About: Double Allee effects and extinction in the island fox     Goto   Sponge   NotDistinct   Permalink

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Description
  • The island fox (Urocyon littoralis) is endemic to six of the eight California Channel Islands. Population crashes have coincided with an increase in predation by Golden Eagles (Aquila chrysaetos). Allee effects could be an explanation for their sharp decline. We analyzed fox demographic data collected between 1988 and 2000 and showed that a double Allee effect simultaneously influenced survival (of adults and pups) and proportion of breeding adult females, that the Allee effect in adult survival was driven by predation by eagles, and that these component Allee effects led to a demographic Allee effect. As a result, Allee effects may have contributed to the dramatic declines in three fox populations. Conservationists should be aware of these results in the island fox management.
  • The island fox (Urocyon littoralis) is endemic to six of the eight California Channel Islands. Population crashes have coincided with an increase in predation by Golden Eagles (Aquila chrysaetos). Allee effects could be an explanation for their sharp decline. We analyzed fox demographic data collected between 1988 and 2000 and showed that a double Allee effect simultaneously influenced survival (of adults and pups) and proportion of breeding adult females, that the Allee effect in adult survival was driven by predation by eagles, and that these component Allee effects led to a demographic Allee effect. As a result, Allee effects may have contributed to the dramatic declines in three fox populations. Conservationists should be aware of these results in the island fox management. (en)
  • Liška ostrovní (Urocyon littoralis) je endemickým druhem na šesti z osmi ostrovů ze souostroví California Channel Islands. Pokles početnosti jejich populací se časově shoduje se vzrůstem jejich predace orlem skalním (Aquila chrysaetos). Případná přítomnost Allee efektů by mohla být vysvětlením tohoto poklesu. Analýzou demografických dat lišky ostrovní z let 1988 až 2000 jsme zjistili, že dvojitý Allee efekt ovlivnil současně přežívání lišky (dospělců i mláďat) a procento množících se samic, že Allee efekt v přežívání dospělců byl způsoben predací orlem skalním, a že tyto komponentní Allee efekty vedly k demografickému Allee efektu. Allee efekty tedy pravděpodobně přispěly k dramatickému poklesu tří populací lišky ostrovní. Konzervační biologové by měli tyto výsledky brát v úvahu při managementu populací lišky ostrovní. (cs)
Title
  • Double Allee effects and extinction in the island fox
  • Dvojité Allee efekty a extinkce lišky ostrovní (cs)
  • Double Allee effects and extinction in the island fox (en)
skos:prefLabel
  • Double Allee effects and extinction in the island fox
  • Dvojité Allee efekty a extinkce lišky ostrovní (cs)
  • Double Allee effects and extinction in the island fox (en)
skos:notation
  • RIV/60077344:_____/07:00084947!RIV08-AV0-60077344
http://linked.open.../vavai/riv/strany
  • 1082;1091
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(KJB600070602), Z(AV0Z50070508)
http://linked.open...iv/cisloPeriodika
  • 4
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 418076
http://linked.open...ai/riv/idVysledku
  • RIV/60077344:_____/07:00084947
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Allee efect; Aquila chrysaetos; golden Eagle (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [A5D286C5848B]
http://linked.open...i/riv/nazevZdroje
  • Conservation Biology
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 21
http://linked.open...iv/tvurceVysledku
  • Berec, Luděk
  • Courchamp, F.
  • Gascoigne, J.
  • Angulo, E.
  • Roemer, G. W.
http://linked.open...n/vavai/riv/zamer
issn
  • 0888-8892
number of pages
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