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 “"Poecilia reticulata"”.
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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 (Houde 1997; …
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Host-parasite co-evolution and genetic variation at the major histocompatibility complex in the Trinidadian guppy (poecilia reticulata)
… 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 populations of …
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Behavioral Measures and Ecological Correlates of Vision in Poeciliid Fishes
… 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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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 …
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Molecular Evolution of Visual System Genes in Fishes
… sensitive (LWS) opsins of the guppy (Poecilia reticulata). The guppy is shown to possess multiple LWS opsins that have accumulated differences at functionally important amino acid sites since duplicating. Chapter Three focuses on the guppy’s main predator, the pike cichlid Crenicichla …
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Cognitive Abilities in Fish: Biological Predictors and Impact on Reproductive Success
… 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 cognition …
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Cognitive Abilities in Fish: Biological Predictors and Impact on Reproductive Success
… 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 cognition …
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The maintenance of variation in Cyprinodontiformes
… Two extreme examples of this are the guppy (Poecilia reticulata) and the bluefin killifish (Lucania goodei), two freshwater species in the order Cyprinodontiformes with extensive within-population color pattern variation found among males. I use these two species as case studies to examine …