David Shiffman

A guide to following shark and ray conservation at this week’s Convention on Migratory Species meeting

November 4, 2014November 4, 2014 David Shiffman

This week, the Convention on the Conservation of Migratory Species of Wild Animals (CMS) will have its 11th Conference of the Parties in Quito, Ecuador. While less well-known than the Convention on International Trade in Endangered Species (CITES,) CMS is another very important international wildlife conservation treaty. As the name suggests, it focuses on the conservation of species that migrate across national political borders. This meeting includes several proposals for listing species of sharks and rays on the CMS Appendices. In fact, most of the proposals are for elasmobranchs this time.

How does CMS work?

Like CITES, CMS allows member states to propose listing of threatened species on different appendices, which have different levels of protection. Appendix I obligates strict protection of that species by member states, where appendix II encourages member states to cooperate in the management of that species through regional or global agreements. Currently, basking sharks, great white sharks, and oceanic mantas are listed on appendix I, and whale sharks, makos, porbeagles, and northern hemisphere spiny dogfish are listed on Appendix II. There are also non-binding “memoranda of understanding,” such as the 2010 MOU on migratory sharks. As of May of this year, CMS has 120 parties. This paper by Holly Edwards is a good introduction to how it all works.

What exactly does listing do for a species?

The specific actions required to follow up on these listings are basically up to the CMS parties themselves, and the required actions are not particularly clear for Appendix II. Mako sharks were listed on CMS Appendix II in 2008, for example, and they don’t yet have internationally agreed-upon catch limits. Appendix I listings for basking sharks helped lead to European Union fishing prohibitions for these species, though.

Shark and ray conservation proposals

There are a series of shark and ray conservation proposals listed for the CMS 2014 conference of the parties. These include Appendix II listings for hammerhead sharks (great and scalloped), thresher sharks (all three species), and silky sharks, as well as listings on Appendix I and II for reef manta rays, all 9 species of mobula rays, and all species of sawfish. Project AWARE, Shark Advocates International, Defenders of Wildlife, Humane Society International, Shark Trust, and the International Fund for Animal Welfare have produced some fact sheets and the Pew Environment Group has summaries of each of these proposals except the sawfish ones. The shark and ray proposals are expected to be introduced and debated Thursday morning, but we will likely not know the outcome until next Monday.

How do I follow along?

The main meeting hashtag is #CMSCoP11 (Convention on Migratory Species 11th conference of the parties), but also check out #SharksWithoutBorders and #Time4Action .

Additionally, representatives from variety of environmental non-profits will be attending the conference of the parties and/or tweeting updates. Here is an incomplete list:

Progress: It’s now only legal to remove fins at sea for one shark species in the United States

November 3, 2014November 3, 2014 David Shiffman

Conservation, Science

Shark finning, the process of removing shark fins at sea and dumping the rest of the body, is nearly universally opposed by conservation activists, scientific researchers and fisheries managers. In addition to being potentially inhumane (the shark is often still alive when dumped overboard,) this processing method is exceptionally wasteful and makes it very difficult for fisheries managers to get accurate species-specific catch data.

There are severals ways to stop shark finning. One is to ban fishing for sharks entirely, fins of sharks can’t be removed at sea if sharks aren’t caught in the first place. It is important to note that some well-intentioned activists use “stop shark finning” as a synonym for “stop shark fishing of any kind,” but that is unequivocally not what shark finning is and not what finning bans accomplish. The second method is through the use of fin to carcass ratios. Under these policies, fisherman can remove the fins of sharks at sea as long as the total weight of fins landed does not exceed a certain percentage (usually 3.5 to 5%) of the total weight of carcasses landed. This can still leave room for some undetected finning (these ratios vary by species and fin removal method) and still makes it difficult for managers to know how many of each species are being caught (sharks are more readily identifiable when their fins are intact). Finally, a method growing in popularity in recent years, which is generally considered to be a best practice of shark fisheries management, is the requirement of landing all caught sharks with “fins naturally attached.”

More large sharks were killed by recreational anglers than commercial fishermen in the U.S. last year

October 29, 2014October 29, 2014 David Shiffman 2 Comments

Conservation, Science

The United States National Marine Fisheries Service just released the 2013 “fisheries of the United States” report. The extremely detailed report contains lots of important information on both recreational and commercial fisheries in U.S. waters, and I recommend giving it a thorough read. I noticed an interesting detail about the U.S. shark fishery, though. In 2013, more large (non-dogfish) sharks were landed by U.S. recreational shark anglers (~4.5 million pounds) than by U.S. commercial shark fishermen (~3 million pounds). This was not the case in 2012.

Save the National Ocean Sciences Bowl!

