文章摘要
孙帼英,朱云云,周忠良,陈建国.长江口及浙江沿海花鲈的繁殖生物学[J].水产学报,1994,18(1):18~23
长江口及浙江沿海花鲈的繁殖生物学
THE REPRODUCTIVE BIOLOGY OF LATEOLABRAX JAPONICUS IN THE YANGTZERIVER ESTUARY AND ZHEJIANG OFFSHORE WATERS
投稿时间:1993-07-29  修订日期:1993-01-01
DOI:
中文关键词: 花鲈  繁殖生物学  组织学
英文关键词: Lateolabrax japonicus  reproductive biology  histology
基金项目:
作者单位
孙帼英 华东师范大学生物学系,上海 200062 
朱云云 华东师范大学生物学系,上海 200062 
周忠良 华东师范大学生物学系,上海 200062 
陈建国 华东师范大学生物学系,上海 200062 
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中文摘要:
      本文研究了花鲈卵巢的发育、产卵类型、产卵期、繁殖水域及雌雄同体现象等.根据长江口及浙江沿海花鲈卵巢的周年组织学切片,将卵巢划分为Ⅵ期,还有重复发育的Ⅵ-Ⅳ'期(或Ⅳ'期)和Ⅴ'期,属分批非同步型产卵类型.在繁殖季节,短期内可以产两次卵,产卵期为11月至翌年1月,盛产期约为11月中至12月中的一个月内.性成熟年龄,雌鱼为Ⅳ龄,雄鱼为Ⅱ龄,有雌雄同体现象.在邻近沿海和长江口盐度较高水域产卵,盐度为22—26‰.
英文摘要:
      A study has been conducted on the maturation of ovary,spawningtype,ages of maturity,spawning waters and hermaphroditism of Lateolabtax japo-nicus (Cuvier et Valoncinnes?.The course of ovarian maturation is divided into sigstages and a recovered stage VI-IV' or IV'. Stage 1-Juveniles,stage II-includingimmature and recovered ovaries;stage III-ripening ovaries;stage IV-nearly ripe ovaries;stage V-ripe ovaries;stage VI-spent ovaries. After the fish releasesd thefirst batch of eggs,the ovaries regenerate into stage VI-IV' (or IV'),which conti-nue to develop rapidly into stage V'. About half a month later the ovaries developinto stage V'. If enviromental conditions are appropriate,then the another spawnmay take place. This fish are released two batches in a breeding season. The ova-ties develop to stage III in October as the age at first maturity,stage IV in Novem-fiber. The mature fish spawn at the middle of November and continue to Januaryof the next year. The fish spawn in the waters of the Yangtze River estuary andits adjacency with higher salinity nearby marine water. The salinity is about 22-26‰.The female and male reach the first maturity at 4 ages and 2 ages in yearold respectively. The individual absolute fecundity ranges from 3几2928-2211000eggs,averaging 1282327 eggs,and the individual relative fecundity ranges fronn185.27-847.71 eggs,averaging 408.03 eggs.
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