刘筠, 刘国安, 陈淑群, 刘楚吾. 尼罗罗非鱼性腺发育的研究[J]. 水生生物学报, 1983, 7(1): 17-32.
引用本文: 刘筠, 刘国安, 陈淑群, 刘楚吾. 尼罗罗非鱼性腺发育的研究[J]. 水生生物学报, 1983, 7(1): 17-32.
Liu Yun, Liu Guoan, Chen Shuqun, Liu Chuwu. STUDIES ON THE GONADAL DEVELOPMENT OF TILAPIA NILOTICA[J]. ACTA HYDROBIOLOGICA SINICA, 1983, 7(1): 17-32.
Citation: Liu Yun, Liu Guoan, Chen Shuqun, Liu Chuwu. STUDIES ON THE GONADAL DEVELOPMENT OF TILAPIA NILOTICA[J]. ACTA HYDROBIOLOGICA SINICA, 1983, 7(1): 17-32.

尼罗罗非鱼性腺发育的研究

STUDIES ON THE GONADAL DEVELOPMENT OF TILAPIA NILOTICA

  • 摘要: 湖南地区生长于池塘环境的尼罗罗非鱼(Tilapia nilotica),性成熟日龄是110—130天,雄性比雌性普遍早熟20天。精细胞的发生能够完成由精原细胞到精子的全部发育过程,同样,卵细胞的发生也能完成由卵原细胞到卵子的全部发育过程。初级卵母细胞处于Ⅲ时相阶段时,可由包被卵周的滤泡细胞分泌产生放射膜,但放射膜不在动物性极形成受精孔,也无精孔细胞的分化,证实尼罗罗非鱼是属于非受精孔受精类型。初级卵母细胞由Ⅲ时相发育到Ⅳ时相是非同步性的,产后卵巢的组织学结构为第Ⅳ期,卵巢系数在繁殖季节可出现三次高峰,证实尼罗罗非鱼是属于多次产卵类型。通过对精巢组织学的研究,发现尼罗罗非鱼的第Ⅰ期精巢是自然两性嵌合体。

     

    Abstract: This paper deals with the gonadal development of Tilapia nilotica. In Hunan, the age of sex maturity of Tilapia nilotica which grows in the pond is 110—130 days; the male spawners ripen 20 days earlier than the female ones generally. The entire course of spermatogenesis as well as oogenesis, from spermatogonium to spermatozoon and oogonium to egg, can be completed endogenously in the pond environment. The oocytes develop from phase Ⅲ to phase Ⅳ non-synchronously. The histological structure of the ovaries return to stage Ⅳ after natural spawning or after natural degeneration, which testifies that female Tilapia nilotica spawns many times in a year.According to our research, there is nomicropyle and micropylar cell in the structure of a primary oocyte (phase Ⅳ), which is different from the primary oocyte of the grass carp and snail carp. The testes of male Tilapia nilotica are hermaphroditic mosaics at early stages of development.

     

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