Growth, mortality and yield per recruit of bearded croaker Johnius dussumieri (Val.) from Mumbai waters

Abstract

Growth, mortality and yield per recruit oi Johnius dussumieri (Val.) is reported in the present communication. The VBGF parameters in length were estimated as L__ = 269 mm, K = 0.9633 year and t^ = -0.013 years. The asymptotic weight was calculated as 257 g. The mortality and yield parameters were Z = 2.38, M = 2.02, F = 0.36, E = 0.15 and U = 0.13. At the present level of F = 0.36, the yield per recruit stood at 5.46 g. It is seen that increase in the age at first capture (t^) by increasing of cod end mesh size would result in decline in the catch even at the present level of F.