Global ETD Search
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Showing 1 to 10 of 10 for “"Predation (Biology)"”.
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A study of avian nest predation at Audubon Acres in Chattanooga, TN
Predation is believed to be the primary cause of nesting mortality among North American migratory land birds. High rates of nest predation can jeopardize avian reproductive biology by affecting life histories and habitat selection. Artificial nests are commonly used to study nest predation because …
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Prey Selectivity by naticid gastropods from tertiary sediments of the United States coastal Plain
… possible extinction (Vermeij, 1987). Naticid predation on molluscan assemblages is one of several examples used to support the hypothesis of escalation. </p><p>Three Oligocene bivalve prey species, Astarte triangulata (547 specimens), Corbula rufaripa (2186 specimens), and Scapharca invidiosa …
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The effects of mass extinction on escalation of the naticid gastropod predator-prey system at the Eocene-Oligocene
… which states that biological hazards, such as predation, have increased through the Phanerozoic. This hypothesis has been extremely controversial due to the fact that it assumes that biotic factors, such as predation, have had an important role in evolution. Several studies have focused on the …
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Chemically-mediated prey responses: invasive brook stickleback induced changes in behavior and life history of larval long-toed salamanders
… life history, and are currently threatened with predation by invasive fish. To investigate this issue, we first initiated a behavioral assay to test the null hypotheses that predator type and diet have no effect on long-toed salamander (Ambystoma macrodactylum) behavior. We exposed individual …
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A paleozoological perspective on predator extermination and white-tailed deer (Odocoileus virginianus Boddaert) overabundance in central Texas.
… and modernity are expected given that a lack of predation likely has increased intraspecific competition for forage among deer resulting in smaller body size today. In fact modern deer from settings without harvest pressure are significantly smaller than those from harvested areas and from …
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Effects of Sublethal Copper Exposure on Escape Behavior and Growth of Rana pipiens Tadpoles
… not support the hypotheses. Although the rate of predation was lower, tadpoles exposed to higher Cu concentrations were on average, 1.47 cm in total body length. Those exposed to 0.93 mg/L averaged 0.86 cm. After being placed into clean water, treatment tadpoles recovered after 20 days.
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Understanding the role of Stylochus ellipticus as a predator of Crassostrea virginica in Chesapeake Bay tributaries
Predation may be a key component of the unsuccessful restoration of the Eastern Oyster (Crassostrea virginica), a former keystone species in Chesapeake Bay. Here, I examine the polyclad flatworm Stylochus ellipticus and its potential role as an important predator of C. virginica. Using …
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Predator Recognition Learning in Rainbow Darters (Etheostoma Caeruleum)
I investigated whether rainbow darters (Etheostoma caeruleum) could learn to associate cues from an unfamiliar predator with a known fright stimulus (darter alarm cues) through the process of classical conditioning. Darters in the experimental group (n=32) were trained using their alarm cues paired …
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Interference in White Bass Reproduction by Two Introduced Predators in Barren River Lake, Kentucky
… times and evidence of egg and larval fish predation, it is likely that yellow bass are directly impacting white bass spawning success through reproductive interference and the consumption of white bass offspring. Schoener’s index values revealed a significant degree of dietary overlap …