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Showing 1 to 6 of 6 for “"prey selectivity"”.
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Prey Selectivity by naticid gastropods from tertiary sediments of the United States coastal Plain
… gastropod predators are highly selective of prey species in accordance with the Kitchell et al. (1981) cost-benefit model. In addition, earlier studies have demonstrated selectivity of drillhole siting and intraspecific prey size. This study focuses on prey selectivity by Oligocene naticid …
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Predation Vulnerability and Trophic Interactions of Pallid Sturgeon Scaphirhynchus albus
… with intensity regulated by behavioral (i.e., prey selectivity) and/or environmental conditions. In the case of a threatened or endangered fish, such as the pallid sturgeon, understanding trophic interactions will assist in implementing a successful recovery plan. Predation can play an …
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The Cost of Capturing Prey: Measuring Largemouth Bass Foraging Activity Using Glycolytic Enzymes (Lactate Dehydrogenase)
… foraging theory predicts that predators choose prey based on size, morphology, and behavior that maximizes the net energy gained per time spent foraging. For prey choice to be optimal, the ratio of energy gained to energy expended should be maximized. Activity costs associated with pursuit and …
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Effects of the Exotic Cladoceran Daphnia Lumholtzi (Sars) on the Growth Rate and Prey Selection of Bluegill Sunfish (Lepomis Macrochirus Rafinesque)
… bluegill sunfish (15-25, 30-40, and 50-60 mm). Prey selectivity values also were determined for each of the zooplankton species from the exotic community type for each of the tree bluegill size classes. Results indicated that food level had strong effects on growth rates of all bluegill size …
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DIET ANALYSIS OF NATIVE AND NON-NATIVE JUVENILE SALMONIDS IN A LAKE SUPERIOR TRIBUTARY
… of Lake Superior by using diet overlap and selectivity indices as measures of potential competitive interactions. Stomach contents and drift were analyzed for seven months in three habitat areas of the study stream. Stomach contents were obtained from 643 fish and yielded 6245 prey items, …
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Feeding Ecology of Invasive Catfishes in Chesapeake Bay Subestuaries
… (James, York, Rappahannock rivers). Cumulative prey curves 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 …