Seasonal change in the gastric evacuation rate of rainbow trout feeding on natural prey
Authors:
- 7 December 2007
- journal article
- Published by Wiley in Journal of Fish Biology
- Vol. 71 (6) , 1873-1878
Abstract
Seasonal changes in the gastric evacuation rate (R) and gut contents of a wild population of rainbow trout Oncorhynchus mykiss feeding on natural prey at four water temperatures (2, 7, 9 and 12° C) were measured. The R and mass of the gut contents increased with water temperature, and prey items changed seasonally. These results suggest that the R of fish feeding on natural food depends primarily on water temperature, with their consumed prey being a secondary factor.Keywords
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