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 “"Operational Sex Ratio"”.
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Comportamento reprodutivo de Phyllomedusa rohdei Mertens, 1926 (Amphibia, Anura, Hylidae), na região de Saquarema, Estado do Rio de Janeiro, Sudeste do Brasil
… was revealed between the number of males and the operational sex ratio. Larger males predominated in the chorus when there was water in the pond, while smaller males predominated when the pond was dry. The matings were non-random in relation to the following variables measured on males: snout-vent …
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Multiple paternity and the breeding biology of the red-eyed treefrog, Agalychnis callidryas
… makes male anurans susceptible to direct intrasexual competition for fertilization opportunities at the egg mass. The red-eyed treefrog, Agalychnis callidryas, is one species in which pairs of males appear to simultaneously fertilize the clutch of a Single female. DNA fingerprinting revealed …
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Male Mating Success in Lemur catta
… the priority-of-access model, the impact of the operational sex ratio (OSR) on mating success, and the relationships between harassment and interruption of mating and mating success were tested. I found that male rank was positively correlated with the number of ejaculations and male mate order. …
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Encoding sex ratio information: automatic or effortful?
Operational Sex Ratio (OSR: the ratio of reproductively viable males to females in a given population) has been theorized and studied as a construct that may influence behaviors. The encoding of sex ratio was examined in order to determine whether the cognitive process underlying it is automatic or …
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The effect of environmental and social factors on the courtship and mating dynamics of the smooth newt, Triturus v. vulgaris
… production. Female receptivity and immigration patterns are thus the principle determinants of the operational sex ratio (OSR). According to the model, a male-biased OSR develops rapidly at the start of the season, but the strength of bias will depend on the breeding sex ratio. duration …
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Sexual selections in the northern fall field cricket, Gryllus pennsylvanicus: a manipulation of the adult sex ratio
The operational sex ratio has long been considered an important constraint on the structure of mating systems. The effects of an experimentally manipulated sex ratio on mating behavior and selection were investigated in a polygynous species, Gryllus pennsylvanicus, where the potential exists for …
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Salamander Mating Behaviors and Their Consequences for Individuals and Populations
… opacum). I studied female mating behavior, sexual selection, and the consequences of polyandry for individual females and salamander populations. I also compared the performance of several statistical approaches for analyzing genetic mating system data. The first chapter summarizes the …
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Costly Signaling and Social Valuation: A Multi-Method Examination of Social Information Processing
… Often, advertisements depict attractive, sexually suggestive models even when the image has little to do with the product message. Retail settings are also engineered to utilize attractive sales associates. Importantly, research demonstrates that incidental exposure to such sexual stimuli …