Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Feeding Habits of the Larval Ammodytes japonicus in the Coastal Waters of Gujora and Mangchi of Geoje, Korea

거제시 구조라 및 망치 연안에 출현하는 까나리(Ammodytes japonicus) 자어의 식성

  • Kang, Da Yeon (Department of Seafood & Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University) ;
  • Nam, Ki-Mun (Pukyong Marine Life Institute) ;
  • Choi, Ok-In (Korea Fisheries Resources Agency, South Sea Branch) ;
  • Park, Kyeong Hyun (Korea Fisheries Resources Agency, South Sea Branch) ;
  • Kim, Byeong Seop (Korea Fisheries Resources Agency, South Sea Branch) ;
  • Kim, Yoon Jung (Korea Fisheries Resources Agency, South Sea Branch) ;
  • Baeck, Gun Wook (Department of Seafood & Aquaculture Science/Institute of Marine Industry/Marine Bio-Education & Research Center, College of Marine Science, Gyeongsang National University)
  • 강다연 (경상대학교 해양식품생명의학과/해양산업연구소/해양생물교육연구센터) ;
  • 남기문 (부경해양생물연구소) ;
  • 최옥인 (수산자원관리공단 남해본부) ;
  • 박경현 (수산자원관리공단 남해본부) ;
  • 김병섭 (수산자원관리공단 남해본부) ;
  • 김윤정 (수산자원관리공단 남해본부) ;
  • 백근욱 (경상대학교 해양식품생명의학과/해양산업연구소/해양생물교육연구센터)
  • Received : 2020.04.02
  • Accepted : 2020.05.28
  • Published : 2020.06.30
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Abstract

The feeding habits of larval Ammodytes japonicus were examined. A total of 208 individuals were collected by RN80 Net from January to February, 2019 in the coastal waters of Gujora and Mangchi, Geoje, Korea. Range of notochord length of larval A. japonicus was 1.46~8.00 mm and fed mainly on copepods that constituted 99.9% in %IRI. The results of analysis in ontogenetic changes, divided with 3 classes (≤2 mm, 3~4 mm, ≥5 mm, Notochord length), was all classes mainly fed copepods. An opposite relationship was found between the calanoida and cyclopoida. When percentage of calanoida of copepods increased, cyclopoida of copepods decreased.

거제시 구조라 및 망치 연안에서 우점하여 출현한 까나리(Ammodytes japonicus) 자어는 조사기간인 2019년 1월과 2월 동안 총 208개체가 채집되었고 척생장의 범위는 1.46~8.00 mm였다. 까나리 자어의 주먹이생물은 요각류가 가장 우점하였고, 그 중 긴노요각목 요각류를 가장 많이 섭식하였으며, 검물벼룩목 요각류를 그 다음으로 많이 섭식하였다. 요각류 외에도 어류 난, 패충류, 갑각류 유생도 섭식하였으나 그 양은 많지 않았다. 까나리 자어의 성장에 따른 먹이생물 변화양상을 알아보기 위해 3개의 크기군으로 나누어 분석한 결과(≤2 mm, 3~4 mm, ≥5 mm, Notochord length), 성장함에 따라 긴 노요각목 요각류의 섭식비율은 점차 증가하고 검물벼룩목 요각류는 감소하였으며, 평균 먹이생물의 개체수와 부피 모두 증가하는 경향이 나타났다.

Keywords

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