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 14 of 14 for “"Interference competition"”.
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Chemically-Mediated Mate Location and Recognition in Longhorned Beetles (Coleoptera: Cerambycidae)
… larval host, the mating strategy is scramble and interference competition among males for females. I also find that large body size confers a mating advantage in aggressive competition among male cerambycid beetles. I test the hypothesis that contact pheromones mediate mate recognition in four …
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Waterhole Dynamics and Chemical Signals of African Elephants (<i> Loxodonta Africana </i>)
… was rare, suggesting the workings of interference competition by elephants. Intraspecific aggregation at waterholes can facilitate reproductive communication in elephants, often via chemical signals. This study also determined behaviorally via biological assays (June 2006-June 2007) …
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Effects of prey distribution on resource defense, foraging behavior, and growth in stream-dwelling Arctic char (Salvelinus alpinus)
… during resource depletion (i.e., exploitative competition) to direct attacks and monopolization (i.e., interference competition). Spatial distribution of drifting prey provides a unique form of resource heterogeneity that may shape resource defense, foraging, and growth in stream salmonids. I …
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Behavioural causes and consequences of sexual size dimorphism in an apex predator species.
… interactions such as size-dependent interference competition during the first year of life plays a key role in maintaining intraspecific size variation and size dimorphism in the wild population. Experimental work revealed the occurrence of a behavioural syndrome, where the rank order …
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FEMALE COMPETITION AND THE ROLE OF TESTOSTERONE IN A POLYGYNOUS SYSTEM
… a similar function in females. Female-female competition for resources is often associated with high testosterone, both within females and in comparison to males. Positive associations between testosterone and competition are most likely to be seen in systems with high female-female …
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FEMALE COMPETITION AND THE ROLE OF TESTOSTERONE IN A POLYGYNOUS SYSTEM
… a similar function in females. Female-female competition for resources is often associated with high testosterone, both within females and in comparison to males. Positive associations between testosterone and competition are most likely to be seen in systems with high female-female …
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MULTI-PARTNER MUTUALISMS: INTERACTIONS AMONG THE MOUNTAIN PINE BEETLE AND TWO OPHIOSTOMATOID FUNGAL ASSOCIATES
… To address the second question, I tested for competition between the two fungi on artificial media. Growth of each species slowed when it encountered media occupied by the other species, indicating competition; however, both species eventually invaded media occupied by the other species. …
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MULTI-PARTNER MUTUALISMS: INTERACTIONS AMONG THE MOUNTAIN PINE BEETLE AND TWO OPHIOSTOMATOID FUNGAL ASSOCIATES
… To address the second question, I tested for competition between the two fungi on artificial media. Growth of each species slowed when it encountered media occupied by the other species, indicating competition; however, both species eventually invaded media occupied by the other species. …
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The Effects of Food, Cover and Competition on Demography, Dispersal and Density of Voles
… for either species. Sixth, interspecific competition alone seemed unlikely to produce the habitat segregation observed in the nature. Rather, differences in habitat preference, dispersal ability, and resident effects seem likely to couple with interference competition to explain …
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The importance of density-dependent mechanisms in determining cohort survival in largemouth bass
… processes may also contribute. Asymmetrical competition can also explain this phenomenon if early cohorts exploit prey resources prior to later cohort swim-up or through interference competition. In a manipulative pond experiment, I reduced the early cohort in 4 of the 8 ponds. Pond in which …
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Habitat Interference by Exotic Axis Deer (Axis axis) on Native White-tailed Deer (Odocoileus virginianus) in Texas
… species being superior m a different form of competition (interference or exploitative). Vehicle surveys were conducted to determine locations of white-tailed deer and axis deer over two survey season. The data were used to evaluate possible changes in habitat selection by white-tailed deer …
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Plant-flower visitor interactions in the Sacred Valley of Peru
… from the surveys to suggest that honeybees used interference competition and displaced other species. It was suggested that because specialised rare species are frequently dependent on a core of generalist taxa honeybees may play an important role for the possibilities of rare species to persist. …
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Molecular analysis of the interactions between starter cultures during wine fermentation
… yeasts take place at various levels, including interference competition, exploitation competition, and exchange of metabolic intermediates, among others. Some interactions could be a simple consequence of the metabolism of each yeast in a context where metabolic intermediates and end products of …
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The consequences and implications of ecology on body size distributions in social insects
… food resources, abiotic environment, and competition) among populations is hypothesized to alter colony investment into worker body size. I also use genetic data to determine if the populations of P. megacephala represent cryptic species or if morphological differences are attributable to …