Economically, live sharks > dead sharks

1 live reef shark in Palau = 179,000 USD in the ecotourism industry.  Or killed and sold once for 108 USD.  Just economically, not even considering the ecosystem services involved, sharks are worth much more alive.  This has been in the news for a bit but worth pointing out especially in the wake of Shark Week.

Video: Pew Environment Group. Press release here.


Shark week and some numbers

The Discovery Channel’s annual Shark Week, a week of television programs devoted to these toothy ocean residents, began yesterday.  Shark Week has introduced many people to the wonder of these unique predators, the likes of which help to keep ocean ecosystems balanced, and usually includes bits on shark conservation and other scientific content.  If you head over to their website there’s a nifty interactive map where you can click on different regions and learn about what species of sharks frequent those areas and even what their conservation statuses are.  There’s also a shark facts page with shark conservation information and states that you are more likely to get bitten by another person than a shark.

However, in regards to the high-profile television programs themselves, many of the titles  evoke images of attacks, such as ‘Rogue Sharks’ and ‘Killer Sharks.’

Over the years, the media in general has not been kind to these animals, giving disproportionate attention to, as John Bruno over at SeaMonster puts it, “sharks behaving badly, i.e. eating stuff.”  However, the reality is that tens of millions of sharks are being killed every year, and the populations of these ecologically important creatures are declining globally.

Six fatal shark attacks were reported last year globally, according to the International Shark Attack File.  73 non-fatal attacks were also recorded.  Loss of life is tragic, and I am certainly not attempting to play down any individuals’ experiences who were harmed by sharks, but these sorts of numbers do not justify an all-out fear of these animals.  For example, in 2008 (the latest year data seems to be available), 39,000 people in the United States were killed in car accidents, and most of us view traveling by car as a reasonable risk.  For some other comparisons, you can see the Florida Museum of Natural History’s ‘Relative Risk’ page.

I’m not trying to pick on Discovery, which over the years, has gotten many people more interested in science.  Nor am I implying that you should rub seal innards on yourself and try to give one of these big fish a peck on the cheek.  But sharks need our help—that is, we need to stop decimating them.  And that does include considering the economics and motivations of the fin trade and presenting people with an alternative.

Be sure to check out SeaMonster, Deep Sea News, and Southern Fried Science for more on Sharks and Shark Week.

Image 1:  Caribean reef shark, Alfonso Gonzàlez on Flickr (CC). Image 2: Windell Oskay on Flickr (CC).  

Teaching sharks that lionfish are tasty?

Some gutsy local divers have been teaching sharks just how good lionfish are to eat in Roatan Marine Park off the coast of Honduras [The Seamonster].

Dr John Bruno, over at the excellent new ocean-science blog, Seamonster, points out some new efforts in the fight against a particularly troubling invasive species, the lionfish.  Lionfish are native to the Indo-Pacific but have invaded waters along the US eastern seaboard, all the way down to South America, and represent an enormous ecological change, as pretty much nothing is left to eat them.  But apparently there are efforts afoot to change that, by working with sharks, and by attempting to convince a largely land-based bunch of bipeds that they’re yummy as well.