Bombay duck fishery showed declining trend in the earlier half of the seventies, picked up considerably in the latter half and reached the maximum in 1978 and 1979. However, it is seen that in 1979 the average sizes of the fishes landed at the centres of observation in Maharashtra and Gujarat, the two important states contributing to the major part of the Bombay duck fishery of the country, differed considerably. This would perhaps indicate that the fishery of these two states is supported by two independent stocks. Detailed studies for delimitation of stocks, both statistical and serological are necessary to establish the identity of stock
