After the artificial reproduction of catfish Heterobranchus bidorsalis, larvae of two days old and 2.23 ± 0.27 mgof mean weight were used to perform two experiments in order to assess their resistance to fasting and the effectof delaying first feeding on their growth and survival. In the first experiment, it was noted that the first larvaedied at D5 (3.33%), the largest daily mortality was recorded at D10 with 53.33% and all larvae died at D11(6.67%). At the end of the second experiment, results showed that growth was better in larvae fed at D6 (594.25± 107.05 mg mean weight) than those fed at D4 (323.59 ± 110.78 mg) and D2 (275.32 ± 146.58 mg). In contrast,the survival rate was better for larvae fed at D2 and D4 than those fed at D6 with respectively 37.00 ± 16.46%,18.66 ± 1.47 % and 5.67 ± 6.42%
ALLA et al. (Thu,) studied this question.
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