文章摘要
游秀容,蔡明夷,姜永华,王志勇.大黄鱼性腺性别分化的组织学观察[J].水产学报,2012,36(7):1057~1064
大黄鱼性腺性别分化的组织学观察
Histological observation on gonadal sex differentiation in large large yellow croaker ( Larimichthys crocea)
投稿时间:2011-12-01  修订日期:2012-03-24
DOI:10.3724/SP.J.1231.2012.27858
中文关键词: 大黄鱼  性腺分化  发育;组织学观察
英文关键词: Larimichthys crocea  gonadal differentiation  development  histological observation
基金项目:公益性行业(农业)科研专项(200903046-05), );福建省自然科学基金(2011J01229), );集美大学创新团队基金(2006A002)
作者单位
游秀容 集美大学水产学院, 农业部东海海水健康养殖重点实验室 
蔡明夷 集美大学水产学院, 农业部东海海水健康养殖重点实验室 
姜永华 集美大学水产学院, 农业部东海海水健康养殖重点实验室 
王志勇 集美大学水产学院, 农业部东海海水健康养殖重点实验室 
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中文摘要:
      利用组织学方法研究了大黄鱼的性腺分化和发育规律。大黄鱼受精卵于2009年9月22日开始孵化, 孵化水温26℃, 育苗水温22.0℃ ~ 25.8 ℃, 养殖水温11.5℃ ~ 25.6 ℃。20日龄稚鱼(体长17.6 mm ~ 19.2 mm)腹腔中一对原始性腺已经形成。55日龄幼鱼(体长27.5 mm ~ 37.0 mm)半数个体性腺中形成成簇发育的卵原细胞群, 标志着卵巢解剖学分化开始。减数分裂和卵巢腔的形成同时开始于60日龄(体长28.0 mm ~ 37.2 mm)。120日龄幼鱼(体长39.2 mm ~ 51.0 mm)性腺中, 初级卵母细胞出现, 标志着卵巢细胞学分化的开始。精巢分化开始于第95日龄(体长38.0 mm ~ 48.0 mm), 其解剖学标志为生精导管的形成及体细胞在性腺中的散布方式。145日龄~195日龄, 由于水温过低, 鱼苗停止生长, 期间性腺发育水平没有明显变化。215日龄幼鱼(体长44.0 mm ~ 59.2 mm)性腺中精母细胞的出现标志着精巢细胞学分化的开始。精小叶于230日龄(体长56.2 mm ~ 72.8 mm)形成。由此可见, 大黄鱼雌性性腺发育早于雄性性腺, 且大黄鱼性腺分化类型属于分化型雌雄异体型。
英文摘要:
      The process of gonadal development and differentiation of large yellow croaker Larimichthys crocea was investigated with histological methods. The sampled fries were hatched on Sept. 22nd , 2009 at 26℃. The temperature for nursery and culture were 22.0 ℃ - 25.8 ℃ and 11.5 ℃ - 25.6 ℃, resepectively. At the age of 20 days post hatch (dph ), when the fries gained 17.6 mm - 19.2 mm in body length (BL), a pair of primordial gonads were present in the abdominal cavity. Ovarian differentiation occurred at 55 dph (BL 27.5 mm - 37.0 mm), and was characterized by the presence of clusters of oogonia. The formation of ovarian cavity and meiosis of germ cells began simultaneously at the age of 60dph (BL 28.0 mm - 37.2 mm). The presence of primary oocytes occurred at the age of 120 dph (BL 39.2 mm - 51.0 mm). The differentiation of testis began at the age of 95 dph (BL 38.0 mm - 48.0 mm) and was characterized by the presence of efferent duct and the scattering of somatic cells throughout the gonad. Cyst of spermatocytes could be seen at 215 dph (BL 44.0 mm - 59.2 mm) and testis lobules started to form at 230 dph (BL 56.2 mm -72.8 mm). These results suggested that large yellow croaker is a differentiated gonochorist, and differentiation of the ovary occurs earlier than that of testis.
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