Gonadal Abnormality and Intersexuality of Oplegnathus fasciatus (Teleostei: Oplegnathidae) Collected from the Southern Coast of Korea: A Case Report

We report on the gonadal structure abnormality and intersexuality found from a survey regarding the reproductive potential of the rock bream, , along the southern coast of Korea. In total, 448 samples were collected for histological analysis (total length 27.5±6.8 cm; total weight 522.9±385.6 g). Th...

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Veröffentlicht in:Balsaeng'gwa saengsig 2021, 25(3), , pp.123-131
Hauptverfasser: Choi, Ji Sung, Shin, So Ryung, Kim, Hyeon Jin, Kim, Hyejin, Kim, Yeonghye, Lee, Jung Sick
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Sprache:eng
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Zusammenfassung:We report on the gonadal structure abnormality and intersexuality found from a survey regarding the reproductive potential of the rock bream, , along the southern coast of Korea. In total, 448 samples were collected for histological analysis (total length 27.5±6.8 cm; total weight 522.9±385.6 g). The sex ratio (F:M) was 1:0.46 (n=307:141), with 68.5% being females. The frequency of oocyte atresia and ovarian neoplasm in the females was 85.3% and 21.5%, respectively, and the frequency of testicular lobule and cyst deformation and testicular neoplasm in the males was 73.1% and 37.6%, respectively. The scale formation in the ovary and testis was approximately 2.0% for both sexes. The intersexuality was 42.2%, with the intersexuality among females being 49.5%, which was significantly higher than that of males (26.2%). Such findings indicate a negative impact on the reproductive output of the rock bream along the southern coast of Korea; however, a more detailed study is required to ascertain accurate causes.
ISSN:2465-9525
2465-9541
DOI:10.12717/DR.2021.25.3.123