October 15, 2014October 20, 2014 David Shiffman 2 Comments

Blogging

The National Ocean Sciences Bowl is a competition for high school students focused on marine biology, physics and chemistry . Through cooperation between researchers, teachers and community members, NOSB aims to educate students and their families about science and sustainable stewardship of ocean resources. Thousands of the smartest high school students in the United States from hundreds of schools participate each year. Thorough evaluations of the program’s results show that educators and parents who participate as coaches gain leadership and teaching skills, students who compete further improve their knowledge of science, and everyone involved learns about why the ocean is important. By any measure, the National Ocean Sciences Bowl has been an unqualified success.

Unfortunately, as revealed in a Science News article this week, NOSB’s continued existence is threatened by budget cuts. Some of the regional bowls that provide contestants for the national competition have been cancelled, or are no longer held annually. Cuts are hitting those regional catering to geographic and demographic communities under-represented in the marine sciences particularly hard. “The NOSB is one of the ways we get students from rural Alaska involved in ocean science,” says Dr. Leslie Cornick, chair of the Environmental Sciences department at Alaska Pacific University. “It would be a real blow to the state for it to disappear.”

Many marine scientists credit NOSB with setting them on their current career path. “NOSB made me more passionate about chemistry, oceanography, and geology; whereas before I joined the team I believed biology would be the only science I could ever enjoy,” said Hannah Benton, a marine science major at the College of Charleston. “If we can’t provide these kinds of opportunities for students today then we risk losing future would-be scientists who haven’t yet realized their true passion.”

Watch the Sharks International 2014 Keynote Presentations!

September 23, 2014 David Shiffman 2 Comments

Science

In June of 2014, almost 400 of the world’s top shark researchers gathered in Durban, South Africa for the 2nd Sharks International conference. The four keynote presentations have just been put online.

Beyond Jaws: Rediscovering the “lost sharks” of South Africa

Dave Ebert, Moss Landing Marine Laboratory

Biography:Dave Ebert earned his Masters Degree at Moss Landing Marine Labs and his Ph.D. at Rhodes University, Grahamstown, South Africa. He is currently the Program Director for the Pacific Shark Research Center, a research faculty member at Moss Landing Marine Laboratories, and an honorary research associate for the South African Institute for Aquatic Biodiversity and the California Academy of Sciences Department of Ichthyology. He has been researching chondrichthyans around the world for nearly three decades, focusing his research on the biology, ecology and systematics of this enigmatic fish group. He has authored 13 books, including a popular field guide to the sharks of the world and most recently he revised the Food and Agriculture Organization’s Catalogue of Sharks of the World. He has published over 300 scientific papers and book chapters, and contributed approximately 100 IUCN Shark Specialist Group Red List species assessments. Dave is regional co-Chair of the IUCN Northeast Pacific Regional Shark Specialist Group, Vice Chair for taxonomy, and a member of the American Elasmobranch Society and Oceania Chondrichthyan Society. He has supervised more than 30 graduate students, and enjoys mentoring and helping develop aspiring marine biologists.

Sharks aren’t always the top of the food chain

September 3, 2014 David Shiffman 1 Comment

Blogging, Science

Most people think of sharks as being apex predators, large, fearsome hunters sitting right at the top of the ocean food chain. Of course, that isn’t always the case. There are more than 500 known species of sharks, and they vary in size from the size of a pencil to the size of a school bus. In many cases, there’s a larger predator in their environment, which can lead to some surprising and amazing interactions.

A crocodile ate a bull shark

Brutus, a famous crocodile in Australia, was recently photographed eating a juvenile bull shark. Southern Fried Science writer Sarah Keartes has the full story at EarthTouch.

Shark Week 2014: documentary reviews, tweets, and media coverage

August 26, 2014 David Shiffman 3 Comments

Blogging, Popular Culture, Reviews and Interviews, Science

Another Shark Week has come and gone, and despite being out of the country at the time, I’ve managed to keep up my record of never having missed a single Shark Week documentary. I gotta tell you, though, some of them are really hard to watch. While there there is undoubtedly some great educational programming focusing on science, natural history and conservation, the Discovery Channel is doubling down on the troubling recent trend of blatantly lying to viewers with fake documentaries that use actor playing scientists and CGI video. In a time when public misunderstanding and distrust of science and scientists is already high, the Discovery Channel has decided to actively perpetuate misunderstanding and distrust of science and scientists. I’ve included my reviews (which originally were posted on my Facebook page after each show) of each of the documentaries below, along with a link to the Storify of my twitter reactions and links to some of the media coverage.

