Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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First Morphological Description of Thryssa kammalensis (Engraulidae, Clupeiformes) Larvae and Juveniles Collected from the Southwestern Coasts of Korea

한국 서해 남부연안에서 채집된 청멸, Thryssa kammalensis (멸치과, 청어목) 자치어의 첫 형태 기재

  • Hyeon-Jun Ryu (Department of Marine Biology, Pukyong National University) ;
  • Se-Hun Myoung (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Ho-Sun Sohn (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Jin-Koo Kim (Department of Marine Biology, Pukyong National University)
  • 류현준 (국립부경대학교 수산생명과학부 자원생물학전공) ;
  • 명세훈 (국립수산과학원 수산자원연구센터) ;
  • 손호선 (국립수산과학원 수산자원연구센터) ;
  • 김진구 (국립부경대학교 수산생명과학부 자원생물학전공)
  • Received : 2024.07.03
  • Accepted : 2024.08.23
  • Published : 2024.08.31
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Abstract

In June and July 2023, a total of 101 Thryssa kammalensis larvae and juveniles were collected during an ichthyoplankton survey using RN80 in the waters around the southwest coasts of Korea. When pre-flexion larval stage (3.77~10.20 mm NL, n=22), some individuals have pterygiophores of dorsal and anal fins, but no apparent fin rays were formed. Line-shaped melanophores were distributed in a row from below the opercle to the anal fin base. When flexion larval stage (12.13~16.69 mm SL, n=14), the number of dorsal and anal fin rays were 13~15 and 18~23. Dot and line-shaped melanophores were distributed in a row in the ventral portion of the abdominal cavity, and melanophores appeared on the caudal fin. When post-flexion larval stage (17.23~21.73 mm SL, n=20), all fin rays appeared, and the number of pectoral, pelvic, anal and dorsal fin rays were 7~9, 4~5, 29~31 and 14~15, respectively. Dot and line-shaped melanophores were distributed in a row from the posterior of the preopercle to the ventral portion of the abdominal cavity, oval-shaped melanophores were distributed along the anal fin base, and melanophores concentrated lower lobe of the caudal fin. When juvenile stage (18.43~25.98 mm SL, n=45), the number of pectoral, pelvic, anal and dorsal fin rays were completed as 12~15, 7~8, 30~33 and 14~15, respectively. Point-shaped melanophores of the ventral position of the abdominal cavity disappeared, it continued in a row along the anal fin base to the lower caudal peduncle. Our results suggest that Thryssa kammalensis may use the sea around Chilsan-do Island as spawning and/or nursery ground between June and July.

2023년 6월과 7월에 한국 서해 남부해역의 칠산도 주변에서 RN80 네트로 청멸 자치어 101개체가 채집되었다. 전기자어(3.77~10.20 mm SL, n=22)는 지느러미 연조도 전혀 발달하지 않았고, 선 모양의 흑색소포가 새개부 아래부터 뒷지느러미 기저까지 일렬로 배열되어 있었다. 중기자어(12.13~16.69 mm SL, n=14)는 등지느러미 연조수가 13~15개, 뒷지느러미 연조수가 18~23개로 각각 관찰되었고, 복강의 배쪽에 점과 선 모양의 흑색소포가 항문 앞까지 일렬로 이어졌고, 꼬리지느러미 하엽에 부정형의 흑색소포가 관찰되었다. 후기자어(17.23~21.73 mm SL, n=20)는 모든 지느러미 연조가 출현하였으며, 가슴지느러미, 배지느러미, 뒷지느러미와 등지느러미 연조수는 각각 7~9개, 4~5개, 29~31개, 14~15개로 나타났다. 부정형의 흑색소포가 꼬리지느러미 하엽에 집중적으로 나타나며 이는 다른 멸치과 어류에서는 나타나지 않는 특징이다. 치어(18.43~25.98 mm SL, n=45)는 가슴지느러미 연조수가 12~15개, 배지느러미 연조수가 7~8개, 뒷지느러미 연조수가 30~33개, 등지느러미 연조수가 14~15개로 모든 지느러미가 정수에 도달하였다. 자어 시기에 존재하던 복강 배쪽의 점 모양의 흑색소포와 꼬리지느러미 하엽의 부정형의 흑색소포가 소멸되고, 뒷지느러미 기저를 따라 꼬리자루 아래쪽까지 일렬로 이어졌다. 본 연구는 국내 청멸이 6~7월에 서해 남부해역 칠산도 주변 해역을 산란장 및 성육장으로 이용하는 것을 시사한다.

Keywords

Acknowledgement

시료 협조에 도움을 주신 부경대학교 해양생물학과 이유진, 정시영, 장재훈, 김수빈, 진주원 대학원생과 본 논문의 질적 향상을 위해 도움을 주신 두 분 심사위원께 감사드립니다. 본 연구는 국립수산과학원 근해어업자원조사(R2024001) 및 국립해양생물자원관 '해양생명자원 기탁등록보존기관 운영(2024) 사업'의 지원을 받아 수행되었습니다.

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