Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"nestling period"”.
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PATERNAL ATTRACTIVENESS AND PARENTAL INVESTMENT STRATEGIES IN SONG SPARROWS MELOSPIZA MELODIA
… offspring sex ratios near the end of the nestling period, although not earlier in the nestling period. Males with complex songs also provisioned offspring at higher rates, and consequently their nestlings grew at faster rates than offspring in nests of less complex singers. The degree to …
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Facultative adjustment of pre-fledging mass recession by nestling Chimney Swifts (Chaetura pelagica)
… mass recession is a crucial aspect of the nestling period, ensuring fledglings will have an appropriate wing loading. My objectives were to determine if mass recession by Chimney Swift <em>(Chaetura pelagica)</em> nestlings is intrinsically controlled or facultatively adjusted by nestlings, …
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Variation in mass and wing loading of nestling American Kestrels: possible effects of nestling behavior and adult provisioning behavior
… (i.e. aerial insectivores), it is important that nestlings not gain excess weight. Nestlings in some species must attain an efficient wing loading just prior to fledging to facilitate mobility for hunting and evading predators. My objective was to examine the mass of nestling American Kestrels …
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Family Conflicts over Parental Care in the Blue Tit, Cyanistes caerleus.
… caeruleus. Experimental work mid-way through the nestling period investigates how nestlings solicit parental care through begging, and the food allocation rules of male and female parents. Nestling begging was found to relate to short-term hunger, but contrary to expectation, small nestlings did …
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Incubation temperature impacts growth, physiology and survival in nestlings of an open-cup nesting passerine
… incubation temperature influences variation in nestling growth and physiological development as well as survival may be of critical importance to bird conservation. I examined how variation in incubation temperature influences key aspects of nestling development in American robins (Turdus …
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Cooperative breeding and delayed dispersal in the Pale chanting goshawk, Melierax canorus
… by becoming helpers at the nest. During the nestling period, co-breeding beta males provided prey at an equal rate to dominant males, that enabled polyandrous trios to undertake more frequent and successful breeding attempts in years of high prey abundance. The help provided by co-breeders …
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The pre-reproductive period in a tropical bird: parental care, dispersal, survival, and avian life histories
The period between offspring birth and recruitment into the breeding population is considered one of the least understood components of animal life histories. Yet, examining this period is essential for studies of parental care, dispersal, demography, and life histories. Studies of the …
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THE ROLES OF FOOD AND PREDATION IN SHAPING ADAPTIVE AND MALADAPTIVE BEHAVIORS IN POSTFIRE BIRD SPECIES
… nest sites with the most moderate microclimates. Nestlings reared in colder nest sites gained mass more slowly and experienced retarded skeletal growth while parents suffered costs associated with hot microclimates; incubating females reduced their nest attentiveness and doubled their nestling …
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THE ROLES OF FOOD AND PREDATION IN SHAPING ADAPTIVE AND MALADAPTIVE BEHAVIORS IN POSTFIRE BIRD SPECIES
… nest sites with the most moderate microclimates. Nestlings reared in colder nest sites gained mass more slowly and experienced retarded skeletal growth while parents suffered costs associated with hot microclimates; incubating females reduced their nest attentiveness and doubled their nestling …
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Moult as a dynamic link in the annual cycle of birds: insights from seabirds and a long-distance migratory raptor
… number of secondaries. I also explore whether nestlings grow flight feathers of equal quality as adults in a long-distance migratory raptor. The study of feather quality in birds is still in its infancy, but the few studies to date indicate that chicks compromise feather quality to minimise …