shark fishing – Southern Fried Science

My comments on New York’s proposed new shark fishing regulations

August 14, 2023January 4, 2024 David Shiffman

Following a growing problem of mishandling of species of conservation concern, New York’s Department of Environmental Conservation is proposing some new shark fishing regulations. Here is the text of the letter I sent them supporting some of those proposed regulations, and proposing additional regulations. A dead sand tiger shark washed up on a New York … Read More “My comments on New York’s proposed new shark fishing regulations” »

New paper: What happened to the world’s first certified sustainable shark fishery?

June 26, 2023 David Shiffman

Conservation, Science

In 2011, the world’s first fishery for sharks was certified as sustainable by the Marine Stewardship Council*. The British Columbia spiny dogfish fishery made major news in fisheries management and ocean conservation world, where the possible existence of sustainable shark fisheries has been debated intensely. A few years later, the fishery voluntarily withdrew their certification, and never publicly said why.

I wanted to know what happened with this scientific mystery. So, with the help of Chuck Bangley and Catherine Macdonald and funding support from the Liber Ero Postdoctoral Fellowship program, I organized a research expedition to find out. The results of our expedition can be found in our new paper (LINK,) (OPEN ACCESS AUTHOR COPY) but in this blog post, I’d like to explain what we did, what we found, and why we think it’s important.

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

October 18, 2018 David Shiffman

Uncategorized

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 … Read More “Ancient fish farming and popular invasive species: Thursday Afternoon Dredging, October 18th 2018” »

Background information on our land-based shark fishing paper

August 15, 2017August 15, 2017 David Shiffman 5 Comments

Science

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.

April 24, 2014May 5, 2014 David Shiffman 18 Comments

Conservation, Science

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.

Social media as a scientific research tool: Background info for my #scio14 session

February 6, 2014February 6, 2014 David Shiffman 1 Comment

Blogging, Science

At the 2014 ScienceOnlineTogether conference, I will be moderating a session focusing on how to use social media as a scientific research tool (2:30 P.M. on Friday, February 28th in room 3). The hashtag is #ScioResearch , so be sure to follow along, and I’ll make a Storify afterwards. This post is primarily intended to be a source of background information for participants in my session, though feel free to read, share and ask questions in the comments if you are not planning on participating in my session.

ScienceOnline community members understand the value of social media for collaborating with colleagues and communicating science to the public, but few think of the incredible resource that these tools are for scientific research. Hundreds of millions of people all over the world are constantly sharing their experiences and opinions in a format that is public, archived, searchable, and accessible, giving researchers access to this enormous dataset without the expense or logisitical difficulties involved in organizing a large-scale survey or series of focus groups. To use a technical term, for many types of scientific research, social media and “big data” is what is called “a freakin’ gold mine.”

Below are a few examples of how social media can be used for scientific research.

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

November 7, 2013November 7, 2013 David Shiffman 1 Comment

Conservation, Science

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

March 1, 2013March 1, 2013 David Shiffman 10 Comments

Conservation, Science

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

March 28, 2012March 28, 2012 David Shiffman 3 Comments

Uncategorized

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 … Read More “Book review: man and shark” »