STUDIES ON TECHNIQUES OF ARTIFICIAL OVERWINTERING OF PARENT PRAWN——PRODUCTIVE EXPERIMENT ON A LARGE SCALE
Liu Guiyou (Tanggu Fisheries Office,Tianjin) Shang Muqiang Meng Jingyu (Tanggu Aquatic Seeding Farm,Tianjin)
Under the bad condition of the high latitudes along the coast of Tian- jin and the fast drop of temperature in autumn,a productive experiment Dn large- scale artificial overwintering of parent prawn has been made at Tanggu Seeding Farm during Oct. 12, 1990 to Mar. 15, 1991. Its main contents include: studies on natural coitiori of parent prawn indoors;studies on regulative techniques of density and water temperature during artificial overwintering on a productive scale, and studies on promotion of sexual maturity at the right time.