Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Diet Composition of Skinnycheek Lanternfish, Benthosema pterotum in the Coastal Waters of South Sea, Korea

한국 남해에 출현하는 깃비늘치(Benthosema pterotum)의 위내용물 조성

  • Suyeon 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) ;
  • Gi Chang Seong (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) ;
  • Do-Gyun Kim (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) ;
  • Da Yeon Kang (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) ;
  • Hyeon Ji Kim (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Gun Wook Baeck (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) ;
  • 성기창 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 김도균 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 강다연 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터) ;
  • 김현지 (국립수산과학원 수산자원연구센터) ;
  • 백근욱 (경상국립대학교 해양생명과학과/양식생명과학과/해양산업연구소/해양생물교육연구센터)
  • Received : 2023.04.13
  • Accepted : 2023.05.18
  • Published : 2023.05.31
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Abstract

The diet composition of skinnycheek lanternfish, Benthosema pterotum were collected by bottom trawl net in the South Sea of Korea during 2021 (February, May, August, and November) and 2022 (February, April, August, and November). The size of the specimens ranged from 16 to 73 mm in total length. B. pterotum were mesopelagic carnivores that mainly consumed euphausiids and copepods. Its diets included small quantities of amphipods, shrimps, mysids, etc. We calculated the trophic level as 3.16 for B. pterotum. The individuals of small size class (<40 mm) fed mainly on copepods. In the next size classes (40~45 mm, 45~50 mm, 50~55 mm), copepods' proportion decreased and euphausiids increased. In the largest class (55~60 mm and ≥60 mm), the proportion of euphausiids' decreased, and shrimps increased. As the body size of B. pterotum increased the mean weight of prey per stomach (mW/ST) tended to significantly increase (One-way ANOVA, P<0.05).

이번 연구에 사용된 깃비늘치는 2021년 2, 5, 8, 11월과 2022년 2, 4, 8, 11월에 우리나라 남해에서 저인망으로 채집하였으며, 채집된 깃비늘치의 전장범위는 16~73 mm였다. 깃비늘치의 가장 중요한 먹이생물은 난바다곤쟁이류와 요각류였으며, 그 외 단각류, 새우류, 곤쟁이류를 섭식하였으나 그 양은 매우 적었다. 깃비늘치의 영양단계는 3.16으로 나타났다. 크기군별 먹이생물 조성변화를 분석한 결과, <40 mm 크기군에서는 요각류를 주로 섭식하였으며, 성장함에 따라 난바다곤쟁이류의 비율이 증가하였고, 가장 큰 크기군인 ≥60 mm에서는 난바다곤쟁이류의 비율이 감소하고 새우류의 비율이 증가하는 결과가 나타났다. 개체당 평균먹이생물의 개체수는 유의한 차이를 보이지 않은 반면, 중량은 크기군이 증가함에 따라 유의하게 증가하는 경향이 관찰되었다.

Keywords

Acknowledgement

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

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