光唇鱼人工繁殖研究

以成熟的500尾野生光唇鱼（雌雄比1：1）为亲鱼,以室外水泥池为产卵池及育苗池,通过设置产卵巢及采用微流水措施诱导亲鱼产卵,获得不同批次的受精卵共72 650粒,平均受精率达85.3%。受精卵在水温24±1℃条件下孵育,43 h孵化出仔鱼,共50 756尾,平均孵化率达69.9%。仔鱼经25 d培育,得全长1.5 cm左右的鱼苗45 275尾,成活率达89.2%。对光唇鱼的胚胎发育进行了观察,经历了胚盘形成、卵裂、囊胚、原肠胚、神经胚、器官分化等发育阶段。试验表明：对亲鱼进行强化培育、设置产卵巢及微流水刺激诱导产卵措施是光唇鱼人工繁殖的技术关键。

A Study on the Artificial Propagation of Acrossocheilus fasciatus

With 500 sexually matured wild Acrossocheilus fasciatus as clean fish（female：male=1：1） and outdoor cement ponds as the spawning and seeding pool,this paper adopted the way of setting the mesh box and using micro-flow water for inducing clean fish to spawn.Batches of fertilized eggs were obtained,which totaled 72 650 and the average fertilization rate was up to 85.3%.It took nearly 43 h for the larvae to hatch from the fertilized eggs at the temperature of 24±1 ℃.The total number of larvae reached 50 756,with the average hatching rate of 69.9%.After 25 days’cultivation,we obtained 45 275 larvae at 1.5 cm long.The survival rate was up to 89.2%.During the observation of embryonic development,we found out that it experienced several phases including blastoderm formation,cleavage,blastula,gastrula,neurula,organ differentiation,etc.The results showed that cultivating in clean fish,setting the mesh box and using micro-flow water to induce clean fish to spawn were the key techniques to the artificial propagation of Acrossocheilus fasciatus.