ON THE AGE AND GROWTH OF Pseudopleuronectes yokohamae (GUNTHER) IN THE BOHAI SEA

The present paper deals with the age and growth of P. yokohamae, whose specimens were collected monthly from April 1982 to May 1983 by trawl in the Bohai Sea. In the study the age and growth of P. yokohamae is determined by annual ring on otolith. On the basis of calculation of monthly changes in appearing frequency for opaque zones on the otolith edgs it is determined that the annual ring of P. yokohamae is formed in January-March every year.
The relation of the standard length to the body weight is W=3.2×10^-5L^2.3018. The relationship between the otolith radius and the standard length is R=-5.43×10^-3+1.71×10^-2L-1.20×10^-5L². The growth for this species is expressed by von-Bertalanffy equation, L_t=L_∞[1-e^-K(t-t₀)], where L_∞=418mm, t₀=-0.7475 and K=0.252.
The P. yokohamae grows faster at the age of 1-2, but slower after two years old. The coordinate of weight-growth inflexion point is at t=3.84 and W=386 g.