Trophic Resource Overlap between Age-0 Striped Bass and Largemouth Bass in Smith Mountain Lake, Virginia

Autor:	Trent M. Sutton, John J. Ney
Rok vydání:	2002
Předmět:	food.ingredient Ecology Growing season Micropterus Management Monitoring Policy and Law Aquatic Science Biology biology.organism_classification Zooplankton Predation Fishery Bass (fish) food Stocking Predator Ecology Evolution Behavior and Systematics Trophic level
Zdroj:	North American Journal of Fisheries Management. 22:1250-1259
ISSN:	1548-8675 0275-5947
DOI:	10.1577/1548-8675(2002)022<1250:trobas>2.0.co;2
Popis:	Small body size in fall and low winter survival of fingerling striped bass Morone saxatilis stocked into Smith Mountain Lake, Virginia, have been attributed to slow growth during summer months. Although small size at stocking appears to be the primary factor restricting fish prey consumption and rapid growth, trophic competition may also be a contributing factor. We examined the food habits of sympatric populations of age-0 striped bass and largemouth bass Micropterus salmoides over the 1994 and 1995 growing seasons to assess temporal and length-related patterns and similarities in trophic resource use. With increasing predator length, food habits for both species shifted from zooplankton to insect and then to fish as the principal prey items over both growing seasons. Except for fish smaller than 50 mm during June and July 1994, diet overlap was insufficient (Schoener's index value
Databáze:	OpenAIRE
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