Nest environment modulates begging behavior of a generalist brood parasite
نویسندگان
چکیده
منابع مشابه
Vocal matching and intensity of begging calls are associated with a forebrain song circuit in a generalist brood parasite.
Vocalizations produced by developing young early in life have simple acoustic features and are thought to be innate. Complex forms of early vocal learning are less likely to evolve in young altricial songbirds because the forebrain vocal-learning circuit is underdeveloped during the period when early vocalizations are produced. However, selective pressure experienced in early postnatal life may...
متن کاملPartial host fidelity in nest selection by the shiny cowbird (Molothrus bonariensis), a highly generalist avian brood parasite.
Obligate avian brood parasites can be host specialists or host generalists. In turn, individual females within generalist brood parasites may themselves be host specialists or generalists. The shiny cowbird Molothrus bonariensis is an extreme generalist, but little is known about individual female host fidelity. We examined variation in mitochondrial control region sequences from cowbird chicks...
متن کاملA generalist brood parasite modifies use of a host in response to reproductive success.
Avian obligate brood parasites, which rely solely on hosts to raise their young, should choose the highest quality hosts to maximize reproductive output. Brown-headed cowbirds (Molothrus ater) are extreme host generalists, yet female cowbirds could use information based on past reproductive outcomes to make egg-laying decisions thus minimizing fitness costs associated with parasitizing low-qual...
متن کاملEcological Correlates and Sex Differences in Early Development of a Generalist Brood Parasite
A.—Parents influence the phenotype of their offspring by determining the environment in which early development occurs. The many factors that affect growth in avian brood parasites provide an excellent context in which to examine how ecological variables and sex differences influence plasticity of early development. We used a model-selection approach to determine the most important varia...
متن کاملMolecular tracking of individual host use in the Shiny Cowbird – a generalist brood parasite
Generalist parasites exploit multiple host species at the population level, but the individual parasite's strategy may be either itself a generalist or a specialist pattern of host species use. Here, we studied the relationship between host availability and host use in the individual parasitism patterns of the Shiny Cowbird Molothrus bonariensis, a generalist avian obligate brood parasite that ...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2015
ISSN: 1045-2249,1465-7279
DOI: 10.1093/beheco/arv140