Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Diet Composition of Coilia nasus in the Coastal Waters off Gori, Korea

고리 주변해역에서 출현하는 웅어 (Coilia nasus)의 위내용물 조성

  • Baeck, Gun-Wook (Department of Marine Biology & Aquaculture/Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • Park, Joo-Myun (Division of Marine Technology, Chonnam National University) ;
  • Choo, Hyun-Gi (Korea Ocean & Fisheries Institute) ;
  • Huh, Sung-Hoi (Department of Oceanography, Pukyong National University)
  • 백근욱 (경상대학교 해양생명과학과/해양산업연구소) ;
  • 박주면 (전남대학교 해양기술학부) ;
  • 추현기 (한국해양수산기술연구소) ;
  • 허성회 (부경대학교 해양학과)
  • Received : 2011.05.18
  • Accepted : 2011.06.25
  • Published : 2011.06.30
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Abstract

The feeding habits of Coilia nasus were studied using 107 specimens collected from January to December 2005 in the coastal waters off Gori, Korea. The size of C. nasus ranged from 8.4 to 29.5 cm in standard length (SL). C. nasus was a carnivore that mainly consumed shrimps and copepods. Its diet also included small quantities of amphipods, euphausiids and chaetognaths. The feeding strategy graphical method reveled than C. nasus was specialized feeder and showed narrow niche width. Both small and large size class of C. nasus mainly consumed shrimps and copepods, and did not showed significant size-related changes in feeding habits. However, the mean number and weight of preys per stomach was higher than large size class than small size class.

2005년 1월에서 12월까지 고려 주변 해역에서 채집된 웅어(Coilia nasus) 107개체의 식성을 조사하였다. 웅어의 표준체장(SL)은 8.4~29.5 cm 범위였다. 웅어의 위내용물을 분석한 결과 웅어는 새우류(Macrura)와 요각류(Copepoda)를 주로 섭식하는 육식(canivore)어류였다. 단각류(Amphipoda), 난바다곤쟁이류(Euphausiacea), 화살벌레류(Chaetognatha)도 섭식하였으나 그 양은 많이 않았다. 웅어의 섭식전략에 대한 도해적방법은 웅어가 섭식특화종(specialist predator)임을 보여주었다. 웅어는 작은 체장군과 큰 체장군에서 모두 새우류와 요각류를 주로 섭식하여 체장군과 위내용물 조성에서 유의한 차이를 보이지 않았다. 그러나 개체당 섭식한 평균 먹이개체수와 건조중량은 큰 체장군에서 더 높았다.

Keywords

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