한국어류학회지 (Korean Journal of Ichthyology)

  • 제35권3호
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  • Pages.177-182
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  • 2023
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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 서해에 출현하는 붕장어(Conger myriaster)의 식성

Feeding Habits of Whitespotted Conger, Conger myriaster in the West Sea of Korea

  • 강다연 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 김도균 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 성기창 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 진수연 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 정재묵 (국립수산과학원 수산자원연구센터) ;
  • 강수경 (국립수산과학원 수산자원연구센터) ;
  • 백근욱 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터)
  • Da Yeon Kang (Department of Marine Biology & Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Do-Gyun Kim (Department of Marine Biology & Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Gi Chang Seong (Department of Marine Biology & Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Suyeon Jin (Department of Marine Biology & Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Jae Mook Jeong (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Su Kyung Kang (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Gun Wook Baeck (Department of Marine Biology & Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University)
  • 투고 : 2023.05.03
  • 심사 : 2023.08.16
  • 발행 : 2023.08.31
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초록

한국 서해에 출현하는 붕장어(Conger myriaster)의 식성을 알아보기 위해 총 158개체의 붕장어를 분석하였으며, 채집된 붕장어의 항문장(Preanal length)은 8.2~40.1 cm (±17.3 cm)의 범위를 보였다. 공복률은 30.4%를 보였으며, 위내용물이 발견된 붕장어는 110개체였다. 총 21개의 먹이생물이 출현하였으며, 그중 4개는 과까지, 1개는 속까지, 16개는 종까지 분류되었다. 붕장어의 가장 중요한 먹이생물은 54.4%의 상대중요도 지수비(%IRI)를 나타낸 어류(Pisces)였다. 어류 중에서도 멸치(Engraulis japonicus)가 우점하였다. 어류 다음으로 중요한 먹이생물은 새우류(Macrura)로 39.6%의 상대중요도지수비를 차지하였고, 새우류 중에서는 마루자주새우(Crangon hakodatei)가 가장 우점하였다. 붕장어의 성장에 따른 먹이생물 변화를 분석한 결과, 성장함에 따라 새우류의 섭식비율은 감소하였고 어류의 섭식비율은 증가하는 경향이 나타났다. 또한, 성장함에 따라 개체당 평균 먹이생물의 중량이 유의하게 증가하는 양상을 보였다.

Total 158 Conger myriaster were examined and the range of Preanal length (PaL) was 8.2~40.1 cm and average Preanal length was 17.3 cm. Proportion of the empty stomach was 30.4% and individuals, which the prey items were found in stomach, were 110. The most important prey component in the diets of C. myriaster was Pisces that constituted 54.4% in %IRI (Index of relative importance). Engraulis japonicus was the most important prey component in Pisces. Macrura was the second largest prey component and Crangon hakodatei was the most important prey component in Macrura. The result of analysis in ontogenetic changes significantly exhibited among three size classes (<15.0 cm, 15.0~20.0 cm, ≥20.0 cm). The proportion of Macrura decreased as increasing body size, whereas the consumption of Pisces increased gradually. As body size of C. myriaster increased, the mean weight of prey per stomach (mW/ST) increased (one way-ANOVA, P<0.05).

키워드

과제정보

이 논문은 2023년도 국립수산과학원 수산과학연구사업(R2023001)의 지원을 받아 수행된 연구입니다.

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