翎电鳗卵巢发育组织学研究  

Histological Observation of Ovarian Development of Apteronotid Eel Apteronotus albifrons

作　　者：哈承旭 杨翠华 王玮 王云忠 刘萍[2] HA Chengxu;YANG Cuihua;WANG Wei;WANG Yunzhong;LIU Ping(Qingdao Marine Science and Technology Museum,Qingdao 266003, China;Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China)

机构地区：[1]青岛海洋科技馆,山东青岛266003 [2]中国水产科学研究院黄海水产研究所,山东青岛266071

出　　处：《水产科学》2021年第3期403-408,共6页Fisheries Science

基　　金：国家科技基础条件平台中心项目(2019DKA30470).

摘　　要：翎电鳗是深受广大水族爱好者喜爱的观赏鱼类,研究其卵巢发育规律,可以为该鱼的人工繁育提供理论基础。翎电鳗成熟卵巢为囊状,泄殖孔位于体前端下颌后方。常规石蜡切片方法对其卵巢进行观察发现,翎电鳗的卵巢发育分为6个时期,卵子发育分为5个时相。4月龄雌鱼卵巢中有较多第Ⅱ时相卵母细胞,少量卵原细胞,发育至第Ⅱ期;8月龄雌鱼卵巢中含有卵原细胞、第Ⅱ时相和第Ⅲ时相卵母细胞,发育至第Ⅲ期;10月龄雌鱼卵巢中同时存在卵原细胞、第Ⅱ时相、第Ⅲ时相和第Ⅳ时相卵母细胞,发育至第Ⅳ期,达性成熟;11月龄雌鱼卵巢中第Ⅴ时相卵母细胞占主要成分,为Ⅴ期。Ⅴ期卵巢中成熟卵径的大小分布在1.08~1.15 mm和1.78~1.84 mm。翎电鳗雌性亲鱼在理想环境下存在短时间内一批卵排出后新一批次的卵成熟并被释放的可能,产卵类型属分批同步型。The mature ovary of apteronotid eel Apteronotus albifrons is saccate with an unusual cloacal orifice position located in the front of the body and behind the mandible.The histological research using conventional paraffin section method found that ovarian development of apteronotid eel was divided into six stages and oogenesis into five phases.The results showed that four-month old apteronotid eel had ovaries in stageⅡ,and oocytes in phaseⅡ.Six-month old apteronotid eel had ovaries in stageⅢwhere there were oocytes in phaseⅡand phaseⅢ,the latter being the most prevalent.Ten-month old apteronotid eel had ovaries in stageⅣwhere oocytes were in phaseⅡ,phaseⅢand phaseⅣ,reaching sexual maturity.PhaseⅤoocytes were dominant in ovaries of eleven-month old apteronotid eel in stageⅤ.Oocyte size distribution was bimodal for stageⅤovary.The oocytes were primarily ranged from 1.08—1.15 mm to 1.78—1.84 mm in diameter.In an ideal environment,the oocytes matured and were released in a short period of time after a batch of eggs were released.This is in accordance with the characteristics of batch spawners.

关 键 词：翎电鳗 卵巢 产卵类型 

分 类 号：S965.8[农业科学—水产养殖]