The threat to ocean-going sharks is more severe than previously thought, according to conservation experts. Scientists with the World Conservation Union, which publishes the Red Lists of Threatened Species, have upgraded the "threat" category of several sharks.
Those now considered "vulnerable to extinction" include the shortfin mako, a favourite of recreational fishermen, and the long-tailed thresher shark.
Scientists say over-fishing is a principal reason for the decline. The World Conservation Union's (IUCN) shark specialist group announced its re-assessments at a workshop in Oxford, UK.
"Despite mounting threats and evidence of decline, there are no international catch limits for pelagic (ocean-going) sharks," said Sonja Fordham, deputy chair of the shark specialist group and policy director for the Shark Alliance. "The workshop results underscore the urgent need for international fishery commissions to limit fishing for these vulnerable species and strengthen regulations on the wasteful practice of finning."
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http://news.bbc.co.uk/2/hi/science/nature/6385995.stm