I am grateful for the opportunity to contribute.

Overall, the scientific evidence is clear and overwhelming that while many anglers are rule-following and conservation-minded, many common land-based shark fishing practices represent a significant conservation threat to threatened, protected shark species in Florida. Additionally, the evidence is clear and overwhelming that in many cases anglers are breaking existing laws and regulations, and that in some of those cases the anglers are aware that they are breaking the law and are explicitly stating that they don’t care. Finally, the evidence is clear and overwhelming that many of the arguments put forward by land-based anglers in support of the status quo are not argued in good faith, and are intentionally crafted to misrepresent the facts of the situation.

It is obvious to me, and to many expert colleagues with whom I have discussed this issue, that the FWC can and must do more to protect threatened sharks, building off of early successes that made Florida a leader in shark conservation. Specifically, the FWC can and must do more to regulate these harmful practices, enforce clear violations of existing regulations, and educate anglers about these issues. Below I will elaborate on each of these points and propose specific regulatory, enforcement, and public education changes that can be made to protect sharks without significantly infringing on anyone’s rights. I will also counter several common arguments that are put forth by bad actors in the recreational angling community.

Read More “An open letter to the Florida Fish and Wildlife Conservation Commission on revising land-based recreational shark fishing regulations” »

Sea monsters and saving kelp: Thursday Afternoon Dredging, April 12, 2018

Posted on April 12, 2018April 11, 2018 By David Shiffman 1 Comment on Sea monsters and saving kelp: Thursday Afternoon Dredging, April 12, 2018
Uncategorized

Cuttings (short and sweet):  Follow graduate student Justine Hudson, who studies arctic marine mammals, on twitter. Prehistoric “sea monster” could be largest that ever lived. By John Pickrell, for National Geographic. Right whales think before they speak. By Jason Goldman, for Scientific American. UK could create 5,000 jobs by improving seafood sustainability. By Fiona Harvey, for … Read More “Sea monsters and saving kelp: Thursday Afternoon Dredging, April 12, 2018” »

Dear Shark Man, what’s the deal with those notches on shark tails?

Posted on April 11, 2018April 11, 2018 By David Shiffman
Uncategorized

Welcome to  Dear Shark Man, an advice column inspired by a ridiculous e-mail I received. You can send your questions to me via twitter (@WhySharksMatter) or e-mail (WhySharksMatter at gmail). Dear Shark Man, Why do sharks tend to have those little notches in their tail fin? Is it like an aerodynamic thing? If you were to fill … Read More “Dear Shark Man, what’s the deal with those notches on shark tails?” »

A scene-by-scene breakdown of the first trailer of “The Meg”

Posted on April 10, 2018April 10, 2018 By David Shiffman 1 Comment on A scene-by-scene breakdown of the first trailer of “The Meg”
Blogging, Popular Culture

Yesterday, the trailer for “the Meg” was released online.  This movie is based on a popular book series that claims that megalodon is actually not extinct, just hiding. (I’m in the 4th book).


I have a love-hate relationship with movies like this, by which I mean that I love them and I hate myself for loving them. While movies like “Jaws” had a measurable negative effect on public perception of sharks, I don’t believe that more obviously ridiculous movies like SharkNado have a similar effect.  Jason Statham playing a marine biologist in a movie that includes Rainn Wilson? Sign me up.

If not for the people who believe that these movies are real and therefore decide to yell at marine biologists on twitter about it, I’d be all for this.  Let’s be totally clear here- Carcharocles megalodon is extinct, and here’s how we know. Shark Week lied to you about it. Actresses from this movie asking about it are not experts. This movie is completely fictional. You can certainly watch it and enjoy it, but please don’t cite it as evidence that a 50 foot long whale-eating shark that used to live in shallow coastal waters near what are now populated areas is not extinct.

Anyway, here is a scene-by scene breakdown of what’s in the first trailer. From it, we can tell that this is an action-packed movie with a great cast that does not stick too closely to the books, and is also not particularly interested in scientific accuracy even with respect to issues unrelated to the “giant extinct animals are actually not extinct”central conceit.

Read More “A scene-by-scene breakdown of the first trailer of “The Meg”” »

Thoughts on the Sustainable Shark Fisheries and Trade Act

Posted on April 5, 2018 By David Shiffman
Conservation, Science

A few weeks ago, H.R. 5248, The Sustainable Shark Fisheries and Trade Act, was introduced into Congress. The purpose of this bill is to “encourage a science-based approach to significantly reduce the overfishing and unsustainable trade of sharks, rays and skates around the world and prevent shark finning,” according to a press release from Mote Marine Lab. 

Though the devil is always in the details, and I’ll get into those below, here is a general overview of how this would work. The Sustainable Shark Fisheries and Trade Act would direct NOAA Fisheries to evaluate the fisheries management practices of other shark and ray fishing nations. This is similar in principle to other things NOAA is already doing, and a similar role for NOAA was included in the 2010 Shark Conservation Act (but has yet to be implemented).

