Study

Removal of feral cats Felis catus to reduce black-vented shearwater Puffinus opisthomelas mortality on Natividad Island, Baja California Sur, Mexico

  • Published source details Keitt B.S. & Tershy B.R. (2003) Cat eradication significantly decreases shearwater mortality. Animal Conservation, 6, 307-308

Actions

This study is summarised as evidence for the following.

Action Category

Control mammalian predators on islands for seabirds

Action Link
Bird Conservation
  1. Control mammalian predators on islands for seabirds

    A replicated before-and-after study on Natividad Island (7.4 ha), Baja California Sur, Mexico (Keitt & Tershy 2003), found that mortality rates of black-vented shearwaters Puffinus opisthomelas in four survey plots fell by 90%, from 7.4 carcasses/month (April-July 1997) to 0.7 carcasses/month (March-June 2002) following the eradication of feral cats Felis catus from the island. Extrapolated to the entire colony, this suggests a decrease in mortality from over 1,000 birds/month to fewer than 90 birds/month, with each of 25 cats killing approximately 37 birds/month.

     

Output references

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