Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Maturity and Spawning of Black Edged Sculpin, Gymnocanthus herzensteini in the East Sea

우리나라 동해안 대구횟대, Gymnocanthus herzensteini의 성숙과 산란

  • Park, Kie Young (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • Park, Kyeang Hun (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • Lee, Sung Il (East Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Park, Heon Woo (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • Hong, Sung Eic (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • Yang, Jae Hyeong (East Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Choi, Soo Ha (Faculty of Marine Bioscience & Technology, Kangnung National University)
  • 박기영 (강릉대학교 해양생명공학부) ;
  • 박경훈 (강릉대학교 해양생명공학부) ;
  • 이성일 (국립수산과학원 동해수산연구소) ;
  • 박헌우 (강릉대학교 해양생명공학부) ;
  • 홍성익 (강릉대학교 해양생명공학부) ;
  • 양재형 (국립수산과학원 동해수산연구소) ;
  • 최수하 (강릉대학교 해양생명공학부)
  • Received : 2007.03.07
  • Accepted : 2007.04.02
  • Published : 2007.06.30
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Abstract

We investigated the maturity and spawning of black edged sculpin, Gymnocanthus herzensteini caught by gillnet in the East Sea from March 2003 to February, 2004. We analyzed monthly changes in maturity stages, gonadosomatic index (GSI), gonad weight (GW), egg diameter, fecundity, total length at 50% group maturity and sex ratio. The spawning period was December to February. The fecundity ranged form 8,814 eggs at 14.7 cm (TL) to 25,560 eggs at 24.4 cm (TL). The relationship between total length (TL) and fecundity (F) was $F=285.11TL^{1.4092}$ ($R^2$ =0.571) and fecundity increased with total length. The total length at 50% group maturity was estimated to be 15.25 cm. The sex ratio was 60 for female and 40 for male, where the female population was seen to be slightly predominant. For sex ratio by length class, male was a little predominant in small size, but female was 90% more than 24 cm.

본 연구는 2003년 3월부터 2004년 4월까지 강원도 연안에서 유자망어업에서 어획된 대구횟대를 매월 채집하여 성숙과 산란에 관하여 조사한 것이다. 대구횟대의 산란기는 생식소성숙도지수, 난경 등의 월별 변화에 의한 결과 12월에서 이듬해 2월로 추정되어졌다. 체장과 포란수와의 관계는 $F=285.11TL^{1.4092}$ ($R^2$=0.571)이었으며 체중과 포란수와의 관계는 $F=1.449.8BW^{0.5514}$ ($R^2$=0.577)이었으며, 포란수는 어체가 커질수록 증가하였다. 최소포란수로 8.814립 (TL: 14.7 cm), 최대포란수는 28,560립 (TL: 24.4 cm)이었다. 최소성숙체장은 15 cm였으며, 이때의 나이는 약 2세였다. 체장계급별 성비는 소형어에서는 수컷이 약간 우세하였으나 24 cm 이상에서는 암컷이 90%로 높게 나타났다.

Keywords

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