Nest predation risk explains variation in avian clutch size
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چکیده
منابع مشابه
Can selection on nest size from nest predation explain the latitudinal gradient in clutch size?
1. Latitudinal variation in clutch sizes of birds is a well described, but poorly understood pattern. Many hypotheses have been proposed, but few have been experimentally tested, and none have been universally accepted by researchers. 2. The nest size hypothesis posits that higher nest predation in the tropics favours selection for smaller nests and thereby constrains clutch size by shrinking a...
متن کاملIndirect cues of nest predation risk and avian reproductive decisions.
Current life-history theory predicts that increased mortality at early stages of life leads to reduced initial investment (e.g. clutch size) but increased subsequent investment during the reproduction attempt. In a field experiment, migratory pied flycatchers Ficedula hypoleuca perceived differences in mammalian nest predation risk and altered their reproductive strategies in two respects. Firs...
متن کاملVariation in clutch size in relation to nest size in birds
Nests are structures built to support and protect eggs and/or offspring from predators, parasites, and adverse weather conditions. Nests are mainly constructed prior to egg laying, meaning that parent birds must make decisions about nest site choice and nest building behavior before the start of egg-laying. Parent birds should be selected to choose nest sites and to build optimally sized nests,...
متن کاملFluctuating survival selection explains variation in avian group size.
Most animal groups vary extensively in size. Because individuals in certain sizes of groups often have higher apparent fitness than those in other groups, why wide group size variation persists in most populations remains unexplained. We used a 30-y mark-recapture study of colonially breeding cliff swallows (Petrochelidon pyrrhonota) to show that the survival advantages of different colony size...
متن کاملBreeding Phenology of Birds: Mechanisms Underlying Seasonal Declines in the Risk of Nest Predation
Seasonal declines in avian clutch size are well documented, but seasonal variation in other reproductive parameters has received less attention. For example, the probability of complete brood mortality typically explains much of the variation in reproductive success and often varies seasonally, but we know little about the underlying cause of that variation. This oversight is surprising given t...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2017
ISSN: 1045-2249,1465-7279
DOI: 10.1093/beheco/arx130