Author(s): Azhar Ali, M Rafiqur Rahman, M Kamruzzaman Hossain, Naznin Sultana, Sirajum Monira Shanta, M Motasim Bella, M Forhad Ali, M Arif Hossain, M Shalah Uddin Kabir and Rafiul Islam

Abstract: To optimize the stoking density of stinging catfish shing (Heteropneustes fossilis) in secondary nursing, the experiment was conducted in six earthen ponds of 5.0 decimal each for a period of 8 weeks from 01 July 2017 to 25 August 2017. Three stocking densities maintained with 250000, 312500 and 375000 fingerling ha^-1 designated as treatment T1, T2, and T3 each having two replications. All the fishes were fed MEGA pre starter fish feed (36% protein) for the first 4 weeks and starter feeds (32% protein) for rest of 4 weeks. Feeds were applied twice daily at the rate of 10% for the first two weeks and were decreased by 2% every two weeks thereafter. The water quality parameters were appropriate level for fish culture. The growth performances and survival of H. fossilis fingerlings were significantly (p < 0.05) higher in T1 than those obtained from T2 and T3, respectively. The lowest feed conversion ratio (FCR) was in T1 then followed by T2 and in T3. The gross and net production were significantly (P < 0.05) higher in T2 than those in T1 and T3. However, the highest net benefit was in T2 where the stocking density was 312500 fingerlings ha^-1. Therefore 312500 fingerling ha^-1 (T2) is the most appropriate stocking density for secondary nursing of H. fossilis for better creation and additionally higher net advantages.

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