摘要
本文对长江大鳍亲鱼的池塘培育和人工繁殖技术进行了研究。1992年~1994年期间,采用池塘混养技术,将长江野生大鳍引入池塘进行驯化和培育,连续2年获得成熟亲鱼并进行人工繁殖。在池塘环境中,大鳍雌亲鱼成熟率分别为818%和706%,雄亲鱼分别为100%和935%。采用多种催产药物混合注射的催产方法,可以得到较好的催产率。大鳍人工繁殖适宜的催产剂量是雌鱼每g体重注射LRH-A03~05μg、DOM003~005mg和HCG5~10IU,雄鱼减半或同量。水温24~26℃时,催产效应时间为12~13h。受精卵在水温27~29℃时需53~55h孵化出膜。大鳍人工繁殖受精率不高与其雄鱼精巢特殊的组织结构有关。
The parent fish were collected from the Yangtze River. They were domesticated and cultivated in ponds. The results of domestication show that the sexual gland of parent fish (female and male) can develop normally in ponds. The rate of maturation for female gonad is 81.8% in 1993 and 70.6% in 1994, respectively. But that for male gonad is 100% in 1993 and 93.5% in 1994, respectively.The artificial spawning of mature female and male fish was successful. They were artificially induced spawning by injection with the mixture of LRH-A with DOM and HCG. The dosage of LRH-A、DOM and HCG for female are 0.3~0.5 ug/g, 0.03~0.05 mg/g and 5~10IU/g body weight, respectively. The dosage for male is half of that for female. 12~13h after injected the female fish spawned at water temperature between 24~26℃. The fry were hatched out after 53~55h of incubation at water temperature between 27~29℃. The observation of 5-day-old larvae demonstrates that the digestive organs developed incomplately and the yolk sac is nearly absorbed.
出处
《中国水产科学》
CAS
CSCD
1998年第2期26-30,共5页
Journal of Fishery Sciences of China
关键词
大鳍HU
亲鱼
池塘培育
人工繁殖
Mystus macropterus, Parent fish, Pond domestication, Artificial propagation