黑龙江水产研究所在宏胜水库、涝州鱼种场等单位,经四年努力,研制出一种“长效催熟药”。该药对鲢鱼有明显的催熟作用,只要对亲鱼进行一次注射即可,药物作用在肌肉内可延续40～60天,它能促进脑下垂体分泌促性腺激素,激发卵巢加速发育。黑龙江省鲢鱼的一般产卵期在六月十五日至六月二十五日,而用该药注射的亲鱼,要比对照组亲鱼提前15～20天成熟如涝州鱼种场在一九八三年四月十七日注射药物,至 Heilongjiang Institute of Fisheries in Aisheng reservoir, waterlogged fish fields and other units, after four years of hard work, developed a “long-term ripening medicine.” The drug silver carp obvious ripening effect, as long as the broodstock can be an injection, the role of drugs in the muscle can extend 40 to 60 days, it can promote the secretion of gonadotropins of the pituitary gland, stimulate the accelerated development of the ovary. The common spawning period of silver carp in Heilongjiang Province is between June 15 and June 25, while that of the brood fish injected with this medicine is 15 to 20 days earlier than that of the control group April 17, 1983 Injection of drugs to