Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Feeding Habits of the Sandfish, Arctoscopus japonicus in the Coastal Waters of East Sea, Korea

한국 동해 연안에 출현하는 도루묵(Arctoscopus japonicus)의 식성

  • Jin, Suyeon (Department of Marine Biology and Aquaculture Science/Department of Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Kim, Do-Gyun (Department of Marine Biology and Aquaculture Science/Department of Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Seong, Gi Chang (Department of Marine Biology and Aquaculture Science/Department of Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Kang, Da Yeon (Department of Marine Biology and Aquaculture Science/Department of Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Lee, Ju Eun (Department of Marine Biology and Aquaculture Science/Department of Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Park, Hyun-sol (Department of Marine Biology and Aquaculture Science/Department of Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Yang, Hye-jin (Department of Marine Biology and Aquaculture Science/Department of Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Soh, Ho Young (Department of Ocean Integrated Science, Chonnam National University) ;
  • Baeck, Gun Wook (Department of Marine Biology and Aquaculture Science/Department of Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University)
  • 진수연 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 김도균 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 성기창 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 강다연 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 이주은 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 박현솔 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 양혜진 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 서호영 (전남대학교 해양융합과학과) ;
  • 백근욱 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터)
  • Received : 2022.05.30
  • Accepted : 2022.06.20
  • Published : 2022.06.30
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Abstract

The feeding habits of sandfish, Arctoscopus japonicus were studied using 781 specimens collected by Eastern Sea Danish and gill net from January 2020 to December 2021 in the coastal waters of East Sea, Korea. The size of the specimens ranged from 14.8 to 25.4 cm in total length. A. japonicus were fed mainly on amphipods that constituted 54.7% in IRI. Cephalopods were the second largest prey component. The diets also include small quantities of euphausiids, crabs, shrimps, fishes, and worms. The diet composition of A. japonicus showed changes in season. The cephalopods feeding rate was highest in summer, whereas the proportion of euphausiids was higher in spring than in other seasons. The proportion of cephalopods has increased as the body size of A. japonicus increased, whereas the proportion of amphipods and euphausiids decreased gradually. As the body size of A. japonicus increased the mean weight of prey per the stomach (mW/ST) tended to increase significantly (One-way ANOVA, P<0.05).

이번 연구에 사용된 도루묵은 2020년 1월부터 2021년 12월까지 우리나라 동해에서 동해구외끌이저인망과 연안자망 어업을 통해 총 781개체를 채집하였다. 채집된 도루묵의 전장범위는 14.8~25.4 cm였다. 도루묵의 가장 중요한 먹이생물은 54.7%의 상대중요도지수비를 나타낸 단각류였으며, 그 다음으로는 각각 33.7%와 11.6%를 차지한 두족류와 난바다곤쟁이류였다. 그외 게류, 새우류, 어류, 갯지렁이류가 출현하였으나 그 양은 매우 적었다. 계절별 위내용물 조성을 살펴본 결과, 모든 계절에 단각류를 주로 섭식하였으며, 여름철에 두족류의 섭식비율이 가장 높았으며, 봄철에 난바다곤쟁이류의 비율이 가장 높았다. 크기군별 위내용물 조성을 살펴본 결과, 도루묵은 모든 크기군에서 단각류가 가장 중요한 먹이생물이었으며, 성장함에 따라 단각류와 난바다곤쟁이류의 비율은 감소하고 두족류의 비율은 증가하는 경향이 관찰되었다. 개체당 평균먹이생물 개체수는 유의한 차이를 보이지 않은 반면, 중량은 크기군이 증가함에 따라 증가하는 경향이 관찰되었다.

Keywords

Acknowledgement

이 논문은 2022년 해양수산부 재원으로 해양수산기술진흥원의 지원을 받아 수행된 연구임(ICT기반 수산자원관리연구센터).

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