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Effect of stocking density on the growth and survival of the critically endangered peninsular carp Hypselobarbus pulchellus (Day, 1870) in fingerling rearing
Author(s) -
Barlaya Gangadhar,
Narasimhan Sridhar,
Basumatary Pinky,
Huchchappa Raghavendra Channaveer,
Kumar Ananda,
Kannur Hemaprasanth
Publication year - 2021
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.15110
Subject(s) - stocking , biology , zoology , fish <actinopterygii> , fishery
The present study was undertaken to generate first time information on the optimal stocking density for fry to fingerling rearing of Hypselobarbus pulchellus . Rearing was carried out for 90 days at stocking densities of 15, 30, 45, 60, 75, 90, 105 and 120 fish/m 2 in 24 m 2 cement tanks. While the length of fish at harvest ranged from 3.42 cm in 120/m 2 to 6.11 cm in 15/m 2 densities, the weight ranged from 0.41 g in 120/m 2 to 2.62 g in 15/m 2 . The final length and weight were inversely related to the stocking density. However, no significant variation ( p > 0.05) in length was observed among the stocking densities of 15, 30, 45 and 60/m 2 . Similarly, the final weight of the fingerlings also did not differ ( p > 0.05) between the stocking densities 15, 30 and 45/m 2 . Further, increase in stocking densities resulted in significant reduction in final length and weight, with the highest stocking density of 120/m 2 recording the lowest values. The condition factor varied between 0.95 and 1.17 with no difference ( p > 0.05) among the stocking densities. The survival of fingerlings at harvest ranged between 81 and 90%, but was not statistically different. The growth in terms of length and weight of H. pulchellus was superior under stocking densities 15, 30 and 45 fish/m 2 compared to higher densities. Hence, the stocking density of 45 fish /m 2 is recommended as the optimum for fry to fingerling rearing of H . pulchellus .