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Jun

12

2008
 
 

Jets and sharks



Large predatory sharks are about to leave the Mediterranean Do we still need a bigger boat?The Mediterranean sea is pretty much a big pond, so many European holiday makers would probably breathe a quiet sigh of relief to read in Conservation Biology that the number of big, fierce sharks swimming among them has plummeted in recent years. An international team, led by Dalhousie University's Francesco Ferretti, fearlessly waded through public and private archives, searching for evidence of population trends among the twenty largest species known to prowl the Med. In the five species for which there were sufficient data – a paucity all too telling of our scientific neglect of these top oceanic predators – precipitous declines were clear. Hammerhead sharks Sphyrna spp. were worst hit: none have been seen in coastal waters since 1963, and no records of the sharks anywhere in the Mediterranean exist after 1995. Nervous bathers should note that only the thresher shark Alopias vulpinus has been recorded in coastal waters in recent years. If looks like it is safe to be in the water after all. Just as long as you're not a shark. Source: Ferretti F, Myers RA, Serena F & Lotze HK (2008) Loss of large predatory sharks from the Mediterranean Sea. Cons. Biol. DOI: 10.1111/j.1523-1739.2008.00938.x Image: © Bart Coenders

Filed Under Community-based conservation, Economics and conservation, Endangered species, Habitat, Marine, Restoration, Socio-political issues | 

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