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 “"guppies"”.
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Behavioral and Hormonal Flexibility Across Light Environments in Guppies (Poecilia reticulata)
… or mating behavior) (Sih et al. 2004a). Guppies (Poecilia reticulata) provide a great model system to study behavior. Guppies are small, freshwater tropical fish that inhabit still pools in swift-flowing streams, and the backwaters of small rivers in mountain forest areas of Trinidad …
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Cognitive Abilities in Fish: Biological Predictors and Impact on Reproductive Success
… pollutant, fluoxetine, on inhibitory control of guppies (Poecilia reticulata). I discuss how sex, dosage and body size influence the effects of fluoxetine, and the potential transgenerational impact of pollution on fish behaviour. In Chapter 3, I look at how the negative effect of inbreeding on …
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Cognitive Abilities in Fish: Biological Predictors and Impact on Reproductive Success
… pollutant, fluoxetine, on inhibitory control of guppies (Poecilia reticulata). I discuss how sex, dosage and body size influence the effects of fluoxetine, and the potential transgenerational impact of pollution on fish behaviour. In Chapter 3, I look at how the negative effect of inbreeding on …
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Host-parasite co-evolution and genetic variation at the major histocompatibility complex in the Trinidadian guppy (poecilia reticulata)
… yet to be resolved.In the present thesis, I use guppies (Poecilia reticulata) as a model to investigate the role of parasites in the maintenance of polymorphism in the MHC. In a study of spatial variation of both MHC and microsatellite variation, I find evidence to suggest that upstream …
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Behavioral Measures and Ecological Correlates of Vision in Poeciliid Fishes
… sought to investigate: (1) how Trinidadian guppies (Poecilia reticulata) perceive visual stimuli that vary in spatial detail and contrast, (2) correlates of eye size and eye investment across P. reticulata populations that experience different threats from predation and, (3) visual signaling …
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The maintenance of variation in Cyprinodontiformes
… for males with novel color patterns in guppies. This preference has been implicated as a factor in maintaining the genetically-determined color pattern polymorphisms found in male guppies, and inbreeding avoidance has been proposed as a mechanism to explain its evolution. Inbreeding …
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Various aspects of reproductive control in freshwater fishes
Male and female guppies (Poecilia reticulata) were treated with either methyl testosterone, cyproterone acetate (CA) (an antiandrogen) or a combination of the two steroids to determine effects on behavior, coloration, and gametogenesis. The antiandrogen did not fully block the effects of endogenous …