Author(s): Kalim Ullah, Arslan Emmanuel and Muhammd Zubair Anjum

Abstract: Effects of stocking densities on the growth and survival of mahseer (Tor macrolepis) fingerlings were examined in a six glass aquaria. The experiment was conducted for two months in aquarium having a size of 1x1.5x2 feet (height x width and length) each. Fingerlings were stocked at 10, 20 and 30 with duplicated, designated as treatment-1 (T1), treatment-2 (T2) and treatment-3 (T3) respectively. At stocking, all fingerlings were of the same group with a mean Total body length of 7.8±2.15, 9.96±2.31, 5.68±1.25cm and weight of 5.38±3.57, 9.39±4.76, 2.96±0.72gm respectively. Fingerlings in all the treatments were fed with Orayza commercial fish feed at 40% crude protein value. Water levels were maintained in the entire aquarium. Highest weight gain was observed in T1 and lowest in T3. Final length, final weight and survival of fingerlings also followed the same trends as weight gain. Overall, highest growth and survival of fingerlings were obtained at a density of 10 fingerlings. Hence, of the three stocking densities, 10 appear to be the most suitable stocking density for rearing of mahseer fingerlings in aquarium under laboratory study.

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