Nest desertion by a cowbird host: an antiparasite behavior or a response to egg loss?
نویسندگان
چکیده
منابع مشابه
Parental care of a cowbird host: caught between the costs of egg-removal and nest predation.
Avian brood parasites reduce host fitness through the addition of parasitic eggs and the removal of host eggs. Both parasitic egg-addition and host egg-removal may be important sources of selection on host behaviour, creating fitness trade-offs with selection imposed by nest predation. However, the relative costs hosts suffer from egg-addition and host egg-removal and the responses to these cos...
متن کاملNest desertion by blue-gray gnatcatchers in association with brown-headed cowbird parasitism
The blue-gray gnatcatcher, Polioptila caerulea, is one of the smallest regular hosts of the brown-headed cowbird, Molothrus ater. Gnatcatchers typically raise none of their own young when parasitized, yet anti-parasite behaviours have not been reported. A blue-gray gnatcatcher population in which pairs often desert nests when parasitized by cowbirds was studied to examine the success of a deser...
متن کاملAntiparasite behavior
What do you think are the biggest challenges to the scientific community in the short/medium/ long term? I think we need to get out more. Science has become ghettoised. The pressures of the grant-publication-grant cycle are keeping people in their labs, talking to a very narrow range of people. Science is increasingly a disconnected and segregated activity. This situation has a lot of very nega...
متن کاملCowbird removals unexpectedly increase productivity of a brood parasite and the songbird host.
Generalist brood parasites reduce productivity and population growth of avian hosts and have been implicated in population declines of several songbirds of conservation concern. To estimate the demographic effects of brood parasitism on Bell's Vireos (Vireo bellii), we removed Brown-headed Cowbirds (Molothrus ater) in a replicated switchback experimental design. Cowbird removals decreased paras...
متن کاملRetaliatory mafia behavior by a parasitic cowbird favors host acceptance of parasitic eggs.
Why do many hosts accept costly avian brood parasitism even when parasitic eggs and nestlings differ dramatically in appearance from their own? Scientists argue that evolutionary lag or equilibrium can explain this evolutionary enigma. Few, however, consider the potential of parasitic birds to enforce acceptance by destroying eggs or nestlings of hosts that eject parasitic eggs and thereby reje...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2006
ISSN: 1465-7279,1045-2249
DOI: 10.1093/beheco/arl025