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 8 of 8 for “"reproductive costs"”.
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The importance of a double standard : inter sexual differences and cooperative breeding in the green Woodhoopoe
… patterns among cooperative species. First, the reproductive costs of delaying reproduction may not be as high as previously assumed in some cooperative species if, as in females of this species, birds delaying breeding tend to live longer than birds reproducing at maturity. Second, as …
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Rodents and Restionaceae : sex-specific plant-animal interactions in dioecious plants
… four-striped grass mouse (Rhabdomys). Mature, reproductive culms on female plants were felled down (mid way along the culm) in large numbers by Rhabdomys in order for it to access the seeds held terminally on culms. Male plants were largely unaffected due to their lack of seeds. Seeds acquired …
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Do females counter against costly males in the degu, Octodon degus?
… reproduction may result in females incurring reproductive costs from males. Females may counter against costly males through social support from cohesive relationships with other females. In plural breeders, social support may promote communal offspring care, improving the number of offspring …
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The acquisition and maintenance of dominance in male and female cooperatively breeding meerkats, Suricata suricatta
In group-living species with strong reproductive skew, acquiring a position of dominance is often essential for maximising fitness, and where the frequency of lifetime dominance acquisition is low, substantial variation in fitness among individuals can arise. However, even among dominant …
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Demography of a declining Dunlin (<i>Calidris alpina arcticola</i>): influences on adult survival and mate fidelity of an Arctic-breeding migratory shorebird
… populations, as while other demographic rates (reproductive output, breeding propensity) are comparable with North American Arctic-breeding C. alpina subspecies, both adult survival rates and estimated population growth remain relatively lower. I emphasize that conservation efforts should be …
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The costs and benefits of hosting colonial sociable weaver nests for arid zone savanna trees
… are not always reciprocally beneficial, but with costs and benefits that change in spatio-temporal contexts, especially in resource-constrained arid zone environments. The overall impacts of bird nesting, especially colonial species, on the growth and reproduction of host trees can be large, with …
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Fitness Consequences of Clutch Size Decisions and Mate Change in Black Brant
… fitness. I studied the fitness consequences of reproductive effort (Chapter 2) and mate change (Chapters 3-5) in black brant geese (Branta bernicla nigricans, hereafter brant), an Arctic nesting goose species with precocial young. I used a 25 year (1990-2014) dataset collected at the Tutakoke …