David Shiffman

Shark Science Monday: the Known Unknowns of Shark Conservation

October 31, 2011December 9, 2011 David Shiffman 7 Comments

Science

“There are known knowns; there are things we know we know. We also know there are known unknowns, that is to say we know there are some things we do not know. But there are also unknown unknowns – the ones we don’t know we don’t know.” – Former U.S. Secretary of Defense Donald Rumsfeld.

As nature documentary viewers often hear, there is a lot about sharks and rays that scientists don’t know… but what are the most important things that we need to know? A new paper written by Colin Simpfendorfer, Will White, and former Shark Science Monday interview subjects Michelle Heupel and Nick Dulvy attempts to identify these “known unknowns” of shark and ray conservation. “The importance of research and public opinion to conservation management of sharks and rays: a synthesis”, which arose out of the 2010 Sharks International conference, is the most complete record ever created of the research questions that we need to answer in order to better conserve and manage these animals. For young shark researchers eager to work on projects with practical conservation importance, this paper is a great place to start looking for ideas. Additionally, future published work that claims to be important for conservation and management would do well to cite it, and anyone interested in this subject should read it.

Do environmental regulations harm the economy?

October 28, 2011October 31, 2011 David Shiffman 7 Comments

Conservation

OLYMPUS DIGITAL CAMERA — Image courtesy SlopeMedia.org

One of the main themes of the Republican Presidential primary campaign has been that government regulations- specifically, regulations designed to protect the environment and public health from industrial pollution- is damaging to the economy. Nearly all of the Republican Presidential candidates have expressed this view: Rick Perry wants to “lock the doors and turn off the lights” at EPA headquarters, Michelle Bachmann thinks it should be called the “job-killing organization of America“, and both Newt Gingrich and Herman Cain want to abolish the agency entirely.

Is there any truth to the idea that environmental regulations cost jobs and are slowing the economic recovery? On it’s face, the idea makes sense. A business has a finite amount of money, and the more money they have to spend on complying with environmental regulations, the less money they can spend on hiring workers. If a business has to pay for new technology to reduce the amount of pollution their manufacturing process produces, the money spent on that technology is money that can’t be spent on new workers. The real question, though, is not whether there are costs to environmental regulations- there obviously are, and they can sometimes be quite high to particular industries. The real question is whether the benefits of these environmental regulations outweigh the costs.

Western Australia’s sharks need your help!

October 23, 2011 David Shiffman 14 Comments

Conservation, Science

great-white-shark_559_600x450 — Great White Shark. Image courtesy animals.NationalGeographic.com

Last week, I wrote about three current shark conservation issues, including a proposed shark cull in Western Australia. Barbara Wueringer was able to deliver her letter to Western Australian government officials on Friday, and thanks to your help, it was signed by more than 100 scientists and conservationists from all over the world.

Yesterday, however, another swimmer was killed by a shark in Western Australian waters. George Thomas Wainwright, 32, was a native of Texas who had been working on a boat in Australia. This attack, which is the third in the last two months, has resulted in renewed calls for a “shark cull”. The proposed plan would involve both an attempt to kill the specific shark responsible for killing Mr. Wainwright and a more general killing of all the sharks in the area. It is believed that the shark that killed Mr. Wainwright was a great white shark, also known as a “white pointer” in Australia.

RJD Twitter teach-ins start Monday at 1 with overfishing

October 21, 2011 David Shiffman 3 Comments

Science

My lab, the RJ Dunlap Marine Conservation Program at the University of Miami, will be hosting a series of Twitter teach-ins on marine biology and conservation topics. Each teach-in will cover a topic in a series of Tweets, including links to photos and videos, as well as NGO reports, blog posts, and scientific papers which people … Read More “RJD Twitter teach-ins start Monday at 1 with overfishing” »

Culling, bycatch, and loopholes: three shark conservation petitions need your signatures!

October 19, 2011October 27, 2011 David Shiffman 9 Comments

Conservation

While we can all celebrate the recent passage of California’s shark fin ban, sharks still need your help! The government of Western Australia is planning a “shark cull”, intentionally killing large numbers of threatened species to reduce the probability of shark attacks. The Marine Stewardship Council is considering granting “sustainable” status to a fishery with huge shark bycatch issues (an issue we originally covered last year). The European Union, one of the largest shark fishing entities in the world, still has large loopholes in their shark fishing policy. In the past few weeks, I’ve been contacted by conservation organizations working on these issues, and they need our help! Please consider signing the petitions listed below, and please consider telling interested friends and colleagues. As I’ve written many times before here on Southern Fried Science, I don’t support just any petition, but these are all from legitimate people and organizations and I have chosen to sign all three.

