臺灣之養殖鰻生殖腺之組織學研究初報

Preliminary Histological Study on the Gonadal Development of Pond-Reared Eels (Anguilla Japonica) in Taiwan

張月霞(Yea-Sha Chang) ； 廖一久(I-Chiu Liao)

《臺灣水產學會刊》 5卷2期 (1977/06) Pp. 61-67

https://doi.org/10.29822/JFST.197706.0006

摘要

為瞭解臺灣南部地區養鰻池中飼養之大型鰻魚之生殖腺發育情形，此次共測量並解剖大型鰻魚十一尾，結果六尾為雌鰻，五尾為雄鰻，雌鰻之體長和體重均比雄鰻者較長且較重。
六尾雌鰻之卵巢卵均為具有卵黄之卵母細胞(Yolky oocytes)，且發育最成熟者已達卵黄泡期(Yolk vesicle stage)和早期之第一卵黄球期(Primary yolk globule stage)。卵巢於七～八月間開始成熟，十二月～二月間達發育之最高峯，三～四月間逐漸萎縮退化。
五尾雄鰻雖屬同一年齡，但精巢成熟度却不相同，其中三尾之精巢屬於增殖期(Multiplication stage)，一尾為早期精母細胞期(Early spermatocyte stage)，另一尾最成熟者已達精子成熟期(Ripe stage)。

並列摘要

The present paper records the gonadal development of six female and five male pond-reared eels (Anguilla japonica). These eleven eels were obtained from eel farms at Pingtung area. It was found that both body weight and body length of every female are greater than those of males.
The ovaries examined were mostly composed of yolky oocytes. Among them the most developed one reached the yolk vesicle and early primary yolk globule stages. It might be summarized that the ovary had undergone vitellogenesis since summer (July to August) and reached the maximum mature stage in winter (December to February). It then degenerated in the following spring.
The male eels observed were of the similar age. However, they showed some degrees of variation in their testicular maturity-three in the multiplication stage, one in the early spermatocyte stage and the most mature one in the ripe stage.