Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Feeding Habits of the Pacific Cod Gadus macrocephalus in the Coastal Waters off Jumunjin, Gangwondo of Korea

강원도 주문진 해역에 출현하는 대구(Gadus macrocephalus)의 식성

  • Yoon, Sang-Chul (Fisheries Resources Management Division, National Fisheries Research and Development Institute) ;
  • Yang, Jae-Hyeong (Fisheries Resources Management Division, National Fisheries Research and Development Institute) ;
  • Park, Jeong-Ho (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Choi, Young-Min (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Park, Jong-Hwa (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Lee, Dong-Woo (Fisheries Resources Management Division, National Fisheries Research and Development Institute)
  • 윤상철 (국립수산과학원 자원관리과) ;
  • 양재형 (국립수산과학원 자원관리과) ;
  • 박정호 (동해수산연구소 자원환경과) ;
  • 최영민 (동해수산연구소 자원환경과) ;
  • 박종화 (동해수산연구소 자원환경과) ;
  • 이동우 (국립수산과학원 자원관리과)
  • Received : 2012.03.08
  • Accepted : 2012.08.03
  • Published : 2012.08.31
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Abstract

The feeding habits of the Pacific cod Gadus macrocephalus were studied by analyzing the stomach contents of 423 specimens caught by coastal gill net in the coastal waters off Jumunjin, Gangwondo, Korea, from January to December, 2011. The size of Pacific cod ranged from 31.0 to 86.5cm in total length (TL). The proportion of empty stomachs was 25.1%. The main prey items were Macrura, Pisces, and Cephalopoda. In order of abundance, the most dominant species of Macrura, were Pandalus eous, Argis lar, and Neocrangon communis, and the most dominant species of Pisces, were Clupea pallasii, Actoscopus japonicus, and Glyptocephalus stelleri. Berryteuthis magister was the most dominant species of Cephalopoda. In terms of variation in feeding habits by growth, Macrura was the most important prey group for G. macrocephalus ranging in TL from 30- to 55 cm, but Pisces was the most important prey group for cod over 56 cm TL. Catch of G. macrocephalus was significantly positively correlated to catch of the three major Pisces prey species Clupea pallasii, Actoscopus japonicus and Glyptocephalus stelleri.

Keywords

References

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