The Shrimp Fry By-catch in West Bengal-BOBP/WP/88
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Culture of tiger shrimp has gained momentum over the last decade in many parts of the world due to its high export value. It has become a major foreign exchange earner in India, where West Bengal is the largest culture centre. In West Bengal, the basic input of tiger shrimp fry is met from the wild, with a large number of the rural poor engaged in shrimp fry-catching and trading in the 24 Parganas (N and S) and Medinipur Districts. However, the destruction of by-catch captured during fry-collect ion has been causing concern. This working paper, based on work done from October 1990 to September 1991 gives an overall picture of the shrimp fry by-catch by assessing quantitatively the seasonal and spatial variations in the species composition. By-catch is 64-99.4 percent of the total fry caught. The fry by-catch destroyed over a period of one year is estimated at 62 million - 2592 million. The study was carried out by the Central Institute of Brackishwater Aquaculture (CIBA) at its Rese arch Centre in Kakdwip, West Bengal. It was sponsored by the Bay of Bengal Programme (BOBP) of the Food and Agriculture Organization (FAO). Two field biologists were engaged by BOBP for sampling and data collection at three centres and the project was implemented under the supervision of CIBA scientists. The authors acknowledge the contributions of the following : Dr K. Alagarswami, Director, CIBA. Madras, for his guidance and keen interest in the investigations; A.V.P. Rao, Principal Scient ist, for monitoring the project and critically going through the manuscript; the field biologists, Rabi Sil and R.S. Halder, for collection of field data; and R.K. Chakraborti, Scientist (SG) for valuable suggestions.