-5.344+3.185 log TL (R =0.984). The average total length of the adult female is significantly greater than that of the adult male(P<0.001). The total length for 50% of the adult females to reach sexual maturity is 135 mm, and for the males, 71 mm. The condition of reproductive organs, GSI (gonadosomatic index) and distribution of egg diameters in different month's samples all indicate that the breeding season for V. barbatulus is from January to July with the peak occurs between February and April. We conclude that the reproductive strategies for V. barbatulus in this region are: (1) males reach sexual maturity and begin to participate reproduction as early as possible, while females delay maturity and gain larger body dimension, (2) the females maintain multiple spawning efforts during the prolonged breeding season to reduce the mortality of larva and yearling due to sudden environmental changes and to maximize the survivor of their offspring.
