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Time running out for South Asian vultures, ecologists warn

Ecologists are calling on South Asian governments to ban veterinary use of the anti-inflammatory drug diclofenac. Without banning use of the drug in livestock species likely to be eaten by vultures - mainly cattle and buffalo - three species of vulture in the Indian subcontinent are likely to become extinct.

New research, published in the Journal of Applied Ecology, shows that exposure of vulture populations to a surprisingly small proportion of livestock carcasses contaminated with the drug - less than 1% - is sufficient to cause the rapid declines in vulture populations observed in India, Pakistan and Nepal over the past ten years. The study also found that the proportion of dead vultures with symptoms of diclofenac poisoning is close to that expected if this was the sole cause of the declines.

Dr Rhys Green of the Royal Society for the Protection of Birds and the University of Cambridge, the lead author of the new paper, said: "Our study indicates that diclofenac poisoning is the main cause - possibly the only cause - of these vulture declines, which are among the most rapid ever recorded for any wild bird. Time is running out if we are to save these species. Governments, drug companies, vets, livestock owners and conservationists should act together now to solve this problem."

The research builds upon a study by Lindsay Oaks and colleagues of The Peregrine Fund, published in Nature in January 2004, which showed that tissues of livestock treated with the standard veterinary dose of diclofenac shortly before death were lethal to captive vultures and that a high proportion of wild vultures found dead in Pakistan were contaminated with diclofenac and had the same symptoms as the poisoned birds in their experiments.

The most recent population surveys in India, carried out by the Bombay Natural History Society in 2003, show that the population of the oriental white-backed vulture (Gyps bengalensis) has fallen by more than 99% since the early 1990s,
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Contact: Stephan Traxl
bpl_je_temp4@oxon.blackwellpublishing.com
Blackwell Publishing Ltd.
1-Oct-2004


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