Aquaculture In Crab Farming

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Crab is being associated with mankind from the ancient time. It is believed that a group of stars which forms a figure of crab called ‘cancer’ effects man’s fortune. According to Greek mythology, the crab crushed by Hercules when it pinched his toes in during a contest with Hydra. He became angry and threw the crab on the sky. That makes the star sign of ‘cancer’. Aquaculture of the mud crab has been practiced for the past l00 years in China (Yalin and Qingsheng, 1994) and for the past 30 years throughout Asia. In Japan, sea-ranching of hatchery reared mud crab seed has been employed but seed production has not been proved reliable (Shokita et al., 1991). Almost all crab aquaculture production relies on wild-caught stock, as larval rearing has…show more content…
In spite of that crab farming in West Bengal has always been kept in the dark. In the recent years, there is a rapid growth of crab markets in West Bengal. The coastal and estuarine waters of West Bengal give a large amount of crabs which can be exported. But the crab fishery in West Bengal remains in its traditional form even today. The crab farmers face the problems of the entire world as well as the some specific problems of that area. Crabs are generally cultured in three districts of West Bengal namely North 24 Parganas, South 24 Parganas, Purba Medinipur as these three districts have brackish water resources. Brackish water is essential for culture of mud crab (Scylla serrata). Among the three districts, South 24 Parganas has the highest concentration of crab farmers. Keeping in view the facts, the present study was designed with the following specific objectives, i.e., to study the socio-economic profile of the crab farmers, to study the present status of the crab farmers and to study the constraints at different stake holders’ level associated with the crab…show more content…
Lack of transport system found to be second major constraints to the crab farmers followed by Credit problem and Transport problem Table 2: Distribution of Respondents according to the problems faced in crab farming S. No Category Frequency Percentage Rank 1 Lack of Crab Seeds 60 100 1 2 Marketing Problem 56 93.33 2 3 Transport Problem 45 70 4 4 Credit Problem 52 86.67 3 B. Disease Problems: Table 3: Distribution of Respondents according to the intensity of disease problems faced in crab farming S. No Category Frequency Percentage 1 Ulcer on carapace 15 25 2 Necrosis on appendages 9 15 3 Both Ulcer and necrosis 21 35 4 No Disease outbreaks 15 25 It is evident from the table 3 that As far as the disease outbreak in crab farming was concerned, 35% of respondents reported that crabs suffered from Ulcer on carapace and Necrosis of appendages and they used lime and KMnO4 to get rid of these diseases.
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