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 19 of 19 for “"diet breadth"”.
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Diet Breadth Evolution and Diversification of a Generalist Insect Herbivore
… host plants (bottom-up) influence an herbivore's diet breadth. In my meta-analysis evaluating the relative important of top-down and bottom-up forces on insect herbivore fitness, I found that herbivores usually have greater performance on better quality plants and in the absence or reduction of …
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Arthropod Predation in Brassica Agroecosystems: Effects of Latitude, Community Composition, and Diet Breadth
… whether this gradient extends to agroecosystems. Diet breadth of an arthropod predator can influence whether a predator can adequately control resident herbivore populations and can impact predation in a community context by determining whether predatory taxa will compete over shared prey, attack …
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Effects of resveratrol on development of three lepidopteran species varying in diet breadth
… do not encounter resveratrol in their natural diets. In this study, I examined the effects of resveratrol on growth and development of three species of lepidopterans: the navel orangeworm Amyelois transitella (Pyralidae), a nut-feeding generalist with several hostplants that produce …
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Understanding How Whole Genome Duplication in Plants Impacts Herbivore-plant Interactions
… incorporate novel polyploid hosts into their diet, but that these host shifts may come at a fitness cost. These results demonstrated that a specialist herbivore was impacted by the immediate effects of WGD, yet we know that herbivore preference and performance are also dictated by herbivore …
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Evidence of Climatic Influence on Subsistence Strategies at Sage Hen Springs, Nevada
… of upland spring ecozones, and an increase in diet breadth during the Middle and Late Archaic. Here, I present data collected from the Sage Hen Springs site in northwestern Nevada during a Phase II testing project conducted by the BLM and an analysis of these data focusing on patterns of …
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Prey Selection by Young Lemon Sharks (Negaprion brevirostris) at Chandeleur Island Nursery Habitats with a Comparison to Three Other Co-Occurring Shark Species
… sharks use these nursery habitats, I measured diet and prey availability of young of the year and juvenile lemon sharks from 2009 to 2010. Young lemon sharks at the Chandeleur Islands have a relatively reduced diet breadth in comparison to those from nurseries in Bimini (Bahamas) and the …
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Food Habits of Coyotes and Red Foxes in Western South Dakota As Determined By Fecal Analysis
… to determine if coyotes and red foxes exhibited diet overlap in areas where they are sympatric. Fecal samples of both species were collected in 1998 and 1999 in the west central (Haakon and north Jackson counties), northwest (Harding County), and Black Hills (Lawrence, Pennington and Custer …
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WHY THE XWISTEN CROSSED THE RIVER: LITHIC TRANSPORT STRATEGIES ON THE CANADIAN PLATEAU
… in the Mid-Fraser by pairing the logic of diet breadth model with the lithic assemblage recovered during the 2008 excavations at the Bridge River site. My sample consists of those tools, cores, and debitage (detritus from stone tool production and maintenance) recovered from housepits 20, …
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WHY THE XWISTEN CROSSED THE RIVER: LITHIC TRANSPORT STRATEGIES ON THE CANADIAN PLATEAU
… in the Mid-Fraser by pairing the logic of diet breadth model with the lithic assemblage recovered during the 2008 excavations at the Bridge River site. My sample consists of those tools, cores, and debitage (detritus from stone tool production and maintenance) recovered from housepits 20, …
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Exploring the breeding diet of the Black Sparrowhawk (Accipiter Melanoleucus) on the Cape Peninsula
This study investigates the diet of breeding Black Sparrowhawks (Accipiter melanoleucus) on the Cape Peninsula of South Africa. Macro-remains of prey were collected from below and around the vicinity of nests throughout the breeding seasons of 2012 and 2013. These prey items were then identified …
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Hunting Specialisation and the Broad Spectrum Revolution in the Early Epipalaeolithic: Gazelle Exploitation at Urkan e-Rubb IIa, Jordan Valley
… Recent discussions of Epipalaeolithic diet breadth have concentrated on the end of the Pleistocene (Munro 2001, 2003, 2004, 2009; Stiner 2001; Stiner & Munro 2002; Stiner et al. 1999, 2000; Stutz et al. 2009) and have been directed towards explaining changing subsistence patterns …
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Annual Food Habits of Northern Pike in an Eastern South Dakota Natural Lake
… carp, and invertebrates. Larger northern pike diets consisted mostly of larger common carp, young-of-the-year crappies, leopard frogs Rana pipiens, and occasionally walleyes. Northern pike fed heavily in the winter and during the post spawn period, while consumption was lower in the summer. …
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Ecology of the Verreaux's eagle Aquila verreauxii in natural and agriculturally transformed habitats in South Africa
… to increase hunting effort or diversify their diet and this can have negative consequences for fitness or demographic parameters. Agricultural landscapes are therefore rarely considered important in the conservation of top predators. The Verreaux's eagle Aquila verreauxii has experienced loss …
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Habitat variation effects on cavity-nesting bee fitness, community assemblages, and parasite interactions in the Colorado Front Range
… solitary bee fitness traits including diet breadth and quality, provisioning ability, reproduction and brood development, parasite abundance, and community network metrics. This was done by deploying artificial nesting boxes in the ponderosa pine forest of Boulder County, CO that either …
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Late Holocene Logistical and Residential Settlement in Interior Santa Rosa Island, California: A Comparative Analysis of Four Rockshelter Sites
… that were formulated from the perspective of the Diet Breadth and Central Place Foraging (CPF) models from Human Behavioral Ecology (HBE). To test each hypothesis, I use four lines of evidence: radiometric dating (radiocarbon), faunal analysis (primarily marine fauna), stable isotopic data from …
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Smelt (Retropinna retropinna) population dynamics and predation by rainbow trout (Salmo gairdneri) in Lake Taupo
… and insects present there were included in their diet. A few smelt either failed to spawn at two years old or survived spawning. These grew rapidly, fed on larval bullies (Gobiomophus cotidianus) and spawned in late winter. Juvenile smelt reached 28-34mm FL after one year, 40-55mm FL after two …
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Productivity and Trophic Interactions in the Missouri River Impoundments
… quantitative insight into energy transfer and diet breadth of each species. Linkages between Sander spp. diet and hybridization have yet to be addressed though likely important. I also wanted to develop protocols that can be used to monitor trophic linkages and energy flow using stable isotope …
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Influence of Forest Management on Bumblebee-Plant Networks and Community Compositions in Eastern Kentucky Forest Openings
… the variation in bee composition and their dietary breath. A lack of reliable data also hinders assessing long-term population trends for many bumblebee species, precludes the reconstruction of historic plant-pollinator network structure, and elucidation of species-specific habitat …
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Feeding Ecology of Invasive Catfishes in Chesapeake Bay Subestuaries
… revealed that sample size was sufficient for diet description, though 1,000 – 1500 stomachs were needed per river. Blue Catfish are opportunistic generalists that feed on a broad array of plant and animal material. Logistic regression models reveal that Blue Catfish undergo significant …