Crab/ Mud crab (Scylla serrata) culture technique Or Mud Crab Scylla serrata fattening in Pond : Part 02

Crab/ Mud crab (Scylla serrata) culture technique Or Mud Crab Scylla serrata fattening in Pond : Part 02

Suitable Physico-chemical parameters in earthen pond:

Salinity, water temperature, water pH, soil pH and dissolved oxygen (DO) were recorded as 2-8‰ and 3-8‰, 28-30°C and 22-25°C, 5.5-7 and 6-7, 6 and 6.2 and 8.85ml/L and 8.50ml/L in the first and second experiment respectively.

Growth and mortality rate:

Growth rate (0.92 to 1.64 g/individual./day for male and 0.61 to 1.06 g/individual./day for female) and mortality rate (3-6% for both male and female crab) were observed in pond .Average growth rate was found 0.66 g/individual./day for male and 0.36 g/individual./day for female , and mortality ranged from 7-12% in monosex pond culture. while in mixed culture, average growth rate was found 0.60 g/individual./day for male and 0.33 g/individual./day for female, and mortality ranged from 14-15%

In the first experiment, growth rate was found higher due to the stocking of small crabs in cage and pond. In winter season, lower growth rate of male crab was observed probably due to low temperature

Conclusion :

Crab culture in Bangladesh has great prospect in respect of culture and economic point of view. It is considered as the second important cultivable fishery items throughout the coastal areas of the country. Crab juvenile availability, mass cultivable area, suitable environment, local consumption, foreign market demand, pollution free and other facilities are present in Bangladesh. Therefore, cage culture of mud crab is an important scientific extension issue to develop its fishery in Bangladesh and other countries. In fact, easy approaches of crab culture make it more viable to the poor coastal people. Poor coastal community will be benefited and thus their socio-economic status will be upgraded.

PART 1