GONAD DIFFERENTIATION AND BODY GROWTH IN ANGUILLA-ANGUILLA L
GONAD DIFFERENTIATION AND BODY GROWTH IN ANGUILLA-ANGUILLA L
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DOI：
10.1111/j.1095-8649.1984.tb04792.x
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发表时间：
1984-01-01
影响因子：
2
通讯作者：
ROSSI, R
中科院分区：
文献类型：
--
作者：
COLOMBO, G;GRANDI, G;ROSSI, R
使用组织学切片，对 2 个种群的黄鳗和银鳗样本的性腺进行了检查。之前对人口的增长和性别比进行了分析。观察到的组织学结构与先前出版物中描述的欧洲鳗鱼（A. anguilla）和太平洋鳗鱼（A. japonica）的组织学结构相似。银鳗具有分化良好的性腺。黄鳗的年龄从 0 岁以上到 2 岁以上，体长从 20 厘米到银色，未分化，具有两性性腺。即使在幼鳗和小鳗鱼中也能发现卵巢，在非常早期的阶段就已经完全分化。黄鳗的睾丸样性腺是一种更原始且可能可逆的性腺，在性成熟开始和银相转变时完全分化。
Using histological sections, the gonads of samples of yellow and silver eels of 2 populations were examined. The populations were previously analyzed for growth and sex ratio. The histological structures observed are similar to those described in previous publications for the European eel, A. anguilla and to those indicated for the Pacific eel, A. japonica. Well-differentiated gonads are present in the silver eels. In the yellow eels, ranging in age from 0+ to 2+ yr and from a length of 20 cm to that at which they become silver, undifferentiated and both sex gonads are found. The ovary, found even in young and small eels, is completely differentiated at a very early stage. The testis-like gonad of the yellow eel is a more primitive, and possibly reversible, gonad which differentiates completely at the beginning of sexual maturation and the change to the silver phase.