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Showing 1 to 7 of 7 for “"flathead catfish"”.
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Analysis of the impact of flathead catfish predation on the abundance of four centrarchid species
… impoundment in southwestern Virginia is the flathead catfish Pylodictis olivaris. The most numerically abundant fish in the reservoir are centrarchids, specifically bluegill Lepomis macrochirus, redbreast sunfish L. auritus, smallmouth bass Micropterus dolomieu, and spotted bass M. …
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Population Characteristics and Sampling Methods of Catfish for the James and Big Sioux Rivers
<p>Concerns about the sustainability of catfish populations that produce large fish have increased because of abundant media images of large catfish and improvements in specialized fishing equipment. This study will help biologists address these concerns by providing important information about the …
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The roles of predation, competition, and exploitation in the community dynamics of the New River in West Virginia
… rock bass (Ambloplites rupestris), and flathead catfish (Pylodictis olivaris) populations were quantified to evaluate the status of these stocks and to aid specification of the model. Analysis and application of the model were designed to address three research objectives, which were to …
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Mercury Concentrations in Fish from the Guadalupe River, Texas: Relationships with Body Length and Trophic Position
… higher in top predators including longnose gar, flathead catfish, and striped bass, and lower in moderate and low trophic level fishes, including Mexican tetra, threadfin shad, and suckermouth catfish. Within the five sites examined, the average Hg concentration in each species was higher in …
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A Comparison of the Pectoral Spines in Virginia Catfishes
Catfish pectoral spines are an anti-predator defense mechanism. They can be bound or locked, making the fish harder to swallow, or used to produce distress calls by rubbing ridges on the dorsal process against a channel in the wall of the pectoral girdle. Growth of the pectoral spine and girdle …
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Predation Vulnerability and Trophic Interactions of Pallid Sturgeon Scaphirhynchus albus
… the efficiency of walleye Sander vitreus, flathead catfish Pylodictis olivaris and smallmouth bass Micropterus dolomieu feeding on large (40-50 mm FL) and small (80-100 mm FL) juvenile pallid sturgeon. Experiments for each predator were conducted at high and low densities of pallid sturgeon …
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Feeding Ecology of Invasive Catfishes in Chesapeake Bay Subestuaries
Blue Catfish Ictalurus furcatus are native to tributaries of the Mississippi River but are now invasive in several Atlantic slope drainages. This includes subestuaries of the Chesapeake Bay, where their feeding ecology and potential impact on native species was largely unknown. We collected stomach …