{"title":"Presence of a Bisexual Gonad: Implications for Protogynous Sex Change in the White-Edged Lyretail Variola albimarginata (Serranidae)","authors":"R. Seiwa, M. Kato, K. Nakaguchi, Y. Sakai","doi":"10.1134/s0032945224700498","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>We analyzed the morphology and gonad structure of <i>Variola albimarginata</i> based on nine specimens (<i>TL</i> 28.2–44.5 cm) collected off Kuchierabu-jima Island, southern Japan. Individuals exceeding <i>TL</i> 40 cm were identified as males, with males significantly larger than females (max <i>TL</i> 33.3 cm). The testes of <i>V. albimarginata</i> all exhibited a central lumen, suggesting a remnant of the ovarian cavity. An individual of intermediate size (<i>TL</i> 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 <i>V. albimarginata</i> undergo protogynous sex change in their life history.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Ichthyology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1134/s0032945224700498","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"FISHERIES","Score":null,"Total":0}
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.
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.
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