昆明裂腹鱼人工繁殖技术研究

Study on artificial propagation technique of Schizothorax grahami

于2003年8月起进行野生昆明裂腹鱼(Schizothorax grahami)亲鱼培育研究,并2009年5月3日—9日进行了人工繁殖技术和鱼苗培育实验。结果显示:野生昆明裂腹鱼在人工驯化养殖条件下,能在池塘内正常生长发育。亲鱼初次性成熟年龄为4龄,雌鱼以5～6龄最佳。采用二次胸鳍基部注射,催产孵化水温为14～17℃,效应时间平均为46h,平均孵化时间为176 h,鱼苗经60 d培育(平均水温14～18℃)体长可达5.05 cm。

Breeding of the wild bloodstock Schizothorax grahami were studied from August 2003 and the artificial propagation and the fry rearing experiments were conducted in May 3 to 9,2009.The results shows that：Wild S.grahami could grow and develop by artificial domesticated culture in pond.The S.grahami bloodstock reached the first sexual maturity at the age of 4 years,and the optimum time of female′s maturity was 5~6 years.The females were injected under the pectoral fin twice with mixed doses LRH-A2 15~20 μg/kg＋DOM 5~10 mg/kg＋HCG 1500~2000 IU/kg,and the half doses for the males.The average reactive time of reproduction was 46 h,the average hatching time was 176 h at water temperature of 14~17 ℃.The fry of S.grahami reached 5.05 cm after 60 days rearing.