Predation of bird nests by introduced Japanese Weasel Mustela itatsi on an island

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  • Predation of Bird Nests by Introduced Japanese Weasel<i>Mustela itatsi</i>on an Island

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We investigated bird nest predation on Miyake Island where the Japanese Weasel Mustela itatsi has been introduced. From observations of Japanese Bush Warbler nests, we estimated survival rates of 0.498 and 0.848 in incubation and nestling stages, respectively. Artificial nests coupled to an automatic image recording system showed that weasels were bird nest predators on three occasions. No other potential predators visited the nests; before the weasel introduction, nest predation was rarely reported on the island. The incidence of predation on artificial nests increased as a function of the density of predated artificial nests in the neighborhood. Other nest-site characteristics were not related to nest predation, except for height above the ground. Lower nests had slightly higher risks of predation. Hence, the fate of a nest appears to depend on whether it is located within home ranges of the Japanese Weasel. Weasels may easily find nests located within their activity ranges irrespective of their site characteristics. Japanese Weasels must be regarded as a major threat to breeding birds on Miyake Island.

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Details 詳細情報について

  • CRID
    1390001205189902464
  • NII Article ID
    130004725562
  • DOI
    10.2326/osj.8.139
  • ISSN
    27595897
    13470558
  • Text Lang
    en
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
    • OpenAIRE
  • Abstract License Flag
    Disallowed

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