Abstract
The food passage time of bighead carp weighing 13 to 2850 g was 7.1 to 12.8 h and the daily food ration was 5.7 to 2% of body weight at water temperatures ranging from 21 to 28.5°C. Food passage time tended to be shorter for larger fish because the speed of passage was substantially higher for the larger fish: 323 mm h−1 for the larger fish and 67 mm h−1 for smaller fish. Gut length increased with increased body length. Relative gut length showed great variability. It increased with increasing fish body length up to about 250 mm and remained similar for larger fish.
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