Securing the Conservation of Sharks and Rays

October 10, 2011October 9, 2011 David Shiffman 5 Comments

Conservation, Science

At the 2nd International Marine Conservation Congress, Dr. Nick Dulvy and the IUCN Shark Specialist Group organized a special symposium called “Securing the Conservation of Sharks and Rays”. This symposium featured leading scientists, international policy experts, the founder of a creative non-profit, a National Geographic conservation photographer… and me. It was, without a doubt, the greatest professional honor of my (admittedly brief so far) career.

Misunderstood Marine Life #2 – moray eels

October 7, 2011October 7, 2011 David Shiffman

Uncategorized

greenmoray3 — Image courtesy ReefGuide.org

Since they are typically observed hiding in dark crevices while opening and closing their mouths in an apparently menacing gesture, it isn’t surprising that moray eels get a bad reputation. The fact that their sharp teeth face backward (causing severe damage to anyone trying to pull their hand out of a moray’s mouth) doesn’t help this reputation, and neither does the recent discovery that morays have a second set of “Alien”-like jaws that drags prey deep into their mouth and throat. The truth isn’t quite so simple. Most people know very little about these amazing animals.

The green moray (pictured above) is the most famous member of this group, but there are more than 200 species in the family Muraenidae. Green morays are not even really green (a yellow mucus deposited on a dark body creates the illusion of green skin). Snyder’s morays are less than a foot long when full grown, while giant slender morays can reach lengths of over 10 feet. Morays live in an impressive variety of habitats, including temperate and tropical seas, depths of several hundred meters, and even freshwater.

Does shark conservation result in more shark attacks?

October 6, 2011October 5, 2011 David Shiffman 5 Comments

Science

Meet Captain Bill Goldschmitt, an author, blogger, and commercial shark fisherman. Captain Bill is a passionate, opinionated, and influential man in the world of shark conservation and management. Unfortunately, the opinions that he chooses to passionately share are wildly incorrect. Captain Bill is a leading proponent of many ideas that have no basis in reality, including the notion that shark conservation efforts lead to an increased danger for humans from shark attacks.

He repeats this idea often on his blog. In recent months, he has written that the Florida Fish and Wildlife Commission has declared “open season” on Florida bathers by even considering new shark protection efforts, pleaded with Shark Week to focus more on how dangerous sharks are and less on their dwindling numbers and ecological importance, and compared shark conservationists to those who apologize for al-Qaeda terrorists.

Pseudoscience Redux: Shark Fin propaganda

October 5, 2011October 3, 2011 David Shiffman 20 Comments

Uncategorized

This post was originally published on September 9, 2010 as a part of our first Week of Ocean Pseudoscience. Enjoy!

Last weekend, longtime SFS reader Suzy sent me an interesting question. Suzy is Asian, and though she is a committed conservationist, several members of her family regularly eat shark fin soup. One relative just sent her a copy of a news article entitled “Shark Fin Soup: Eat it without guilt” (available here). Suzy asked me if the information in this article is correct, and how she should respond to her family members.

Though it is a few years old, I had never seen this article, and it’s a little shocking. I don’t know if I’ve ever seen a better example of distorting or ignoring science to promote a political agenda outside of Fox News. In short, Suzy, most of the information in here is either false or intentionally misleading.

Misunderstood Marine Life # 4 – The healing power of sharks

October 5, 2011October 5, 2011 David Shiffman 3 Comments

Science

Last year, we briefly discussed the myth that sharks don’t get cancer. This myth is easy to disprove, since sharks do, in fact, get cancer. The first cancerous tumor was discovered in a shark over 150 years ago and they have been discovered in more than twenty species. This year, I’m returning to the topic of shark medical myths.

Many parts of sharks have been utilized for their supposed medical benefits. Shark cartilage is sold as an over-the-counter alternative treatment for- you guessed it- cancer. One of the most ridiculous names it’s sold under as “BeneFin”. According to HowStuffWorks.com, the shark cartilage industry is worth over $25 million a year. The basic idea behind this is that since sharks don’t get cancer, if you eat ground up shark cartilage, your cancer will be treated.