Rapid population declines of Egyptian vulture (Neophron percnopterus) and red-headed vulture (Sarcogyps calvus) in India. Cuthbert, R., Green, R. E., Ranade, S., Saravanan, S., Pain, D. J., Prakash, V., & Cunningham, A. A. Animal Conservation, 9(3):349--354, 2006. 00049
Rapid population declines of Egyptian vulture (Neophron percnopterus) and red-headed vulture (Sarcogyps calvus) in India [link]Paper  doi  abstract   bibtex   
Since the early 1990s, large and rapid population declines of three species of vulture (Gyps spp.) endemic to south Asia have occurred on the Indian subcontinent and have led to these species being listed by IUCN as critically endangered. Evidence of rates of population decline, cause of death and toxicity is consistent with these declines being caused by poisoning of vultures through the ingestion of tissues from livestock treated with the anti-inflammatory drug diclofenac. In this paper, analysis of repeated surveys in and near protected areas widely spread across India shows that populations of two other vulture species, Egyptian vulture Neophron percnopterus and red-headed vulture Sarcogyps calvus, have also declined markedly and rapidly, but probably with a later onset than Gyps vultures in the same region. The declines continued at least up to 2003. It is recommended that these two species are considered for inclusion in the IUCN Red List and for urgent remedial conservation measures. Research is needed to determine whether or not the principal cause of these declines is diclofenac poisoning and to establish population trends in other scavenging birds in the Indian subcontinent.
@article{ cuthbert_rapid_2006,
  title = {Rapid population declines of Egyptian vulture (Neophron percnopterus) and red-headed vulture (Sarcogyps calvus) in India},
  volume = {9},
  issn = {1469-1795},
  url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1469-1795.2006.00041.x/abstract},
  doi = {10.1111/j.1469-1795.2006.00041.x},
  abstract = {Since the early 1990s, large and rapid population declines of three species of vulture (Gyps spp.) endemic to south Asia have occurred on the Indian subcontinent and have led to these species being listed by {IUCN} as critically endangered. Evidence of rates of population decline, cause of death and toxicity is consistent with these declines being caused by poisoning of vultures through the ingestion of tissues from livestock treated with the anti-inflammatory drug diclofenac. In this paper, analysis of repeated surveys in and near protected areas widely spread across India shows that populations of two other vulture species, Egyptian vulture Neophron percnopterus and red-headed vulture Sarcogyps calvus, have also declined markedly and rapidly, but probably with a later onset than Gyps vultures in the same region. The declines continued at least up to 2003. It is recommended that these two species are considered for inclusion in the {IUCN} Red List and for urgent remedial conservation measures. Research is needed to determine whether or not the principal cause of these declines is diclofenac poisoning and to establish population trends in other scavenging birds in the Indian subcontinent.},
  language = {en},
  number = {3},
  urldate = {2014-07-27TZ},
  journal = {Animal Conservation},
  author = {Cuthbert, R. and Green, R. E. and Ranade, S. and Saravanan, S. and Pain, D. J. and Prakash, V. and Cunningham, A. A.},
  year = {2006},
  note = {00049},
  keywords = {Egyptian Vulture, India, Neophron percnopterus, Sarcogyps calvus, conservation, population declines, red-headed vulture, vultures},
  pages = {349--354}
}
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