Availability of Clupeid Prey to Primary Piscivores in Smith Mountain Lake, Virginia

Autor:	Michael Cyterski, John J. Ney
Rok vydání:	2005
Předmět:	geography Dorosoma biology geography.lake Ecology Alosa pseudoharengus Micropterus Aquatic Science biology.organism_classification Predation Gizzard shad Fishery Bass (sound) Predator Ecology Evolution Behavior and Systematics Cumulative effect
Zdroj:	Transactions of the American Fisheries Society. 134:1410-1421
ISSN:	1548-8659 0002-8487
DOI:	10.1577/t04-110.1
Popis:	Prey supply to predators is limited by the morphology, behavior, and spatial distributions of both predator and prey. To be eaten, prey must co-occur spatially and temporally with the predator (distribution), the predator must recognize the prey as potential food and successfully capture it (behavior), and the predator must have a mouth large enough to ingest its target (morphology). We quantified the cumulative effect of these three factors on clupeid prey availability to both largemouth bass Micropterus salmoides and striped bass Morone saxatilis in Smith Mountain Lake, Virginia. As expected, morphological constraints were more severe for small predators. Alewives Alosa pseudoharengus were morphologically more available than gizzard shad Dorosoma cepedianum. Incongruent spatial distributions, the result of lake stratification, prevented striped bass from feeding on gizzard shad during summer and limited largemouth bass consumption of alewives. For unknown behavioral reasons, largemouth bass and...
Databáze:	OpenAIRE
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