鲤鱼早繁技术研究

Study on early breeding technique of carp

建鲤经强化培育 ,于早春二月发育成熟 ,在人为控制下繁殖 ,产苗时间比常规提早 4 0～ 60 d,延长了鲤鱼成鱼养殖周期 ,提高了成鱼产量。1 994～ 1 995年 ,早繁鲤苗 379万尾 ,其亲鱼产卵率 93.8%～ 1 0 0 % ,有效繁殖力 86粒 /g体重 ,孵化率 86.1 % ,鱼苗培育成活率 81 .1 %。经济核算成本利润率 2 55.3% ,单位投资渔业产值 1 .9元 /年·元 ;投资回收期 0 .4 3年 ,鲤成鱼养殖增产 2 0 %

Carps were reared with intensified measure to mature in early spring (February), stimulated to spawn under artificial control The time was 40～60 days earlier than normal, which prolonged the growing period of carp and increased output In 1994 and 1995, a total number of 3 79 million carp fries was obtained by using the method above The spawning rate of parent fish, available fertility, incubating rate, surviving rate of fry, profit rate of economic accounting cost, fishery output value per investment and investment payout period were 93 8%～100%, 86 eggs/g BW, 86 1%,81 1% 255 3%, 1 9 yuan/year yuan, 0 43 year respectively The adult fish output was increased by 20%