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 “"Feeding Preference"”.
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Cyanogenesis and the feeding preference of Acraea horta (L.) (Lepidoptera : Acraeinae)
… of herbivores and plant toxins: Lepidoptera feeding on cyanide-producing plants.
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Preference and performance of the Wild Indigo Duskywing (<i>Erynnis baptisiae</i>) on its native host Yellow Wild Indigo (<i>Baptisia tinctoria</i>) and on the introduced plant Crown Vetch (<i>Securigera varia</i>)
… of this host shift by comparing butterfly preference (larval feeding and female oviposition) and performance (pupal weight and pupation success) of two distinct butterfly populations, on both native and introduced plants. Caterpillars reared on the native plant had significantly greater …
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Juvenile Green Turtle (chelonia Mydas) Foraging Ecology:feeding Selectivity And Forage Nutrient Analysis
… whether juvenile green turtles showed a feeding preference by comparing prey items in the diet to the availability of those items in the habitat, 2) identify species for which there was selection or avoidance, 3) identify nutritional factors determining selection or avoidance of prey …
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Behavioral and Physiological Aspects of Self-Selection by the Corn Earworm, Heliothis Zea
… on corn silks as early instars but change their feeding preference to corn kernels as they mature. Within the corn kernel, final instar larvae prefer to feed on germ but will always eat some of the endosperm. In the laboratory, germ-fed larvae grow more efficiently than endosperm-feeders, eating …
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Habitat ecology of the native subtidal snail, Lacuna vincta, in the Gulf of Maine and the impact of two introduced species
… in order to examine the seasonal abundance, feeding preference, and growth of snails on nine different algal species. The results showed that there were differences in the seasonal abundance patterns of L. vincta populations on different algal species. However, the snail populations in all …
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The foraging strategy of Diadema antillarum (Philippi) (Echinodermata: Echinoidea)
… demonstrate that these urchins have a strong feeding preference for algal turf. Seasonal variation in the abundance of this preferred food item results in increased incidences of live coral predation. Experimental manipulations demonstrate that over the short term food availability is more …
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Aphids as vectors of peanut mottle virus
… and with the Florigiant variety of peanuts. In feeding preference tests, all three aphid species tested showed a preference for settling onto a host, regardless of the host species used, to wandering at random in the feeding arena and not feeding on any host plant. A. craccivora showed the …
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Tropicalisation of temperate seagrass meadows in Western Australia: Predicting the impact of tropical herbivorous fishes on temperate seagrass meadows
… and 2016/17, as well as in situ and mesocosm feeding preference experiments, this study attempted to estimate the grazing rates and impact that the growing abundance of S. fuscescens may have in temperate seagrass meadows. Shifts in the grazing rates on seagrass between 2001 and 2016/17 were …
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Life cycle and host preferences in the Agapanthus borer (Neuranethes spodopterodes)
… the female choice. There appears to be no preference from the larva during feeding. The larva fed equally on all the six Agapanthus species including A. africanus (p>0.05). This shows that the chemical composition of these species is closely related. Since the larva has no feeding …
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Life cycle and host preferences in the Agapanthus borer (Neuranethes spodopterodes)
… the female choice. There appears to be no preference from the larva during feeding. The larva fed equally on all the six Agapanthus species including A. africanus (p>0.05). This shows that the chemical composition of these species is closely related. Since the larva has no feeding …
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Linking plant traits and herbivory in grassland biodiversity-ecosystem functioning research
… plant growth and defense strategies, herbivore feeding preferences, and primary production in terrestrial plant communities. I empirically tested these proposed linkages in laboratory and field experiments carried out in the understudied grasslands of Inner Mongolia, China. I found that a …
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Attractant properties of chemical constituents of the green macroalga Ulva and their response effects on the commercially important sea urchin Tripneustes gratilla
… is being carried out to understand sea urchin feeding preferences. Feeding preference is related to the attractiveness/palatability of the feed, which is thought to be based on its chemical composition. Since an unpalatable feed will result in the poor quality of the organism, evaluating the …
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Ecology of the stalk borer Papaipema nebris (Guenee), (Lepidoptera:noctuidae), in the southwestern Virginia no-till corn agroecosystem
… overlap occurred between adjacent instars. In feeding preference tests with first instar larvae using either leaf disks or stem sections, higher numbers of larvae fed on grasses, such as orchardgrass, Dactylis glomerata L. or fescue, Festuca arundinacea Schreb., compared to numbers feeding on …
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Economic injury levels and feeding studies for the potato flea beetle, Epitrix cucumeris (Harris), in Manitoba
… for the duration of the season. Numbers of feeding punctures per leaflet were counted in the lower, middle, upper and upper non-terminal strata of plants. The yield of tubers was weighed, graded and examined for common scab, Streptomyces scabies (Thaxter). Without early season injury by …
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Nutritional Ecology of White-Tailed Deer: Assessment of an Index to Diet Quality and a Repellent
… to rumen microbes, resulting in the reduction in feeding by large herbivores. I hypothesized that chemical application of tannins to soybeans and other forages would provide a non-lethal method to reduce crop depredation in areas susceptible to deer damage. I designed an experiment to test the …
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Deer Preference for Corn Hybrids and Husbandry Practices During the Growing Season
… Currently, no information is available on preference of white-tailed deer (Odocoileus virginianus) for corn hybrids during the growing season and how preference might affect depredation patterns. I used captive adult female white-tailed deer (n = 4) in corn food plots to study the effect of …
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Bean Leaf Beetle: Impact of Leaf Feeding Injury on Snap Beans, Host Plant Choice and Role as a Vector of Bean Pod Mottle Virus in Virginia
… over soybean. Field studies did not showed no preference. A survey was conducted on the Eastern Shore of Virginia determine the epicenter of BPMV. Soybean leaves and beetles were collected and assessed for BPMV by ELISA or TBIA. Beetles at the ESAREC were BPMV-positive upon emergence from …
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Behavioral and biochemical processing of natural and synthetic xenobiotics in the western honey bee apis mellifera
As a eusocial insect, Apis mellifera, the western honey bee, accomplishes many tasks, including acquisition of food, defense against enemies, and reproduction, through division of labor. In this dissertation, I examined whether honey bees also exploit division of labor in the detoxification of …
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Feed attractants in aquaculture - the chemical composition of aquacultured Ulva lacinulata (Chlorophyta)
… T. gratilla has demonstrated hierarchical feeding preference to this aquacultured Ulva over other seaweed species. Inclusion of this alga in the diet of this urchin has been shown to act as a feed attractant as well as act as a feed stimulant, but the mechanisms for this remain unknown. The …