Abstract
The present study was conducted to identify low cost feed for female mud crab (Scylla olivacea) fattening practice in plastic box and the effect of different feeds on growth and survival rate of mud crab. A number of 30 adult non-gravid female crabs were reared into rectangular shaped plastic boxes, each box containing one crab. Three types of feed such as Chicken intestine, Tilapia and Apple Snail meat were supplied as feed at 10% of body weight of the crabs once daily considered as Treatment-1, Treatment-2 and Treatment-3 respectively with 10 replications each to compare the fattening system.. The crabs in plastic boxes were floating into water to fatten for 10 days. Survival rate of crab was found 100%, 90% and 100% respectively in chicken intestine, tilapia and apple snail meat. In the experiment food conversion ratio (FCR) and specific growth rate in weight (SGRw) were varied significantly among different foods (P >0.05). Comparative benefit-cost analysis showed that use of chicken intestine as feed in crab fattening attained higher net profit than crab fattening used tilapia and apple snail s feed from 7-12 days fattening period The present study revealed that utilization of chicken intestine as feed for mud crab fattening might be better than any other feeds and cost effective in Bangladesh.
 Asian J. Med. Biol. Res. June 2019, 5(4): 303-315
Highlights
Bangladesh has a vast area of coastline including 618,780 ha of mangrove tidal flat and 80,000 ha of prime area which is suitable for brackish water aquaculture (Anon, 2003) especially for crab culture
The water quality management is supported by the study of different researcher (Ali et al, 2016; Shabuj et al, 2016;Shajib et al, 2017; Zafar et al, 2017; Rahman et al, 2018; Akter et al, 2018; Faruk et al, 2018; Biswas et al, 2018; Billah et al, 2019).In the present experiment, 100% survival was obtained for crabs fed with Chicken intestine and Apple snail meat
The present study showed that chicken intestine could be alternative inexpensive feed for mud crab with higher growth and economic performance and it was comparable to Chilok and Hanafi
Summary
Bangladesh has a vast area of coastline including 618,780 ha of mangrove tidal flat and 80,000 ha of prime area which is suitable for brackish water aquaculture (Anon, 2003) especially for crab culture. The mud crab fishery is absolutely based on wild catch mainly from the swamps of the mangrove (Hoque et al, 2015; Kaleem et al, 2016) and vast areas of the traditional shrimp ghers along the coastal region of Bangladesh. People of the coastal region follow traditional fattening process to grow crab. Fattening usually requires 7-15 days to complete Within this time, premature crabs are well fed to develop their gonad fully. There is a great potential of crab culture throughout the coastal area in Bangladesh. The mud crab was first exported in 1977-78 fiscal year and become a stable business in 1982. During 2006-07 fiscal year mud crabs has taken the 3rd rank among the fish and fisheries export earnings from Bangladesh. Mud crab is popular as a palatable and valued food item globally and
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