한국어류학회지 (Korean Journal of Ichthyology)

  • 제34권3호
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  • Pages.172-178
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  • 2022
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  • 1225-8598(pISSN)
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  • 2288-3371(eISSN)
한국어류학회 (The Ichthyological Society of Korea)
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한국 남해에서 출현하는 눈볼대(Doederleinia berycoides)의 식성과 영양단계

Feeding Habits and Trophic Level of Blackthroat Seaperch, Doederleinia berycoides in the South Sea of Korea

  • 김도균 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 김현지 (국립수산과학원 수산자원연구센터) ;
  • 이승종 (국립수산과학원 수산자원연구센터) ;
  • 백근욱 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터)
  • Kim, Do-Gyun (Department of Marine Biology & Aquaculture/Department of Aquaculture Science/Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • Kim, Hyeon Ji (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Lee, Seung-Jong (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Baeck, Gun Wook (Department of Marine Biology & Aquaculture/Department of Aquaculture Science/Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
  • 투고 : 2022.05.30
  • 심사 : 2022.07.06
  • 발행 : 2022.09.30
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초록

눈볼대는 중, 대형 외끌이 어업을 비롯한 기선저인망어업에 어획되는 대표적인 어종으로 생산금액 증가와 어획량, 수산식품 선호도를 보았을 때, 상업적인 가치는 더욱 높아질 것으로 판단된다. 해양생태계가 변화하고 있지만, 눈볼대 섭식생태에 관한 선행연구는 2004년부터 2008년까지 채집된 개체들을 대상으로 수행이 되어 추가 연구수행이 필요하다. 남해에서 저층트롤어업으로 채집된 눈볼대 701개체의 전장범위는 3.3~33.1 cm로 나타났으며, 공복률은 78.3%였다. 눈볼대의 주먹이생물은 어류였으며, 어류 중에서도 멸치가 가장 우점하였다. 눈볼대는 성장함에 따라 단각류, 새우류와 같은 갑각류에서 어류로 먹이생물의 전환이 이루어지는 것으로 관찰되었다. 먹이 섭식 특성의 경우, 개체당 먹이생물의 평균 중량 (mW/ST)은 성장함에 따라 지속적으로 증가했고, 평균 먹이생물의 개체수(mN/ST)는 감소하다가 증가하는 것으로 나타났다. 영양단계의 범위는 3.31±0.52~3.79±0.70으로 나타났으며, 평균 영양단계는 3.62±0.64로 나타났다.

To investigate the feeding habits and trophic level of the blackthroat seaperch, Doederleinia berycoides in the South Sea of Korea, fish samples were collected by a bottom trawl net from fisheries resources survey vessels of NIFS in February, May, August and November 2021. The total length (TL) of these specimens was from 3.3 to 33.1 cm. D. berycoides fed majorly on Teleostei (especially Engraulis japonicus) based on index of relative importance (%IRI=64.4%). D. berycoides underwent an ontogenetic dietary shift. Smaller individuals (<10.0 cm TL) fed mainly on amphipods. The proportion of amphipods decreased as body size increased, whereas the consumption of Teleostei increased gradually. Examination of the feeding habits according to ontogentic feeding patterns in the diets of D. berycoides revealed that the mean weight of prey (mW/ST) continuously increased, while mean number of prey (mN/ST) decreased and then increased. The estimated average trophic level of the D. berycoides was 3.62±0.64, ranging from 3.31±0.52 to 3.79±0.70.

키워드

과제정보

이 논문은 2022년도 국립수산과학원 수산과학연구사업(R2022030)의 지원으로 수행된 연구입니다.

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