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 12 of 12 for “"Male-male competition"”.
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The Role of Male Vocal Signals During Male-Male Competition and Female Mate Choice in Greater Prairie-Chickens (<i>Tympanuchus cupido</i>)
… role in aggression, territorial defense, and female choice. The acoustic structure of vocalizations is influenced by physical constraints on the vocalizer, suggesting a potential for discrimination among individuals. In the lek-mating Greater Prairie-Chicken (<i>Tympanuchus cupido</i>), male …
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The role of male-male aggressive signals in reproductive isolation between two hybridizing warblers
… the dynamics of the hybrid zone, both via female mate choice and male-male competition. In many species the same song functions for both female mate choice and male-male competition. However, some species, such as the Parulidae Warblers, sing songs with specific functions, where one song is …
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Speciation and the evolution of male breeding coloration in darters
… spectabile). First, I quantified variation in male breeding coloration across multiple populations of E. caeruleum and E. spectabile using digital photography and image processing software. Male color traits in both species can be categorized as “blue” and “red” components, which are based on …
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After all, what do wasps want? The choice of sexual partner in the paper wasps Polistes
… fitness. This is particularly important when females are genetically monogamic and must store male sperm for a long time and when incestuous copulations may increase probability for the expression of recessive deleterious alleles. Social paper wasps like Polistes fit this situation, but …
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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
… from December to February (wet season). Females were larger and heavier than males. Males spent relatively few nights in activity call in the chorus, with respect to the length of the breeding season. The number of males and females present in the pond was positively correlated, but no …
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Behavioural, microhabitat, and phylogenetic dimensions of intrasexual contest competition in combatant monkey beetles (Scarabaeidae: Hopliini)
… overwhelmingly been studied in the context of female choice, but there is evidence that male-male competition can also drive evolution. Recent reviews of the intrasexual competition literature have developed several hypotheses of weapon divergence in both allopatry and sympatry and have suggested …
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A Tale of Two Butterflies: The Effect of Larval Social Environment and Circadian Rhythms on Mating Behavior in Bicyclus anynana and Heliconius hewitsoni
… number of factors from sexual ornamentation to male-male competition; and, 2) when an organism courts, be it daily, monthly, or seasonally. Both aspects are especially important for gregarious species as mistakes in either can incur high costs to overall fitness. My research focuses on using …
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Intrasexual selection and warning color evolution in an aposematic poison dart frog
… dissertation, I investigated the potential for male-male competition to impact the warning color evolution of a species of poison frog. I focused my work on an exceptionally bright and toxic population of the strawberry poison frog (Oophaga pumilio) where males are brighter than females, a …
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Place Matters: An Evolutionary Approach to Annie Proulx's "The Half-Skinned Steer"and "Wamsutter Wolf"
In Annie Proulx's interview with Charlie Rose, she states that her stories come "from place." Ecocriticism has been the predominant lens with which to understand Proulx's work; however, ecocriticism's nebulous tenets and theoretical deficiencies perpetuate sentimental pastoralism of geographical …
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Sexual Selection and Mate Preference in Astatotilapia Burtoni
… variables can prime the social behaviors of males and females. Here we sought to better understand this phenomenon with two studies that ask the following questions: (1) Does social environment and rank shape spawning behaviors and outcomes of males? and (2) Does the visual ecology of females …
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The Importance of the Multicomponent Display in Sexual Selection of Black Morph Girardinus metallicus (Pisces: Poeciliidae)
… courtship and aggressive display. Black morph males exhibit black ventral coloration including the gonopodium (copulatory organ) and yellow in the non-black areas of their bodies. I investigated the effects of common anesthetics on coloration measurements of <em>G</em>.<em> metallicus</em>. I …
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Unravelling the ecological trade-offs in behavioural and physiological sexual traits
… will have direct impacts on the risk of mate competition and the opportunity for mate choice. At the same time, biotic environmental changes in the environment could have impacts on nutritional availability, and therefore the condition state of individuals.<br/><br/>In Drosophila melanogaster, …