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Period lenght in cyclic animal populations

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dc.contributor.author Högstedt, Göran
dc.contributor.author Seldal, Tarald
dc.contributor.author Breistøl, Arild
dc.date.accessioned 2008-02-11T07:23:37Z
dc.date.available 2008-02-11T07:23:37Z
dc.date.issued 2005
dc.identifier.citation Ecology 2005 69 (2): 373-378. Copyright by the Ecological Society of America en
dc.identifier.issn 0012-9615
dc.identifier.uri http://hdl.handle.net/1956/2580
dc.description.abstract Although cyclic animal dynamics have long been a focus of scientific interest, the variable cycle lengths are poorly understood. Based on a review of the literature, we suggest that period length in animals showing multiannual cycles is related to the life span of their food plant rather than to any trait of the animal, such as mass or fecundity. We envisage that this pattern is brought about by a prolonged mobilization of induced defenses in longer lived plants, which can better afford periods of low reproductive output than can short-lived plants. On the basis of this hypothesis we expect animals with similar diets to show similar cycle lengths, irrespective of taxonomy and size. A path analysis, on the vertebrate herbivores, shows that 92% of the variation in cycle length is explained by foodplant longevity and that body mass adds little to this. en
dc.language.iso eng en
dc.publisher Ecological Society of America en
dc.subject Bird en
dc.subject Cyclic herbivore populations en
dc.subject Food-plant longevity en
dc.subject Herbivory en
dc.subject Insect en
dc.subject Mammals en
dc.subject Multiannual cycles en
dc.subject Plant life span en
dc.title Period lenght in cyclic animal populations en
dc.type Peer reviewed en
dc.type Journal article en
dc.subject.nsi VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 no


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