David Shiffman

State of the Field: Shark Conservation Policies

March 1, 2011March 1, 2011 David Shiffman 6 Comments

Shark populations around the world are crashing. Researchers have reported that many populations have decreased by 90% or more since the 1970’s. The leading causes for these precipitous declines are bycatch, which kills tens of millions of sharks each year, and the shark fin fishery, which kills as many as 73 million sharks each year. In this edition of State of the Field, I will explain what different countries are doing about this problem.

In many parts of the world, it is still legal to cut the fins off of a still-living shark and dump the rest of the animal overboard where it will bleed to death or drown. Other nations have a variety of management policies.

Dead Zambezi Shark tangled in shark nets — Credit: Fiona Ayerst, Marine Photobank

Stem cell research, science policy, and President Bush’s book

February 24, 2011February 21, 2011 David Shiffman

Science

At the recommendation of my parents, I’ve started reading “Decision Points”, President Bush’s autobiography. I’ve enjoyed it more than I expected to. It paints a picture of a well-intentioned guy doing what he thought was right in tough circumstances and occasionally getting it wrong. I find this view of President Bush more appealing than either of the common liberal caricatures of him (those being either an evil genius trying to destroy the world or a bumbling idiot completely out of his depth).

Each chapter focuses on an important decision he made during his two-term Presidency. One of these concerned his stem cell research policy and made a few references to his policy towards science as a whole. Since liberals considered his science policies so bad that incoming-President Obama references “restoring science to it’s rightful place” in his inauguration speech, I was curious to hear President Bush’s side of the story.

Turtle science at the Archie Carr National Wildlife refuge

February 23, 2011February 23, 2011 David Shiffman

Conservation, Science

The high density of sea turtles at the Archie Carr National Wildlife Refuge provides a wonderful opportunity for research, and a team from the University of Central Florida takes full advantage of it. They were kind enough to allow me to tag along.

Shark Science Monday: Nick Dulvy talks about determining shark’s conservation status

February 21, 2011 David Shiffman 2 Comments

Conservation, Science

In this week’s edition of Shark Science Monday, Nick Dulvy, co-chair of the IUCN Shark Specialist Group, discusses how researchers determine the conservation status of shark species. If you have a question for Nick, leave it below and I’ll make sure he sees it.

Science Fails in Pop Music Songs

February 17, 2011February 17, 2011 David Shiffman 17 Comments

Popular Culture, Science

I’ve found that I enjoy certain types of music more when I don’t listen to the words too closely. However, a mild addiction to karaoke and a lifelong inability to “just let it go” has made it impossible for me to avoid knowing the lyrics.

We’ve been known to criticize how science is portrayed in movies and television shows here on Southern Fried Science. Pop music is far from innocent when it comes to scientific misunderstandings, and it seems only fair that I criticize that genre as well. Here are some recent examples that have been driving me crazy.

State of the Field: Satellite tagging sharks

February 15, 2011 David Shiffman 2 Comments

Science

Modern shark researchers have access to a variety of high-tech tools. Acoustic tags with noises specific to each individual shark signal a receiver (or network of receivers) every time the shark passes nearby. Some tags have three-dimensional accelerometers, allowing researchers to study the small scale movement patterns and behaviors of sharks. Others, which are placed in the stomach, measure pH before, during, and after digestion. The most advanced technology on the market, however, is undoubtedly the satellite tag.

Shark Science Monday: Sonja Fordham explains international shark conservation and management policies

February 14, 2011February 14, 2011 David Shiffman

Conservation

In this week’s edition of Shark Science Monday, Shark Advocates International President Sonja Fordham explains international conservation and management policies. If you have a question for Sonja, please leave it as a comment and I’ll make sure it gets to her.

Biodiversity Wednesday: Ngorongoro Crater

February 9, 2011February 9, 2011 David Shiffman

Uncategorized

Located in the East African nation of Tanzania, Ngorongoro Crater (pronounced just like it’s spelled, 😉 ) is one of the coolest places I’ve ever had the privilege to visit. Technically a caldera, the remnants of a collapsed volcano, the floor of Ngorongoro provides over 100 square miles of habitat surrounded by steep walls to more than 25,000 animals.

ngorscenery — Ngorongoro Crater- what looks like mountains in the distance actually surrounds the habitat. Photo credit: David Shiffman, 2001

State of the Field: Is catch-and-release fishing harmful to sharks?

February 8, 2011February 2, 2011 David Shiffman 10 Comments

Conservation, Science

In the wake of the new Marianas Islands shark conservation law, a debate has been raging on the shark listservs. The law wouldn’t have been possible without support from several local recreational fishermen- people who often take tourists catch-and-release fishing for sharks.

“When I heard of your effort in Hawaii to ban the sale,trade and possession of shark fins I knew if the CNMI was to follow someone with inside connections to the fishing world there had to espouse it and grow it. They do not like being told what to do from outsiders. I was not an outsider, and I fished alongside two of the very top level fishermen who happened to be upper level politicians whom I respected. Rep. Diego Benevente was one of them. I spoke with him and asked him to introduce a bill which replicated Hawaii’s law, and he did so. I kept constant contact with him and his staff in the effort to see this bill become law.”- Captain William McCue

shark_fishing_web_copy — Image from FishingDestin.info

Many shark conservationists support catch-and-release fishing, claiming that it allows fishermen the thrill of catching a large animal without killing it. Captain McCue reports that in the last 20 years:

“I’ve caught over 300 sharks in the that time a killed four- and if you include spiny dogfish it’s caught well over 2000 sharks and still killed only four- two of which were promptly eaten.”

However, some (such as “My Sunset Rendezvous” author Ila France Porcher) claim that even when a shark is released, the stress from being caught often still causes long-term damage or even death.

“As a shark ethologist, I have personally witnessed sharks who were hooked and fought, and who broke the line, emerge from the ordeal with a jaw so damaged that they lost weight and died over the following weeks or months. A high fraction of sharks caught suffered this fate, and they suffered greatly as a result of this enjoyable passtime pursued by sports fishermen. It would be great news to hear that you switched from a blood sport to a sport that celebrates the life that still remains in our seas, such as diving and photography.” – Ila France Porcher

Ethical Debate: Clean Energy and the State of the Union

February 1, 2011January 30, 2011 David Shiffman 7 Comments

Uncategorized

I’ve been critical of President Obama’s policies concerning science, technology and education in the past. I think he uses a lot of great-sounding rhetoric, but I have yet to see very much in the way of actual results. Despite lofty promises about climate change, we remain without a cap-and-trade system or any sort of meaningful response plan. To make things worse, the administration recently fired their primary adviser for climate change policy. Is all hope lost? Perhaps not.