shark fishing | Southern Fried Science

Ancient fish farming and popular invasive species: Thursday Afternoon Dredging, October 18th 2018

Posted on October 18, 2018 by David Shiffman

Cuttings (short and sweet):

Follow everyone in this amazing thread of twitter wildlife biologists started by David Steen.
Ancient Egyptians farmed fish thousands of years ago. By the New Arab. This is a neat story about a new archaeological study, which tells us about ancient humans’ relationship with the sea.
Fun fish festivals around the world. By Dana Sackett, for the Fisheries Blog.
Drug trafficking at sea is devastating island states, ministers say. By Karen McVeigh, for the Guardian.

Spoils (long reads and deep dives):

What Happens When Humans Fall In Love With An Invasive Species? By Maggie Koerth-Baker, for 538. This is a really excellent long read about the cultural impacts of invasive species, and how they’re not always considered to be bad.
Herschel, the Very Hungry Sea Lion. By Katharine Gammon, for Hakai. This great story is all about how humans wrongly blame marine predators for our own overfishing.
Will Americans Embrace A Zeal For Eel? This Maine Entrepreneur Hopes So. By Fred Bever, for NPR.
Finding home, magnetically. From ScienceFriday.
Scientists map the impact of trawling using satellite vessel tracking. By John Cannon, for MongaBay
Scientists catch rare glimpses of endangered vaquita. By Elisabeth Malkin, for the New York Times.
The internet of animals that could help to save vanishing wildlife. By Andrew Curry, for Nature
And don’t forget to check out my first-ever op ed, about shark fishing in Florida

Please add your own cuttings and spoils in the comments!

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Background information on our land-based shark fishing paper

Posted on August 15, 2017 by David Shiffman

A photo used in this study showing a hammerhead shark taken completely out of the water. As with all photos used in this study, the angler’s privacy has been protecting by blurring out his face.

I have a new paper out on the conservation impacts of recreational shark fishing. The paper is called “fishing practices and representations of shark conservation issues among users of a land-based shark angling online forum,” and it is published in the journal Fisheries Research. If you don’t have institutional library access, you can read a copy of the paper here. The goal of this blog post is to provide background information on the study.

Journalists are free to quote or paraphrase information from this blog post. Additionally, I provide some suggested quotes below, and I am available for interviews about this paper (please contact me at WhySharksMatter at gmail).

It’s illegal for anglers to land hammerheads in Florida. It’s time that media coverage pointed that out.

Posted on April 24, 2014 by David Shiffman

On January 1st, 2012, new Florida Fish and Wildlife Conservation Commission regulations came into effect, making it illegal for fishermen to land great, smooth, or scalloped hammerhead sharks in Florida waters. The legal term “land” is clearly defined in the Florida Code:

“Land,” when used in connection with the harvest of marine organisms, means the physical act of bringing the harvested organism ashore”

“Harvest” means the catching or taking of a marine organism by any means whatsoever, followed by a reduction of such organism to possession. Marine organisms that are caught but immediately returned to the water free, alive, and unharmed are not harvested”

Florida code section 68B-44 (emphasis mine)

In other words, if a fish is brought out of the water, it is “landed”. If anglers stop the act of releasing a fish to measure it or take a photo, it is not “immediately released.” If a fish isn’t “immediately returned alive and unharmed” (and if the extremely physiologically stressful act of bringing a hammerhead out of the water results in it dying after release, it was not released “unharmed,”) it is harvested. If you drag the shark out of the water and leave it there until it stops moving long enough that you feel safe to approach it, that is not an “immediately released” animal, and it isn’t an animal that is “released unharmed.” Landing and/or harvesting hammerhead sharks is illegal. This is clear under the law, and has been confirmed by numerous consultations with an FWC Law Enforcement official.

10 components of a sustainable shark fishery, and how you can help implement them

Posted on November 7, 2013 by David Shiffman

In 1999, government officials from all over the world gathered in Rome for a meeting of the United Nations Food and Agricultural Organization’s Committee on Fisheries. The Committee meets every two years, but one of the numerous outputs of this meeting was particularly significant, at least for sharks. Based on years of consultation and discussion by experts, the group agreed on a formal set of general principles that should make up sustainable and well-managed shark fisheries.

These 10 principles, part of a larger International Plan of Action for Sharks (IPOA-Sharks) , have helped shape more than a decade of scientific research and management priorities for the chondrichthyan fishes. When properly implemented and enforced, they allow people to use sharks (and rays and skates and chimeras, included in the IPOA-Sharks definition of “sharks”) as a natural resource while keeping populations healthy and allowing depleted stocks to recover.

According to the IPOA-Sharks, a national shark plan should aim to:

Breaking News! “Most Comprehensive Estimate of Mortality”: Between 63 and 273 Million Sharks Killed Each Year

Posted on March 1, 2013 by David Shiffman

A new study* has estimated that the total number of sharks killed by fisheries each year is between 63 and 273 million, with a average of approximately 100 million.In an interview, lead author Dr. Boris Worm explains the importance of this estimate:

“This is by far the most comprehensive estimate of shark mortality yet,” he said, “because we consider all sources of mortality, from direct fishing, finning, and discard mortality. the estimate was derived by crunching numbers from almost 100 publications on the catches and mortality of sharks.”

Of all the numbers this team crunched, the most important thing to consider is whether the exploitation rate is greater than the rebound rate. In other words, is this level of exploitation more than the populations can recover from? Though many estimates and approximations went into calculating these figures, it seems quite clear that sharks are being harvested at an unsustainable rate.

Book review: man and shark

Posted on March 28, 2012 by David Shiffman

If a picture is worth a thousand words, than Man and Shark is a must for anyone interested in shark fisheries and conservation issues. This book by Alex Hofford and Paul Hilton features a collection of incredible photographs of sharks and shark fishing from all over the planet, from the fishing ports of the developing world to the markets of Asia and the kitchens and restaurants where shark fin soup is prepared and served. The list of 14 contributing conservation photographers features some of the world’s best.

Each chapter features a brief introduction (in both English and Mandarin Chinese) explaining key points about shark biology or conservation, followed by a series of stunning, and in some cases horrifying, photos which showcase both the diversity of living sharks and the global industrial scale of shark fisheries. Photos of finned sharks lying on the seabed paired with interviews from fisheries biologists and conservationists gets the message across concisely, directly and effectively.

Man and Shark is a passionate call for humans to change our relationship with the oceans, and I commend Paul and Alex for their excellent contribution to the world of shark conservation.