Nations that have sustainable fisheries management practices comparable to ours (or certain fisheries associated with those nations, even if other fisheries are less well managed) will get a formal certification of their sustainable management practices, and nothing will change for them. Nations (or fisheries) that are found to not have sustainable fisheries management practices comparable to ours will not be allowed to have those products imported into the US and sold in our markets until their management practices improve. In the meantime, they’ll have access to NOAA’s existing capacity building resources and expertise to improve their own practices.

I support much of what this bill is trying to do, but I have some significant concerns about some of the current phrasing and plan for implementation.

Read More “Thoughts on the Sustainable Shark Fisheries and Trade Act” »

Invisible squid and fish with glowing eye spikes: Thursday Afternoon Dredging, April 5th, 2018

Posted on April 5, 2018April 2, 2018 By David Shiffman
Uncategorized

Cuttings (short and sweet):  Follow Louise Chavarie, an Arctic aquatic ecologist, on twitter! A squid-skin inspired invisibility cloak. From Nature News research updates. Underwater noise pollution disturbs fish, too. From CBC News. NOAA publishes list of global fisheries and their risks to marine mammals. By John Cannon, for MongaBay Antarctic ice melting faster than thought. By … Read More “Invisible squid and fish with glowing eye spikes: Thursday Afternoon Dredging, April 5th, 2018” »

Giant whales and collapsing cod stocks: Thursday Afternoon Dredging, March 29th, 2018

Posted on March 29, 2018 By David Shiffman
Uncategorized

Cuttings (short and sweet):  Follow shark and ray biologist Jeremy Vaudo on twitter! Science may have a reason why whales get so big. By Carrie Arnold, for National Geographic. Paleo profile: The fish from China. By Brian Switek, for Scientific American. Mass stranding in Australia claims 130 whales. Video, for the Guardian. Spoils (long reads and … Read More “Giant whales and collapsing cod stocks: Thursday Afternoon Dredging, March 29th, 2018” »

Migrating mullet and expanding garbage patches: Thursday Afternoon Dredging, March 22, 2018

Posted on March 22, 2018 By David Shiffman
Uncategorized

Cuttings (short and sweet):  Follow science illustrator Bethann Garramon Merkle on twitter! Great Pacific Garbage Patch is sprawling with more debris than thought. By Oliver Milman, for the Guardian. In Bali fish die-off, a human hand is suspected. By Luh De Suriyana, for MongaBay. Spoils (long reads and deep dives): Mullet Mania. By Michael Patrick O’Neill, … Read More “Migrating mullet and expanding garbage patches: Thursday Afternoon Dredging, March 22, 2018” »

In South Louisiana, Seafood Means Hope

Posted on March 19, 2018April 20, 2018 By David Shiffman
Science

This blog post and photo slideshow was created during OCEANDOTCOMM, an ocean science communication event, and supported by the Louisiana Universities Marine Consortium (LUMCON) The theme of OCEANDOTCOMM was Coastal Optimism. Photos were contributed by our lead photographer, Rafeed Hussain/Ocean Conservancy, with additions from other OCEANDOTCOMM attendees, including Melissa Miller, Samantha Oester, Susan Von Thun, Solomon David, Rebecca Helm, and Alexander Havens.

A sign at the Bait House in Chauvin, Louisiana. Photo by Rafeed Hussain / Ocean Conservancy

In many ways, South Louisiana is seafood- a trip here isn’t complete without eating some gumbo, oysters, or crawfish. Only one state (Alaska) lands more seafood than Louisiana’s 1.2 billion pounds a year (as of 2016). As of 2008, one in 70 jobs in the whole state is tied to fishing or related industries. According to the Louisiana Seafood Marketing and Promotion Board, “when you choose Louisiana seafood, you’re ensuring that your purchase benefits an American community and a way of life.”

When we visited Terrebonne Parish, home to nearly 20 percent of all commercial fishing license holders in Louisiana, we found that fishing means more to the people of this community than food and jobs. Here in South Louisiana, fishing is a vital part of the vibrant local culture and community pride. In a region that’s been devastated by hurricanes and oil spills, fishing is also a source of something more important: hope.

Below, you’ll hear what fishing means to South Louisiana’s fishing communities through the voices of a former shrimper, the owner of a grocery store that has served the town of Chauvin for more than a century, and representatives of a local Native American tribe. You’ll also get a glimpse into this beautiful part of the world through a photo slideshow. Together, this paints a picture of communities that have overcome unimaginable struggle, but still look forward to the future, in no small part because of the riches of the sea.

Read More “In South Louisiana, Seafood Means Hope” »

Endangered turtles and fish venom: Thursday Afternoon Dredging, March 15, 2018

Posted on March 15, 2018March 13, 2018 By David Shiffman
Uncategorized

Cuttings (short and sweet):  Follow marine conservation biologist Julia Spaet on twitter! Nearly half of freshwater turtles are at risk of extinction. By John Platt, for Revelator. Fishing bots “going dark” raise suspicion of illegal fishing. By Scott Neuman, for NPR. Ocean sensors can track progress on climate goals. By Joellen Russell, for Nature News. Spoils (long … Read More “Endangered turtles and fish venom: Thursday Afternoon Dredging, March 15, 2018” »

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