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Showing 1 to 15 of 15 for “"Post-fledging survival"”.
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Population demography of lark buntings: post-fledging survival, fecundity, and breeding decisions
… reproductive productivity and juvenile survival on the breeding grounds are among the possibilities. To assess population declines, direct and reliable estimates of survival, fecundity, and dispersal are required. Consequently, I estimated demographic parameters (i.e., post-fledging …
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Intrabrood Dominance Hierarchies in Juvenile Red-Cockaded Woodpeckers: The Role of Early Social Environment On Post-Fledging Survival and Natal Dispersal
… adults through scramble competition. First-year survival favored males over females and dominant males over subordinates. Females were more dispersive overall than males, and subordinate males were more likely to disperse than dominants. The social environment prior to fledging influenced male …
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Nestling Diet, Quality, and Post-fledging Survival: Comparing Two Species of Aerial Insectivores in a Gradient of Agricultural Intensity in Saskatchewan, Canada
… effects on future life-stages, including the post-fledging transitional period to independence. In 2020 and 2021, using a comparative approach between two sympatric species, Barn Swallows (Hirundo rustica) and Tree Swallows (Tachycineta bicolor), following a scale-of-effect approach, I …
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Fitness and Implications of Reproductive Decisions for Black Brant Nesting on the Yukon-Kuskokwim Delta, Alaska
… to reduce fitness, either through reduced survival or reduced future reproductive investment. In the second chapter, human harvest of male brant was used as an experiment to examine effects of mate loss on fitness of female brant. Nineteen years of recapture/resighting and nesting data were …
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Age-specific mortality, pre- to post-fledging carryover effects, and the timing of fledging in altricial songbirds
… histories and offspring mortality as nest and post-fledging account for the vast majority of offspring mortalities. My research examined associations between juvenile mortality and traits (morphological and behavioral) across the nesting and post-fledging period in a community of songbirds to …
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Reproductive success and survival of the Common Grackle in central Illinois
… and 2019. I monitored 188 nests and tracked the survival of 53 fledglings for the 20-day post-fledging period. I found no evidence that demographic rates during the breeding season were driving the observed decline in Common Grackle populations in Illinois. Average clutch size was 4.26 (SE = …
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Piping Plover (Charadrius melodus) habitat selection, survival, and migration on New York barrier islands following natural and engineered habitat changes
… and after Hurricane Sandy and to investigate survival and migration of fledgling piping plovers within their first year. We studied piping plover nest-site selection, habitat, and abundance before (2010) and after (2015) Hurricane Sandy and engineered response. Before the storm, piping plovers …
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Behavioural ecology of lesser sheathbills Chionis minor at Marion Island
… assessed. The birds' reproductive output and post-fledging survival rates were estimated and probable factors limiting the population examined. Seasonal and spatial variations in the diet and foraging habits were related to the quality, availability and distribution of food, and the effects of …
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Investigating the causes of the decline of the urban house sparrow Passer domesticus population in Britain
… selection by foraging adults and over-winter survival were also studied. Data were collected during 2001-2003 from 9 study areas spread along the urbanisation gradient. Most sparrows in most study areas nested in or close to domestic gardens. Counts of territorial males declined by 28% between …
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Breeding Ecology and Productivity of Mallards and Mallard-grey Duck Hybrids in New Zealand
… in 0.16 of nests (SE = 0.16), and daily nest survival was 0.9789 (SE = 0.17). Cumulative nest survival ranged from 0.22 for nests along drainage ditches in Waikato to 0.61 when they were located along roadsides in Southland. Mean daily brood survival was 0.9816 (SE = 0.003) and cumulative …
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POPULATION DYNAMICS OF SPECIES RECOVERY: MULTISCALE DEMOGRAPHY IN RESTORED HABITATS
… needs at contrasting life stages (e.g., nesting, post-fledging). From 2015-2018, we surveyed male Golden-winged Warblers and measured vegetation attributes in 672 restored habitats in the Great Lakes (n = 215) and Appalachian Mountains (n = 457) regions of the breeding range. In addition to …
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Pre- to post-fledging carryover effects and the post-fledging ecology of the Dickcissel (Spiza americana)
The post-fledging period—defined as the time between when a bird leaves its nest and disperses or migrates—is a critical stage in the avian life cycle. Past research has identified survival during this stage as a key component in population growth and maintenance of avian species. Therefore, …
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Post-fledging ecology of an endangered species: The golden-cheeked warbler
… life-stages of an individual. I investigated the survival, behaviors and habitat use of endangered Golden-cheeked Warbler (Setophaga chrysoparia) fledglings in Texas. I monitored nests until fledging and tracked fledglings for at least four weeks after leaving the nest. I estimated survival rates …
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Habitat selection and survival of juvenile black-capped vireos during the post-fledging period
… and wintering ecology. Until recently, the post-breeding season, the period from the completion of breeding and the onset of migration, has been overlooked. During this period, juvenile birds independent of parental care must find food to build up fat reserves for migration and …
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The pre-reproductive period in a tropical bird: parental care, dispersal, survival, and avian life histories
… parental care after offspring left the nest (the post-fledging period) was greater than care during the nestling period. Prolonged care resulted in a clear trade-off for parents as they did not nest again until fledglings from the first brood were independent. Parents fed offspring for a prolonged …