Global ETD Search
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Showing 1 to 20 of 25 for “"Sticklebacks"”.
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Neurogenomic dynamics following social interactions in male threespined sticklebacks
… social interactions in male threespined sticklebacks (Gasterosteus aculeatus), a small fish famous for their rich behavioral repertoire. In chapter one I provided the detailed overview of the research included in this dissertation. The second chapter tested the hypothesis that there are …
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Conspicuous female ornamentation and male mate preference of Threespine Sticklebacks (Gasterosteus aculeatus)
… aculeatus) populations. Although female sticklebacks often exhibit a preference for red male throat coloration, the possibility of sexual selection on females has been little studied. Moreover, in those species in which female ornaments have been examined, research has often been limited …
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Testing models of the adaptive evolution of consistent individual differences in behavior using sticklebacks
… I measured the behavior of threespined sticklebacks in a foraging context. Foraging provides an ideal context because competition is an inherent quality of any foraging group of individuals, social interactions will occur among foragers, and it is easy to manipulate the level of …
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Using parasite communities to discriminate between sympatric morphs of threespine sticklebacks (Gasterosteus aculeatus) in lake Þingvallavatn, Iceland
… Fish of three ecotypes of threespine sticklebacks from lake Þingvallavatn (lava, mud and deep-water) were examined for parasites and linear discriminant analysis (LDA) employed to assign hosts to their respective habitats. The results give high accuracy in distinguishing deep-water …
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The neuroendocrine and molecular mechanisms underlying stress-induced maternal effects in the threespine stickleback
… I studied maternal effects in threespine sticklebacks (Gasterosteus aculeatus), with the goal to describe a maternal effect on the physiological stress response and the underlying molecular mechanisms by which the non-genetic maternal effects on physiology and behavior occur in …
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Life history of marine threespine stickleback in Oyster Lagoon, British Columbia
Marine populations of three spine sticklebacks (Gasterosteus aculeatus) are possible ancestors of the many of the divergent freshwater populations of this species found along the glaciated coast of British Columbia. Until this study, the life history and reproductive behaviours of marine population …
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A multipronged approach to understanding how genes contribute to social behavior in threespine stickleback
… the already robust behavioral assays. Threespine sticklebacks are a classic system for the study of behavior, ecology, and evolution. A growing number of quantitative trait loci (QTL) and gene expression studies are identifying genes related to ecologically-important social behaviors in …
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Cognitive variation in threespined stickleback (Gasterosteus aculeatus)
… variation in cognition in threespined sticklebacks. This is done from four different angles. First, I tested the hypothesis that learning is part of an overall suite of correlated traits related to how an individual copes with changes in the environment, and that trade-offs between …
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Microhabitat requirements of the great crested newt (<i>Triturus cristatus</i>) in a woodland area
… when raised in the presence of caged predatory sticklebacks compared to controls. Great crested newt larvae utilised vegetated microhabitats for a significantly greater proportion of the time when in the presence of caged predatory sticklebacks but not when faced with non-predatory crucian carp. …
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Fish and Amphibian Occurrence in Waterfowl Production Area Wetlands in Minnesota During 1992
… promelas) preferred open water and brook sticklebacks (Culaea inconstans) preferred emergent vegetation. Fish populations were determined for 11 wetlands using the Kushlan throw trap. Six of 11 wetlands contained fathead minnows with population estimates ranging from 10,000 to …
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Mothers transfer information via eggs: effect of mothers' experience with predators on offspring
… the growth and behavior of juvenile threespined sticklebacks (Gasterosteus aculeatus). Exposure to a predator during oogenesis caused females to produce larger eggs and heavier clutches, but there was no effect on the number of eggs per clutch. The concentration of cortisol was higher in …
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Fishing For The Evolutionary Bases Of Female Ornamentation
… ornaments, I find that the red throat in female sticklebacks is potentially a nonadaptive trait that has arisen due to a genetic correlation between the sexes; thus female conspicuous traits do not necessarily result from adaptive processes related to sexual selection on females.
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Exploring the fathering brain: insights from neural activation
… measured brain activation in male three-spined sticklebacks. First, we developed a method for quantifying brain activation by measuring the expression of an immediate early gene using whole mount in situ hybridization (WISH) (Chapter 1). The method uses mini mRNA probes that are capable of …
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Decoupling aggression and risk-taking: patterns of variation in two species of freshwater fish
… aggression and the relationship between them in sticklebacks that grew at different rates under two different competitive regimes. In one treatment (the low interaction condition) food was dispersed, while in the other (the high interaction condition), food was clumped. Fish were fed to excess in …
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The origin of alternative phenotypes in fishes
… laboratory experiments showed that three-spined sticklebacks exhibit alternative phenotypes as a plastic response to physical environment and diet, demonstrating and supporting the idea that environmental inputs modulate the expression of traits through phenotypic plasticity during ontogeny. …
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The importance of predator behaviour on risk to prey
… to follow simplistic rules. I use three-spined sticklebacks predating upon invertebrate prey to test a range of ways in which prey risk was hypothesised to be affected by predator behaviour. The relationship between encounter rate and prey density has been recently shown not to be directly …
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Centromere identification and inactivation on a neo-Y chromosome fusion in threespine stickleback fish (Gasterosteus aculeatus)
… between the Pacific Ocean and Japan Sea sticklebacks.
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