[Food habits of the rainbow trout Oncorhynchus mykiss (Salmoniformes: Salmonidae) in an Andean creek of Venezuela].
Monthly stomach context samples of rainbow trout from Mucunután stream (Mérida, Venezuela), were collected from, March 1987 to February 1988 (n = 306). The major dietary components were Ephemeroptera, Trichoptera and Diptera. Baetodes sp. was the most important food item based on numerical composition (43%) and frequency of occurrence (88%). When the gravimetric method was used Leptonema sp. was the major dietary component. The diet was not a function of sex. The consumed fauna was more similar to the drift invertebrate fauna than to that of benthos (p < 0.01). The fluctuations on the stomach content paralleled changes of food availability in the environment.
Bastardo
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H
Campo Experimental Truchícola La Mucuy, FONAIAP-Mérida, Venezuela.
Infante
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O
Segnini
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S
D000818:Animals; D004032:Diet; D005247:Feeding Behavior; D005260:Female; D005618:Fresh Water; D008297:Male; D017686:Oncorhynchus mykiss / Q000502:physiology*; D012737:Sex Factors; D013997:Time Factors; D014687:Venezuela