Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Spawning Period and Sex Inversion of Black Seabream Acanthopagrus schlegelii Collected off the Coast of Tongyeong, Korea

통영 연안에서 채집된 감성돔(Acanthopagrus schlegelii)의 산란시기와 성전환

  • Lee, Hae Won (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Jeong, Jae Mook (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Yu, Hyo Jae (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Hwang, Kang Seok (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Oh, Si Eun (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Song, Se Hyun (Fisheries Resources Management Division, National Institute of Fisheries Science)
  • 이해원 (국립수산과학원 수산자원연구센터) ;
  • 정재묵 (국립수산과학원 수산자원연구센터) ;
  • 유효재 (국립수산과학원 수산자원연구센터) ;
  • 황강석 (국립수산과학원 수산자원연구센터) ;
  • 오시은 (국립수산과학원 수산자원연구센터) ;
  • 송세현 (국립수산과학원 연근해자원과)
  • Received : 2021.03.08
  • Accepted : 2021.03.16
  • Published : 2021.03.31
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Abstract

This study sought to reveal spawning period and sex inversion of black seabream, Acanthopagrus schlegelii collected off the coast of Tongyeong, Korea. The monthly gonodosomatic index (GSI) showed the same pattern of between both sexes, and it was estimated that black seabream spawned once a year (between April and May). Histological examination revealed the transition from male to female sex, size of fork length bisexual gonad with ovarian (primary hermaphrodite; progress from male to female, MF) was seen at 20.5 to 39.6 cm and bisexual gonad with testicular (post hermaphrodite; female development and Male degeneration, FM) was seen at 26.4 to 50.2 cm. The egg diameters was in the range of 0.02 to 0.60 mm, with the smallest average egg diameter of 0.09 mm in February, the highest average egg diameters of 0.43 mm in August, and the range of fecundity was number of eggs 277,148 (33.9 cm) to 2,772,421 (34.1 cm).

본 연구는 연안에 서식하는 감성돔의 산란생태학적 연구를 위해 2020년 2월부터 2021년 1월까지 통영 연안에서 어획된 시료 총 470개체(가랑이체장 20.5~50.2 cm)를 대상으로 하였다. 통영에 서식하는 감성돔의 월별 생식소숙도지수(GSI) 변화를 통해 암수 모두 동일한 양상을 보이며 4~5월이 산란시기로 추정되었고, 연 1회 산란하는 것으로 확인되었다. 조직학적 검경을 통해 수컷에서 암컷으로 성전환하는 과정을 확인하였으며, 전기자웅동체(MF)는 20.5~39.6 cm에서 보였고, 후기자웅동체(FM)는 26.4~50.2 cm에서 보였다. 난경은 0.02~0.60 mm 범위였으며, 2월에 평균 난경은 0.09 mm로 가장 작았고, 8월에 평균 난경은 0.43 mm 가장 높았고, 포란수는 277,148 (33.9 cm)~2,772,421 (34.1 cm)립의 범위를 보였다.

Keywords

Acknowledgement

이 논문은 2021년도 국립수산과학원 근해어업자원조사(R2021027)의 지원을 받아 수행된 연구입니다.

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