Presence of a Bisexual Gonad: Implications for Protogynous Sex Change in the White-Edged Lyretail Variola albimarginata (Serranidae)

IF 0.5 4区生物学 Q4 FISHERIES

Journal of Ichthyology Pub Date : 2024-08-12 DOI:10.1134/s0032945224700498

R. Seiwa, M. Kato, K. Nakaguchi, Y. Sakai

引用次数: 0

Abstract

We analyzed the morphology and gonad structure of Variola albimarginata based on nine specimens (TL 28.2–44.5 cm) collected off Kuchierabu-jima Island, southern Japan. Individuals exceeding TL 40 cm were identified as males, with males significantly larger than females (max TL 33.3 cm). The testes of V. albimarginata all exhibited a central lumen, suggesting a remnant of the ovarian cavity. An individual of intermediate size (TL 37.8 cm), positioned between males and females, possessed a bisexual gonad characterized by the presence of primary oocytes, atretic oocytes, and spermatocytes. These findings suggest the possibility that V. albimarginata undergo protogynous sex change in their life history.

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双性性腺的存在：白刃杓尾鱼（Serranidae）原生性变的意义

摘要我们根据在日本南部库奇拉布岛（Kuchierabu-jima Island）外海采集的9个标本（TL 28.2-44.5厘米）分析了Variola albimarginata的形态和性腺结构。TL超过40厘米的个体被鉴定为雄性，雄性明显大于雌性（最大TL为33.3厘米）。V. albimarginata的睾丸都有一个中央腔，表明是卵巢腔的残余部分。一个中等大小的个体（TL 37.8 厘米）介于雄性和雌性之间，具有双性性腺，其特征是存在初级卵母细胞、闭锁卵母细胞和精母细胞。这些研究结果表明，白鳍豚在其生活史中可能会发生原发性变性。

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来源期刊

Journal of Ichthyology Multiple-

CiteScore

1.00

自引率

28.60%

发文量

期刊介绍： Journal of Ichthyology is an international peer-reviewed journal published in collaboration with the Russian Academy of Sciences. It covers original studies in fish taxonomy, evolution, molecular biology, morphology, species diversity, zoological geography, genetics, physiology, ecology, behavior, reproduction, embryology, invasions, and protection. Some problems of applied ichthyology are also covered. The journal welcomes manuscripts from all countries in the English or Russian language.