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 9 of 9 for “"Nest Defense"”.
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The nest defense and nest-destroying behaviors of house wrens
Presentations of three potential nest intruders were used to investigate house wren nest defense behavior, while regular nest box checks provided information regarding house wren nest-destroying behavior. During nest defense trials, male wrens were typically more active in defense than females in …
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Effect of predator type, season, brood size, and West Nile Virus infection on the nest defense behavior of male and female Eastern Bluebirds
<p>The intensity of nest defense by birds can be influenced by many factors, including a parent's sex, brood size, stage of breeding season, type of predator, and physical condition. Because previous studies have produced conflicting results concerning the effects of these factors on the nest …
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Parental Investment and Male Ornamentation in the Eastern Bluebird (Sialis Sialis)
… is usually measured as the rate at which nestlings are provisioned. However there are other forms of parental investment. The purpose of this study is to quantify the relationship between two measures of parental investment and their association with structural plumage coloration in male …
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Avian nest predation: relationships with landscape characteristics and influences on adult and nestling behavior.
Nest predation is the leading cause of reproductive failure in birds. As a result, many studies have sought to understand what factors influence nest predation as well as the ways in which birds respond to predation. However, identifying the factors that lead to variation in nest predation has …
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Behavioral and molecular mechanisms of pheromone transmission in the honey bee (Apis mellifera)
… their fitness, including reproductive dominance, nest defense, and cooperative brood care. In honey bees, there are two distinct pheromones emitted by larvae, brood pheromone and (E)-beta-ocimene. By integrating behavior, chemical ecology, and transcriptomics, this dissertation analyzes several …
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Investigating Reproductive Phenology and Alloparental Care in Leuciscid Fishes using Niche Theory Approaches
… reproductive mutualism of leuciscids known as nest association, a form of alloparental care characterized by an adult of one species guarding the offspring of another. I conducted this study with the leuciscid community of Toms Creek in which Bluehead Chub Nocomis leptocephalus is the primary …
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The evolution and functional morphology of trap-jaw ants
… power-amplified mandibles used for prey capture, nest defense, and individual escape from predators. Insects are the most diverse and numerically abundant animal group on the planet. One feature that contributed to their evolutionary success was the diversification their mouthparts. From an …
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Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (tachycineta Bicolor)
… are functionally referential and provide their nestlings with information about the level of threat predators may pose. Although several investigators have examined the responses of nestlings of species with open-cup nests to the anti-predator calls of adults, few have conducted such studies …
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The neural regulation of fatherhood, insights from the anemonfish amphiprion ocellaris
… caregivers, spending more time in the nest and displaying a more total parental behaviors compared to females. Additionally, males showed higher levels of the circulating steroid hormone 11-ketotestosterone (11KT), which remains stable throughout the breeding cycle, indicating high …