广东省科技计划项目(No.2002B21508)
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蓝太阳鱼（Lepomis cyanellus）是广东省于1997年从北美引进的小型淡水鱼类,本文采用组织切片技术对蓝太阳鱼的性腺发育进行了研究。蓝太阳鱼的性腺发育程序可以分为5个时期。在1月龄,卵巢和精巢处于第Ⅰ期;2~3月龄时,卵巢和精巢发育到第Ⅱ期;4月龄时发育到第Ⅲ期;5~6月龄时发育到第Ⅳ期;7~8月龄时达到性成熟第Ⅴ期。过冬时,卵巢退化到第Ⅱ~Ⅲ期,而精巢仍停留在第Ⅴ期。成熟卵巢的成熟系数为2.80%~8.10%,成熟精巢的成熟系数为1.45%~3.45%。精巢和卵巢发育都为不完全同步型,且精巢发育比卵巢稍快。蓝太阳鱼的繁殖期在广州地区为3~11月,为多次产卵类型。本文从生殖和生长的关系上对蓝太阳鱼生长缓慢的原因进行了初步探讨,并将蓝太阳鱼作为一种鱼类实验动物的可行性进行了分析。
Green Sunfish,Lepomis cyanellus,is a kind of small fresh-water fish introduced by Guangdong Province in 1997 from North America.Gonadal development of this species was studied by light microscopy.The developmental chronology of gonad is composed of 5 stages.At the age of 1 month,ovaries and testes were at stage Ⅰ,and both gonads developed to stage Ⅱ at the age of 2-3 months.Ovaries and testes developed to stage Ⅲ and stage Ⅳ respectively by 4 months and 5-6 months.The first maturity age was 7-8 months.During the winter,ovaries degenerated to stages Ⅱ-Ⅲ,and testes still stayed at stage Ⅴ.The maturation coefficient of matured ovaries was 2.80%-8.10%,and that of matured testes was 1.45%-3.45%.The development of ovaries and testes was asynchronous.This species spawn repeatedly and the spawning period lasts from March to November in Guangzhou region.The reason for this species' slow growth and the feasibility of L.cyanellus as an experimental model animal were discussed in this paper.
引用本文
曹运长,李文笙,叶卫,林浩然.2008.蓝太阳鱼第一次性周期性腺发育的组织学.动物学杂志,43(1):88-95.
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- 收稿日期:2007-06-12
- 最后修改日期:2007-11-03
