Trout Piscivory in the Colorado River, Grand Canyon: Effects of Turbidity, Temperature, and Fish Prey Availability

Autor:	Colden V. Baxter, Lewis G. Coggins, Glenn E. Bennett, Josh Korman, Michael D. Yard
Rok vydání:	2011
Předmět:	Canyon geography geography.geographical_feature_category biology Ecology Aquatic Science biology.organism_classification Predation Fishery Brown trout Trout Rainbow trout Salmo Predator Ecology Evolution Behavior and Systematics Gila cypha
Zdroj:	Transactions of the American Fisheries Society. 140:471-486
ISSN:	1548-8659 0002-8487
Popis:	Introductions of nonnative salmonids, such as rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta, have affected native fishes worldwide in unforeseen and undesirable ways. Predation and other interactions with nonnative rainbow trout and brown trout have been hypothesized as contributing to the decline of native fishes (including the endangered humpback chub Gila cypha) in the Colorado River, Grand Canyon. A multiyear study was conducted to remove nonnative fish from a 15-km segment of the Colorado River near the Little Colorado River confluence. We evaluated how sediment, temperature, fish prey availability, and predator abundance influenced the incidence of piscivory (IP) by nonnative salmonids. Study objectives were addressed through spatial (upstream and downstream of the Little Colorado River confluence) and temporal (seasonal and annual) comparisons of prey availability and predator abundance. Data were then evaluated by modeling the quantity of fish prey ingested by trout durin...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b028da971ebc8043f3b6c4e82d7fba2a https://doi.org/10.1080/00028487.2011.572011 Zobrazit plný text záznamu Plný text