| 南方鲶性腺分化的组织学观察 |
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| 引用本文： | 张修月,焦保卫,吴天利,金灿彪,王德寿.南方鲶性腺分化的组织学观察[J].动物学杂志,2005,40(1):41-48. |
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| 作者姓名： | 张修月 焦保卫 吴天利 金灿彪 王德寿 |
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| 作者单位： | 1. 西南师范大学生命科学学院,重庆市水产科学技术重点实验室,重庆,400715
2. 四川省水产学校,重庆,401520 |
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| 基金项目： | 教育部国际科技合作项目;重庆市科委应用基础研究项目 |
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| 摘 要： | 用芳香化酶抑制剂(Fadrozole)、雌激素受体拮抗剂(Tamoxifen)对人工孵化的南方鲶(Silurus meridionalis)幼鱼进行雄性化诱导处理(口服)，获得雄鱼。对孵化后第5—130d的南方鲶幼鱼性腺进行组织学观察，结果表明，在实验条件下，南方鲶性腺分化发生在孵化后7d左右，雌雄性分化过程差异明显。雌鱼卵巢腔在孵化后12d左右形成，生殖细胞在孵化后35d左右快速增殖，成熟分裂最早发生在孵化后55d左右；雄鱼生殖细胞在孵化后130d左右快速增殖，成熟分裂最早发生在孵化后130d左右。雌性性腺分化早于雄性。
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| 关 键 词： | 南方鲶 性腺分化 组织学观察 |
| 文章编号： | 0250-3263(2005)01-41-08 |
Histological Observation on Gonadal Sex Differentiation in the Southern Catfish, Silurus meridionalis |
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| Abstract: | To obtain male fish, fry of southern catfish (Silurus meridionalis) obtained by artificial fertilization and hatching were treated by oral administration of an aromatase inhibitor (Fadrozole) and an estrogen receptor antagonist (Tamoxifen). During 5-130?days after hatching (dah), gonads of fish in treated group and in control group were collected for histological observation. It was indicated that the sexual differentiation of southern catfish took place at around 7?dah. Several obvious differences between female and male were observed during the gonadal sex differentiation. In female, the ovarian cavity was formed at about 12 dah. The germ cells proliferated rapidly at about 35 dah. Meiosis of germ cell took place at about 55 dah. Whereas in male fish germ cells proliferated rapidly only after 130 dah. Meiosis of the germ cell took place at the same time. The gonadal differentiation in females occurred much earlier than that in males. |
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| Keywords: | Silurus meridionalis Gonadal sex differentiation Histological observation |
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