短须裂腹鱼规模化人工繁育技术研究

2012—2013年,为提高短须裂腹鱼人工繁育能力,以刚涌出的清澈无致病菌和虫的地下泉水为水源,采用水流培育亲鱼、流水孵化受精卵、活体饵料培育鱼苗等关键技术,进行短须裂腹鱼规模化人工繁育技术研究。结果表明:2年共采捕野生短须裂腹鱼亲鱼403尾,在水流速度0.1~0.3 m/s、水温12~16℃、pH值6.5~7.0、溶氧6 mg/L以上的流水池中培育,平均驯养成活率49.4%,获成熟亲鱼234尾次;共催产亲鱼224尾次,产卵雌鱼133尾次,总产卵量127.3万粒,平均每尾雌鱼产卵0.957万粒;获受精卵93.8万粒,平均受精率为73.7%;受精卵在水温12.5~14.0℃的流水孵化槽中孵化199 h开始出膜,共孵出幼体85.5万粒,平均孵化率91.2%;共获2 cm仔鱼55.1万尾,平均出苗率58.7%;共获3.5 cm鱼苗45.2万尾,鱼苗培育成活率为82.0%。

Study on Large Scale Artificial Propagation of Schizothorax Wangchiachii

From 2012 to 2013,in order to improve Schizothorax wangchiachii artificial breeding ability,using no pathogens and insects of underground spring water of new outflow as source water,using flowing water culturing parent fish,using flowing water incubation fertilized egg,live bait fish cultivation,the paper studied the large scale artificial propagation of Schizothorax wangchiachii.The results showed that,the number of harvesting wild Schizothorax wangchiachii was 403,the parent fishes were cultured in the pool of flowing water whose flow rate was 0.1～0.3 m/s,the temperature was 12～16℃,the pH was 6.5～7.0,and the dissolved oxygen content was more than 6 mg/L.The domestication survival rate was 49.4%,the number of mature parent fish was 234.The number of Spning parent fish was 224.The egg laying female fishes were 133,total fish eggs were 1 273 000 particle,Laying eggs 9 570 particle per females fish.Fertilized eggs were 938 000 particle,the average fertilization rate was 73.7%.The fertilized eggs were incubated in the flowing water incubation tank.Water temperature was 12.5～14.0℃,the eggs began hatching out juvenile fish after 199 h,the number of juvenile fish was 855 000,the average hatching rate was 91.2%. 551 000 juvenile fish were got whose length were 2 cm,the average seedling emergence rate was 58.7%;452 000 young fish were got whose length were 3.5 cm;larval rearing survival rate was 82.0%.