Author(s): Manoranjan Paramanik, Shahajahan Ferosekhan and Sangram K. Sahoo

Abstract: An experiment was conducted to rear the larvae in total dark environment with a probability of enhanced growth and survival, as the Clarias batrachus larvae is photonegative in nature. Hence the larvae were reared at four density treatments (D1000, D2000, D3000 and D4000) with three replications of each treatment for 14 days under dark condition to find out the optimum density level during its rearing. Growth parameters such as final total length and wet weight of the C. batrachus larvae were recorded significantly (P < 0.05) higher in D1000 followed by D2000 treatment group and it was observed that the growth rate decreased with the increasing level of stocking density. The daily weigh gain, weight gain, percent weight gain and specific growth rate were found significantly (P < 0.05) higher in D1000 treatment group. The survival rate was recorded more than 90% in D1000 and D2000 treatment groups at the end of experiment and among all the treatment groups D1000 showed significantly (P < 0.05) higher survival rate. The lowest survival rate was observed in higher stocking density treatment group (D4000). If growth and survival of Clarias batrachus larvae is considered, up to 2000 larvae m-2 density is acceptable while rearing in dark condition.

Pages: 142-144  |  1236 Views  83 Downloads

Download Full Article: Click Here