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Showing 1 to 10 of 10 for “"Brood Reduction"”.
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Maternal Effects on Brood Reduction in Common Grackles
… their productivity in the long term by adjusting brood size to food availability in the short term. Consequently, future research regarding the adaptive allocation of maternal effects in common grackles should focus on identifying the strategies of mothers in the short term that may increase their …
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Laying-Sequence Variation in Yolk Carotenoids of Eastern Bluebirds
… predicted that Eastern Bluebirds would exhibit a brood reduction strategy, with the first-laid eggs containing a higher concentration of carotenoids than the last-laid eggs. I also predicted that the egg mass and size would remain consistent across the clutch due to an increase in secondary …
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Reproductive Peformance of Great Egrets (Ardea alba) at High Island, Texas
… Texas. Breeding success, productivity, and mean brood size did not differ between years (U-test, P > 0.05). Fledging success at 21 days showed no significant difference between years, however fledging success at 28, 35, and 42 days decreased significantly between years (~15% reduction at 42 days; …
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Nesting Ecology Of Red-Headed Woodpeckers (Melanerpes Erythrocephalus) In Central Minnesota
… success, documenting the extent and timing of brood reduction, and detailing developmental milestones of Red-headed Woodpeckers in central Minnesota. Using a cavity camera, I monitored 61 nests throughout the nesting cycle in 2014 and 2015 and estimated nest success (from initiation to …
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Family Conflicts over Parental Care in the Blue Tit, Cyanistes caerleus.
… investment into individual offspring within broods of blue tits, Cyanistes 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 …
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Broad reduction and adoption in ring-billed gulls (Larus Delaworensis): the potential for inergenerational conflict
… size disparities during the early post brood completion period. Competitive asymmetries among chicks were associated with increased mortality rates among third hatched chicks despite the lack of evidence of a sibling feeding hierarchy. Fledging success in 1987 was greater than in 1988. A …
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Surviving Alpha: Using sequential analysis to examine the behaviours of Black-legged Kittiwake chicks during sibling pecking attacks
… against their siblings, which can result in brood reduction by facultative siblicide. Attacks are almost exclusively carried out by Alpha (first-hatched) chicks against Beta (second-hatched) chicks. Onset of this behaviour is attributable to food stress brought about by environmental …
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Conflict & Communication: Consequences Of Female Nest Confinement In Yellow-Billed Hornbills
… of chicks served as an efficient mechanism of brood reduction for nests with low paternal feeding rate. Chapter 4 investigates how females communicate need for nesting materials to males. Females altered the rate and structure of their begging calls when experimentally deprived of nest lining …
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Breeding ecology and related life-history traits of the hoatzin, Opisthocomus hoazin, in a primary rainforest habitat
… the A-chick survived and there is evidence for a brood reduction strategy. I observed egg size variation patterns both within the clutches and between the clutches. Approximately 80% of breeding attempts were carried out with auxiliaries. Units with alloparentals had a higher breeding success than …
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Costs and benefits of host use by brood parasitic birds
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms