Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Spawning Behavior and Characteristics of Siberian Stone Loach, Barbatula nuda (Nemacheilidae) in Sangcheoncheon Stream, a Tributary of Bukhangang River, Korea

북한강 지류 상천천에 서식하는 대륙종개 Barbatula nuda (Nemacheilidae)의 산란특성과 수조 내 산란행동

  • Yeong-Ho Kwak (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Jeong Bae Kim (Inland Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Ha-Yoon Song (Inland Fisheries Research Institute, National Institute of Fisheries Science)
  • 곽영호 (국립수산과학원 중앙내수면연구소) ;
  • 김정배 (국립수산과학원 중앙내수면연구소) ;
  • 송하윤 (국립수산과학원 중앙내수면연구소)
  • Received : 2022.12.20
  • Accepted : 2023.02.16
  • Published : 2023.02.28
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Abstract

In order to identify the spawning characteristics of Barbatula nuda, seven surveys were conducted from March to May 2021 in the Sangcheoncheon Stream, a tributary of the Bukhangang River, Korea. During the survey period, 890 individuals were collected, and the sex ratio of female to male was 1 : 1.34. B. nuda spawned 15 March to 24 April, when temperature was 12~15.7℃. Total length of the individual with minimum maturity was 56.7 mm, and it was a 1-year-old. Spawning was observed from individuals with a total length of 80.5 mm more, and it was 2-year-old. The total length at 50% group maturity was 67.2 mm. As a result of injecting 10 IU/g of HCG hormone into B. nuda, about 15 hours later, spawning behavior in which the male wrapped around the body of the female in a circle was observed. After spawning, females and males rested, and fertilized eggs were feed by individuals not participating in spawning.

대륙종개의 산란특성과 산란행동을 규명하기 위해 경기도 가평군 청평면에 위치한 북한강의 지류 상천천에서 2021년 3월부터 5월까지 7회 조사하였다. 전체 조사기간 동안 대륙종개 890개체가 채집되었으며 성비(♂:♀)는 1 : 1.34로 수컷이 암컷보다 많았다. 상천천의 대륙종개는 수온 12~15.7℃인 3월 15일~4월 24일에 산란하였다. 최소 성적성숙개체는 전장 56.7 mm였고 만 1년생 개체였으며, 전장 80.5 mm 이상 개체부터 산란이 관찰되었고 만 2년생 개체였다. 50% 군성숙전장은 67.2 mm로 나타났다. 대륙종개의 복강에 HCG호르몬 10 IU/g으로 주사한 결과, 약 15시간 후에 산란이 유도되었으며 수컷이 암컷의 몸을 원형으로 감는 산란행동이 관찰되었다. 산란 후 암컷과 수컷은 바닥에서 휴식을 취하였고 바닥에 떨어진 수정란은 산란에 참여하지 않은 개체들에게 일부 섭식되었다.

Keywords

Acknowledgement

본 연구는 2023년도 국립수산과학원 수산연구사업(R2023019)의 연구비 지원으로 수행되었습니다.

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