Effect of Feeds and Fertilizers on Growth and Survival Rate of Threatened Labeo bata Fry in Earthen Nursery Ponds

The present study was conducted to reveal the effects of formulated feeds and fertilizers on growth and production of the threatened fish Labeo bata (Hamilton, 1822) in nursery ponds of the Department of Fisheries, University of Rajshahi, Bangladesh for a period of 90 days from 11 July to 10 October, 2011. The th th the treatments. However, all the water quality parameters were within suitable range for optimal fish growth. The mean values of weight gain was found highest (6.46±0.16 g) in T and lowest (5.40±0.14 g) in T , length gain was 13 found highest (7.00±0.13 cm) in T and lowest (5.50±0.12 cm) in T , specific growth rate (%) was found highest 13 (6.86±0.03) in T and lowest (5.98±0.2) in T , survival rate (%) was found highest (75.17±0.48) in T and lowest 12 1 (65.77±0.28) in T. The overall production and cost benefit ratio of L. bata fry rearing was significantly higher 3 in T. The present study reveals that rearing of L. bata fry in nursery ponds is more profitable (Both in terms 1 of growth and economics) while using both formulated feeds and fertilizers during culture period.