Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Morphological Development of Egg and Larvae of Hemiculter leucisculus

치리(Hemiculter leucisculus)의 난 발생 및 자치어 형태 발달

  • Kim, Kyeong-Mu (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Seung-Yong (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Song, Mi-Young (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Song, Ha-Yun (Inland Fisheries Research Institute, National Institute of Fisheries Science)
  • 김경무 (국립수산과학원 중앙내수면연구소) ;
  • 김승용 (국립수산과학원 중앙내수면연구소) ;
  • 송미영 (국립수산과학원 중앙내수면연구소) ;
  • 송하윤 (국립수산과학원 중앙내수면연구소)
  • Received : 2020.08.27
  • Accepted : 2020.11.17
  • Published : 2020.12.31
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Abstract

The egg development and early life history of Sharpbelly Hemiculter leucisculus were investigated. For the experiments, the mature adults were collected at the Lake Yedang in Korea. The eggs from the females were obtained by injecting 10 IU/g of human chorionic gonadotropin and inseminated by wet method in the laboratory. The fertilized eggs were 0.97±0.02 mm (0.9~1.0 mm n=30) in diameter. The embryo began to hatch about 32 hrs after fertilization under water temperature of 22±1℃. The newly-hatched larvae were 3.0±0.2 mm (2.6~3.4 mm, n=15) in total length, and they haven't Melanophore. Six days after hatching, the Preflexion larva were 5.7±0.1 mm (5.4~5.8 mm, n=15) in total length, and they began to eat a Rotifer. 17 days after hatching, the Flexion larva were 6.8±0.2 mm (6.5~7.0 mm, n=15) in total length, and a gas bladder develop above the intestine. 30 days after hatching, the Postflexion larva were 8.8±0.7 mm (7.9~10.3 mm, n=15) in total length, three dorsal fin rays began to develop in the membrane fins. 50 days after hatching, the Juvenile were 20.8±0.8 mm (18.8~24.6 mm, n=15) in total length, and all their fin-rays were formed.

본 연구는 충남 예당호에 서식하는 Hemiculter leucisculus의 초기생활사에 대하여 연구하였다. 성숙된 친어에 HCG (human chorionic gonadotropin)를 10 IU/g의 농도로 주사하여 12시간 후 성숙란을 확보하였으며, 성숙란을 습식법으로 인공 수정하였다. 수정란은 불투명한 담녹색 원형의 침성점착란으로 난경은 0.97±0.02 mm (0.9~1.0 mm, n=30)이었다. 수정란은 수온 22±1℃에서 수정 32시간 후 수정란의 50%가 부화를 완료하였으며, 부화자어의 전장은 3.0±0.2 mm (2.6~3.4 mm, n=15)로 채색은 무색투명하였다. 부화 6일 후 자어는 5.7±0.1 mm (5.4~5.8 mm, n=15)로 입과 항문이 열리고 로티퍼를 섭식하여 전기자어기로 이행하였다. 부화 17일 후 자어는 6.8±0.2 mm (6.5~7.0 mm, n=15)로 척색말단이 굴곡되어 중기자어기로 이행하였다. 부화 30일 후 8.8±0.7 mm (7.9~10.3 mm, n=15)로 등지느러미 기조가 발달하기 시작하였으며, 척색말단 굴곡이 완료되어 후기자어기로 이행하였다. 부화 50일 후 20.8±0.8 mm (18.8~24.6 mm, n=15)로 모든 지느러미의 기조가 정수에 도달하여 치어기로 이행하였다.

Keywords

Acknowledgement

본 연구는 2020년도 국립수산과학원 수산시험연구사업 내수면 수산자원 보호구역 환경 및 수산자원 연구(R2020030)의 지원으로 수행되었습니다.

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