Brood size and begging intensity in nestling birds
نویسندگان
چکیده
منابع مشابه
Brood size, sibling competition, and the cost of begging in great tits (Parus major)
Evolutionary theory of parent-offspring conflict explains begging displays of nestling birds as selfish attempts to influence parental food allocation. Models predict that this conflict may be resolved by honest signaling of offspring need to parents, or by competition among nestmates, leading to escalated begging scrambles. Although the former type of models has been qualitatively supported by...
متن کاملHeritability of nestling begging intensity in the house sparrow (Passer domesticus).
Evolutionary theory of parent-offspring conflict assumes that offspring food solicitation behavior, known as begging, and parental response to begging are subjected to selection and coevolution. This assumption implies that begging intensity should be heritable, at least to some degree. Although some studies have suggested that begging is heritable, the evidence for this is rare and mostly indi...
متن کاملBrood size and its importance for nestling growth in the Biscutate Swift (Streptoprocne biscutata, Aves: Apodidae).
Many Apodidae, including Streptoprocne biscutata (Sclater, 1866), drop eggs from their nests during incubation. This is interpreted as nest site competition or accident. We provide evidence that egg ejection is deliberate and that this behaviour controls the brood size. Brood sizes were manipulated and nestling growth was measured to test the hypothesis that pairs can regulate brood size during...
متن کاملThe energetic cost of begging behaviour in nestling house wrens.
This study presents data relevant to the hypothesis that the energy expenditure associated with begging influences the signalling of need by nestling birds. We used open-circuit respirometry to measure the energy costs of resting, begging and non-begging activities in nestling house wrens, Troglodytes aedon, ranging in age from 1 to 11 days post-hatching. Across all ages, begging caused a 27% i...
متن کاملBegging and cowbirds: brood parasites make hosts scream louder
Avian brood parasites have evolved striking begging ability that often allows them to prevail over the host progeny in competition for parental resources. Host young are therefore selected by brood parasites to evolve behavioral strategies that reduce the cost of parasitism. We tested the prediction that the intensity of nestling begging displays functioning to attract parental care increases a...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2000
ISSN: 1465-7279
DOI: 10.1093/beheco/11.2.196