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Showing 1 to 20 of 26 for “"brood parasitism"”.
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Host recognition and fitness costs of avian brood parasitism
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Avian brood parasitism as a model system for studying multispecies interactions
The relationships between avian brood parasites and their hosts are widely recognised as model systems for studying coevolution. Through the examination of tractable interactions between one species of brood parasite and one species of host, important insights have been gained on the processes that …
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Nesting aggregation as a Determinant of Brood Parasitism in Mason Bees (Osmia spp.)
… systems and are vulnerable to exploitation by brood parasites, such as kleptoparasitic wasps. High levels of nesting density have the potential to increase rates of brood parasitism by attracting larger numbers of parasites to areas with aggregations of nests. I conducted a field study in …
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An Experimental Study of Behavioral Responses to Nest Predation and Brood Parasitism in a Migratory Songbird
… breeding in highly fragmented landscapes where brood parasitism by Brown-headed Cowbirds (Molothrus ater) and nest predation can greatly reduce reproductive success. I studied populations of Prothonotary Warblers (Protonotaria citrea) in a fragmented bottomland forest during 1993--2000 and …
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Behavioral ecology of juvenile brown-headed cowbirds: implications for the evolution and maintenance of avian brood parasitism
Avian interspecific brood parasites are species that forego parental care and rely on heterospecifics to raise parasitic offspring. Host-parasite coevolutionary arms races and the constraints associated with a non-parasitic bird transitioning to a parasite likely contribute to the rarity of this …
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Urbanization affects environmental conditions for developing songbirds
… urban habitats also have far higher rates of brood parasitism, which can additionally restrict food intake for urban nestlings. However, this prior work has also found that urban song sparrow adults avoid consequences for living in urban habitats, so I wanted to see if nestlings were also able …
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Mechanisms underlying population dynamics of a migratory songbird in a fragmented forest
… edge effects (nest predation and cowbird brood parasitism), whereas others are attributed to fragment size and isolation (low pairing success, area sensitivity, unstable population sizes). I studied the impact of Brown-headed Cowbird (Molothrus ater) brood parasitism and of nest predation …
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Frontline interactions between avian interspecific brood parasites and their hosts
… and evolution of the interactions between avian brood parasites and their hosts. Evidence of coevolution, reciprocal evolution, between avian interspecific brood parasites and hosts is evident at all stages of the host nesting cycle. The first chapter of this thesis presents a broad literature …
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Frontline interactions between avian interspecific brood parasites and their hosts
… and evolution of the interactions between avian brood parasites and their hosts. Evidence of coevolution, reciprocal evolution, between avian interspecific brood parasites and hosts is evident at all stages of the host nesting cycle. The first chapter of this thesis presents a broad literature …
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Exploiters and exploited: antagonism, mutualism and mimicry in an ecological community
… shared ecological community. My focal system is brood parasitism, the exploitation of a host into raising a parasite’s offspring. I studied fork-tailed drongos Dicrurus adsimilis and their specialist parasite, the African cuckoo Cuculus gularis. The coevolutionary battle between these bird …
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Coevolution between brood-parasitic honeyguides and their hosts
Obligate brood parasites lay their eggs in the nests of other species, foisting the costs of parental care onto the host parents. The success of the parasite and host are then at odds, with both parties evolving defences and countermeasures in an evolutionary arms race. This reciprocal influence of …
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The function and evolution of egg colour in birds
… nests above the ground. In addition, the risk of brood parasitism is greatest in species with a high proportion of blue-green chroma, but nest attendance is higher for these nests, suggesting that parents may behaviourally mitigate the risks of parasitism. I also find greater variation between …
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Nesting Success of Dickcissel (Spiza americana) and Non-breeding Grassland Bird Use of Northwest Arkansas’ Remnant and Restored Tallgrass Prairies
… of nest success were site size size and brood parasitism. Prairie Kingsnake (Lampropeltis calligaster) was the primary nest predator. My second objective was to identify field site characteristics and vegetation use by non-breeding grassland-obligate birds in two remnant and three …
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Effects of urbanization on the physiology, behavior, and fitness of a wild songbird
… though they also had the added cost of increase brood parasitism by brown-headed cowbirds (Molothrus ater) compared to rural. Overall increased urban aggression was associated with higher reproductive success without any reduction in paternal care. Additionally, we found physiological differences …
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Natal dispersal and first-year survival in a neotropical migratory songbird
… of season, presence of a cowbird nestmate, brood size, and nestling body condition on the first-year survival probabilities. To date, this is the first study to document that both fledging date and the presence of a cowbird nestmate affect first-year survival in a migratory songbird.
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Signatures and forgeries: optimality in a coevolutionary arms race
… In the Choma District of southern Zambia, the brood-parasitic cuckoo finch *Anomalospiza imberbis* parasitises four species of cisticolid warbler. In response to parasitic egg mimicry, these four hosts have evolved inter-individual variation in egg colours and patterns: so-called egg …
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The effect of the landscape of fear on the parenting behaviour of the Eurasian reed warbler (Acrocephalus scirpaceus)
Pelolla on kauaskantoisia vaikutuksia eläinten fysiologiaan ja käyttäytymiseen, sillä se muuttaa niiden ravinnonhakutehokkuutta, jälkeläishoivaa ja lisääntymismenestystä. Lukuisat saalistukseen keskittyvät tutkimukset osoittavat, että esimerkiksi yksilöiden kokema saalistusriski voi vaikuttaa …
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Population Dynamics of Willow Flycatchers in the Sierra Nevada
… timing of the breeding season, predation and brood parasitism rates, and meadow and nest-scale characteristics and, in turn, how these affected reproductive investment, fecundity, site fidelity, and potential for population growth. Flycatchers breeding in the central regions initiated nesting …
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The role of preen oil and body odour in birds
… species or in species with intraspecific brood parasitism. The importance of odours in the ecology of birds has long been neglected, but the field of avian chemical ecology is now growing rapidly and promises important discoveries.
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