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Habitat selection rules in breeding mallards (Anas platyrhynchos): a test of two competing hypotheses
Finnish Game and Fisheries Research Institute, Evo Game Research Station.
Department of Animal Ecology, Swedish University of Agricultural Sciences, Umeå. (Akvatisk biologi och kemi)
Department of Animal Ecology, Swedish University of Agricultural Sciences, Umeå.
Department of Applied Zoology, University of Helsinki.
1998 (engelsk)Inngår i: Oecologia, ISSN 0029-8549, E-ISSN 1432-1939, Vol. 114, nr 2, s. 283-287Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Ideal preemption and conspecific attraction are alternative hypotheses of the habitat selection rules used by individuals. According to the former an occupied site is assumed to be preempted and therefore not available for later arriving individuals, whereas according to the latter individuals are assumed to be attracted by conspecifics to occupied sites, rather than avoiding them. We studied these competing hypotheses in breeding mallards (Anas platyrhynchos) by a cross-over experiment in 2 years, introducing birds onto lakes before migratory wild mallards arrived. If mallards use the ideal preemptive rule, breeding density of wild mallards in experimental lakes should be lower and they should be occupied less frequently than control lakes, but if mallards use the conspecific attraction rule the reverse should be true. Our results allowed us to reject the ideal preemptive rule whereas the conspecific attraction rule was to some extent supported. We discuss these findings in relation to population limitation. The results suggest that the local breeding population studied is not limited by spacing behaviour related to habitat selection.

sted, utgiver, år, opplag, sider
1998. Vol. 114, nr 2, s. 283-287
Emneord [en]
Anas platyrhynchos, conspecific attraction, habitat selection, ideal, preemptive distribution, population limitation, CONSPECIFIC ATTRACTION, TEAL, WATERFOWL, DENSITY, CRECCA, DUCKS
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URN: urn:nbn:se:hkr:diva-5393DOI: 10.1007/s004420050447ISI: 000073019100018ISBN: 0029-8549 (tryckt)OAI: oai:DiVA.org:hkr-5393DiVA, id: diva2:317797
Tilgjengelig fra: 2010-05-05 Laget: 2009-12-07 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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