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Bata Fish

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Introduction
The bata, Labeo bata (Hamilton, 1822) is one of the endangered minor carp species of Bangladesh. L. bata is distributed throughout Indian subcontinent including Bangladesh, India, Nepal, Myanmar and also Pakistan (Talwar and Jhingran, 1991; Devi and Ali, 2013). This fish is commercially important and target species for commercial small and large scale fishers in Bangladesh. It is also used by both culture and capture fisheries nowadays. L. bata is highly popular in the market because of its high nutritional value, good taste and qualities (Bhuiyan, 1964). This fish contains about 15.42% of protein and 3.73% of lipid (Ahmed et al., 2012).
L. bata is a freshwater fish in Bangladesh. This species is a non-migratory fish and remains …show more content…
After drying, quicklime (CaCO3) was spread over the pond bottom at a rate of 1 kg decimal-1. After three days of liming, all the ponds were filled with ground water to a depth of about 1.0 meter. Five days subsequent to liming, the ponds were fertilized by using cow dung at the rate of 5 kg decimal-1. Then after 5 days of fertilization, dipterex was sprayed on pond water at the rate of 0.5 ppm to eradicate harmful insects. And finally all the ponds were surrounded by fine meshed nylon nets fixed with locally available bamboo to protect the fish from predators (Such as frogs, snakes etc.) from entering the ponds.
Stocking
The experimental ponds were stocked with bata fry which were collected from Fish seed multiplication farm, Parbatipur, Dinajpur, Bangladesh. Before releasing the fries, to the experimental ponds the initial length and weight were recorded with the help of and a scale and a sensitive portable electric balance. The average initial weight and sizes of fry was 1.02 ± 0.064 g and 3.42 ± 0.068 cm respectively. …show more content…
Fishes were fed twice a day at 9 am and 4 pm with two equal split of the ration. Regular monitoring of the stocked fish was carried out during feed supply. In addition random sampling was carried out from each pond on fortnightly basis to check the health condition of fishes. Proximate composition of the feeds was analyzed according to AOAC (1984) method. Proximate composition (% dry matter) of the supplementary feeds (crude protein, crude lipid, Crude fiber and ash) of experimental feeds was 31.80%, 6.74%, 8.25%, 15.84% and 30.37%, respectively.
Water Quality Parameters Physico-chemical parameters of pond water were monitored weekly between 9.00 and 10.00 h. Water temperature (°C) was measured using portable digital thermometer. Determination of water pH and dissolved oxygen was carried out portable pH meter and DO meter respectively. Transparency (cm) was measured using Secchi disk.
Estimation of growth, survival, production and feed

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