Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Maturity and Spawning of Spinyhead Sculpin, Dasycottus setiger (Bean) in the East Sea, Korea

동해안 고무꺽정이, Dasycottus setiger (Bean)의 성숙과 산란

  • Yang, Jae Hyeong (East Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Lee, Sung Il (East Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Hwang, Seon Jae (National Fisheries Research & Development Institute) ;
  • Park, Jong Hwa (National Fisheries Research & Development Institute) ;
  • Kwon, Hyeok Chan (East Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Park, Kie Young (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • Choi, Soo Ha (Faculty of Marine Bioscience & Technology, Kangnung National University)
  • 양재형 (국립수산과학원 동해수산연구소) ;
  • 이성일 (국립수산과학원 동해수산연구소) ;
  • 황선재 (국립수산과학원) ;
  • 박종화 (국립수산과학원) ;
  • 권혁찬 (국립수산과학원 동해수산연구소) ;
  • 박기영 (강릉대학교 해양생명공학부) ;
  • 최수하 (강릉대학교 해양생명공학부)
  • Received : 2007.03.26
  • Accepted : 2007.09.04
  • Published : 2007.09.30
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Abstract

Maturity and spawning of spinyhead sculpin, Dasycottus setiger were investigated using samples collected by the eastern sea danish seine and gillnet in the East Sea of Korea from January to December 2004. We analyzed monthly changes in maturity stages, gonadosomatic index (GSI), egg diameter, fecundity, total length at 50% group maturity, and sex ratio. GSI began to increase in August, reached a maximum between September and November, and decreased in December. The spawning period was August to December, and the main spawning period was September to November. The fecundity ranged from 6,210 eggs at 22.3 cm (TL) to 15,898 eggs at 32.2 cm (TL). The relationship between total length (TL) and fecundity (F) was $F=25.475TL^{1.818}$ ($R^2=0.761$), and F increased with TL. The TL at 50% group maturity was estimated to be 23.4 cm. The sex ratio was 1 : 1.3 (female : male), indicating the male population was seem to be slightly predominant.

본 연구는 우리나라 동해안에 서식하는 고무꺽정이의 성숙과 산란에 관한 연구로, 2004년 1월부터 12월까지 동해구 기선저인망 및 자망어업에 의해 어획된 시료를 구입하여 수행하였다. 암컷의 생식소 발달과정 및 생식소중량지수의 월 변화로부터 고무꺽정이의 산란기는 8~12월, 주 산란기는 9~11월로 추정되었다. 포란수는 최소 6,210개 (전장 22.3 cm)에서 최대 15,898개(전장 32.2 cm)로 계수되었으며, 전장 (TL)과 포란수 (F)간의 관계식은 $F=25.475TL^{1.818}$ ($R^2=0.761$)으로, 전장이 커질수록 포란수도 증가하는 경향을 보였다. 산란에 참여하는 50% 군성숙 체장은 23.4 cm이었고, 전 조사기간에 대한 성비(암: 수)는 1 : 1.3으로 수컷이 암컷보다 우세하였다.

Keywords

Acknowledgement

Grant : 동해연안어업자원관리연구

Supported by : 국립수산과학원

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