Upwell held another successful Sharkinar, bringing together scientists, conservationists, communicators and educators to talk about how “Team Ocean” can best take advantage of the increased public interest in sharks during Shark Week. Indeed, many members of Team Ocean were able to use the temporary increase in public interest in sharks to get important messages out to the media, and I’ve linked to and summarized some of the best examples below, but imagine how much more effective we could be if we didn’t have to first debunk the lies aired on a supposedly educational non-fiction television channel?

Background information on our “trophy fishing for species threatened with extinction” paper

August 11, 2014September 4, 2014 David Shiffman

Conservation, Science

A giant pangasius, one of the Endangered species of fish that is targeted by trophy fishermen. Photo by user GV_Fishing, WikiMedia Commons

Andrew and I (along with several co-authors) have a new paper out in the journal Marine Policy entitled “Trophy Fishing for Species Threatened with Extinction: A way Forward Based on a History of Conservation.” You can read the paper here, and view the official press release here (will be up soon) .

We believe that this is an important topic that does not get enough attention, and we wrote the paper to review the scope of the problem, propose an easily achievable solution, and facilitate a long overdue discussion. Although we intentionally wrote the paper to be accessible to anyone, this blog post serves to explain the concepts and issues in the paper even further. We are happy to answer any questions people have about the paper, just ask them in the comments section below.

Megalodon: the New Evidence is a fake documentary

August 7, 2014 David Shiffman 3 Comments

Blogging, Popular Culture, Science

So was last year’s “Megalodon: the monster shark lives.” Both Shark Week specials claim to show evidence that Carcharocles megalodon, the largest predatory shark that ever lived, is still alive. In both cases, the evidence is 100% completely and totally fake. A disclaimer from “the monster shark lives” Video evidence is CGI, images are photoshopped, and … Read More “Megalodon: the New Evidence is a fake documentary” »

Cascading planetary-wide ecosystem effects of the extirpation of apex predatory Krayt dragons on Tatooine

July 22, 2014 David Shiffman

Blogging, Conservation, Popular Culture, Science

Author’s note: this post is part of the “Science of Tatooine” blog carnival. Though obviously about science fiction and not the real world, it includes real ecological theories, and it uses some real peer-reviewed scientific papers as references. Whenever possible, I’ve linked to accessible copies of those papers and explainers of these ecological terms. Many of the same issues are associated with shark population declines.

ABSTRACT

Predators play an important role in structuring ecosystems, with predator population declines being linked to a variety of negative ecological effects. Here, we present evidence that the planet Tatooine, famous throughout the Galaxy for being a desert planet, experienced desertification as a result of unintended changes in herbivore populations caused by the intentional large-scale killing of apex predators by offworld colonists. Fossil evidence and interviews showing traditional ecological knowledge suggest that once-abundant Krayt dragons were hunted to near extinction by early human colonists. As a result of the decline in predation, populations of large herbivorous banthas populations grew out of control and overgrazed the plants once found throughout Tatooine.

INTRODUCTION

Studies of numerous ecosystems have consistently shown the importance of intact populations predators to healthy ecosystems, with a recent review (Estes et al. 2011 “trophic downgrading of planet Earth”) noting that “the loss of apex consumers is arguably humankind’s most pervasive influence on the natural world.” Population declines of top predators can cause a trophic cascade, resulting in unintended consequences that ripple through a food chain. Sea otter population declines in the Pacific Northwest of the United States resulted in predation release of otter prey (sea urchins), and an overabundance of sea urchins destroyed entire kelp forest ecosystems by overgrazing (Estes et al. 1998 “killer whale predation on sea otters linking oceanic and nearshore systems.) Wolf population declines in Yellowstone National Park resulted in predation release of wolf prey (elk,) and an overabundance of elk destroyed aspen pine forests by overgrazing (Ripple et al. 2011 “trophic cascades among wolves, elk, and aspen on Yellowstone National Park’s northern range.”) Ecosystem-wide effects stemming from the loss of predators has also been listed as the proximate cause of disease outbreaks (Pongsiri et al. 2009 “biodiversity loss affects global disease ecology,”), increasing destructive wildfires (Perrings et al. 1997 “biodiversity resilience and the control of ecological-economic systems: the case of fire-driven rangelands,”) and overall biodiversity loss (Paine 1969, “Pisaster-tegular interaction: prey patches, predator food preference, and intertidal community structure.”)

Though the planet Tatooine in the Tatoo system of the Outer Rim is known by researchers to have once been covered by oceans and lush vegetation, it is commonly known now as a desert planet (source). While it is famous in Republic circles primarily for being the home of Jedi Master Skywalker, Tatooine also has native sentient species, including Jawas and Tusken Raiders (the latter are derisively referred to by locals as “sand people” ). Native non-sentient animals include banthas (large herbivores used as beasts of burden) and the now mostly extinct Krayt dragon (a large predatory species that fed on banthas).