Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Morphological Development of Eggs, Larvae and Juveniles of the Sarcocheilichthys variegatus wakiyae in Yeongsangang River, Korea

영산강에 서식하는 참중고기 Sarcocheilichthys variegatus wakiyae의 난발생 및 자치어 형태발달

  • 박재민 (경상북도 토속어류산업화센터) ;
  • 한경호 (전남대학교 수산과학과)
  • Received : 2022.02.04
  • Accepted : 2022.02.28
  • Published : 2022.03.31
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Abstract

The eggs development and early life history of Sarcocheilichthys variegatus wakiyae was investigated. The adult fishes were collected in Yeongsangang River, Damyang-gun, Jeollanam-do, Korea, and their spawning inducement was carried by sex maturation hormone (Ovaprim) injections. Spawning amount was mean 31±3.5 Mature eggs were cicular in shape and mean 2.40±0.05 mm in diameter. Hatching period of the embryo was 230 to 240 hours after fertilization under water temperature of 22℃. The newly hatched larvae were 10.7±0.19 mm in total length (TL). 3 days after hatching, postlarvae was measured 12.0±0.13 mm in TL and the tip of the caudal fin was bent at 45°. 11 days after hatching, it was measured 14.6±0.13 mm in TL, and transferred to juvenile as the number of fins (iii7 dorsal fin, iii6 anal fin, i7 ventral fins) reached a constant number of each part.

본 연구는 참중고기 Sarcocheilichthys variegatus wakiyae의 난발생 및 자치어 형태발달을 관찰하여 초기생활사 특징을 밝히고 유연종과 난 및 부화자어 크기, 후기자어 및 치어기 이행시기를 비교 논의하고자 실시하였다. 연구에 사용된 친어는 전남 담양군의 영산강 일원에서 채집하였고 호르몬(Ovaprim)을 주사하여 산란을 유도하였다. 산란량은 평균 31±3.5개였고, 성숙란은 원형이었다. 성숙란의 크기는 평균 2.40±0.05 mm였다. 부화시간은 수온 22℃에서 230~240시간이 소요되었다. 부화자어 크기는 평균 10.7±0.19 mm였고, 부화 후 3일 평균 크기 12.0±0.13 mm일 때 척추 끝부분이 45°로 완전히 휘어졌고 후기자어기로 이행하였다. 부화 후 11일째 평균크기 14.6±0.13 mm일 때 모든 지느러미의 기조 수(등지느러미 iii7, 뒷지느러미 iii6, 배지느러미 i7)가 정수에 달하면서 치어기로 이행하였다.

Keywords

Acknowledgement

본 연구의 친어확보 및 사진촬영에 도움을 주신 보령민물생태관 조성장 대표님, 한국의 물고기 이건우 매니저님께 감사의 말씀을 드립니다.

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