David Shiffman

Ethical Debate: Bycatch and the Great Skua

April 16, 2010May 16, 2010 David Shiffman 14 Comments

Uncategorized

Most marine conservationists and environmentally conscious citizens believe that fisheries bycatch is a major problem that needs to be solved soon. In most cases, they are correct, but an interesting paper from Nature shows that bycatch can sometimes be good for certain species. Consider the case of the Great Skua. The Great Skua is a … Read More “Ethical Debate: Bycatch and the Great Skua” »

10 reasons why marine mammals aren’t as cute as you think they are

April 8, 2010October 31, 2013 David Shiffman 44 Comments

Science

When people learn that I’m a marine biologist, they often assume I got into this career because I want to be a dolphin trainer. The general public seems to believe that marine mammals are cute and cuddly and innocent, but sharks are cruel and evil and bad. In reality, nature is an amoral place- our morality is, by necessity, anthropocentric and doesn’t really relate to the wild behavior of animals. If this wasn’t the case, though, here are ten reasons why marine mammals aren’t as cute and cuddly and innocent as people sometimes think they are.

A different perspective on the CITES disaster

April 7, 2010 David Shiffman 2 Comments

Conservation

Lots has been written about the recent failure of CITES to protect marine species. Most of it focuses on blaming countries like Japan and China for putting commerce ahead of science and conservation. However, SCUBA operator and blogger Mike Da Shark has a different perspective- he criticizes the NGOs who advocated for conservation.

Reader mail: Sustainable shark finning?

April 5, 2010April 5, 2010 David Shiffman 5 Comments

Conservation, Science

Our latest reader mail comes from my friend Mike, who writes for the conservative political blog SaveTheGop. Though we don’t agree on much, he’s usually a reasonable guy. His question concerns a post I recently wrote about Hawaii’s proposed bill to ban the sale of shark fins within their state.

WhySharksMatter’s 2nd PCR

April 5, 2010April 5, 2010 David Shiffman 1 Comment

Science

After the failure of my first PCR, we tried again. This one is more successful. Of my 7 samples, 5 amplified. We aren’t sure why the other two didn’t, so I’m going to try to re-extract DNA from them and try a few different primers with them this week.

Read More “WhySharksMatter’s 2nd PCR” »

Might as well eat ’em: A semi-serious April Fool’s Day ethical debate

April 1, 2010April 4, 2010 David Shiffman 38 Comments

Conservation

Bluefin tuna are some of the most endangered fish in the sea. Prized by the sushi industry for their delicious flavor, populations of bluefin have declined precipitously in recent decades.

They also may be the first species of fish to be driven to extinction by commercial fishing. Normally, when populations of fish get low, it isn’t profitable to fish for them anymore- thus they are not driven to extinction. However, a single bluefin tuna can sell for hundreds of thousands of dollars, so it is still profitable to fish for the last one.

Has President Obama broken a promise on offshore drilling?

March 31, 2010 David Shiffman 15 Comments

Conservation

I received an e-mail from Oceana today encouraging me to “tell President Obama to keep his promise”. The e-mail claims that while running for President, he campaigned against offshore oil drilling, which would make his recent announcement about allowing offshore drilling a broken promise indeed. However, I seem to remember that Obama as a candidate was for offshore drilling. I went to my favorite non-partisan fact check website, Politifact, to sort this out.

An update on WhySharksMatter’s first PCR

March 31, 2010April 4, 2010 David Shiffman 1 Comment

Science

I know that many of you have been losing sleep over the questionable quality of my first PCR and gel. Well, the mystery has been solved! My lab partner made the gel with DI water instead of with TAE/agarose solution. Not only is that an easily fixable problem for the future… it’s something that, for … Read More “An update on WhySharksMatter’s first PCR” »

WhySharksMatter in College of Charleston magazine

March 30, 2010April 4, 2010 David Shiffman

Conservation, Science

The most recent issue of the College of Charleston magazine came out this week, and it features an article about sharks by yours truly! Check it out below. Suggestions and critiques are appreciated. I know it’s hard to read- here is a link to the online article.

WhySharksMatter’s first PCR!

March 25, 2010April 21, 2010 David Shiffman 10 Comments

Science

As promised, here are the results of my first ever PCR. Here is some background:

I am going to be running some population genetics on sandbar shark DNA with the intention of comparing subpopulations from South Carolina with those from Virginia.

I am in the very early stages- seeing which primers work for PCR. Four primers each were tested- called A, B, C and D- on three shark DNA samples and a negative control. Ignore the samples on the bottom, they are from another student’s project. The four samples in the upper right are my negative controls.

The PCR was run yesterday (my first PCR), and I ran the gel today (my first gel).

It seems to me that Primer A is successfully copying my DNA during PCR, while B, C, and D are not.