Effect of differential gastric evacuation and multispecies prey items on estimates of daily energy intake in juvenile Chinook salmon
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Abstract
The caloric density of stomach contents in juvenile chinook salmon,Oncorhynchus tshawytscha, was not affected by gastric evacuation, suggesting a constant caloric density of stomach contents during evacuation. Differences in the caloric density of prey consumed did affect caloric density of stomach contents over a 24-h period. Consumption of the amphipodCorophium sp. was associated with reduced caloric densities of stomach contents. During periods whenCorophium contributed more than 4% of the stomach contents, average caloric density declined from 5.56 to 5.33 kcal g−1. Despite this difference, estimates of daily energy intake of juvenile chinook salmon were only 3%, greater when developed from the mean caloric density of stomach contents excludingCorophium.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Effect of differential gastric evacuation and multispecies prey items on estimates of daily energy intake in juvenile Chinook salmon |
| Series title | Environmental Biology of Fishes |
| DOI | 10.1007/BF00001883 |
| Volume | 19 |
| Issue | 2 |
| Year Published | 1987 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Contributing office(s) | Western Fisheries Research Center |
| Description | 7 p. |
| First page | 131 |
| Last page | 137 |
| Google Analytic Metrics | Metrics page |