한국수산과학회지 (Korean Journal of Fisheries and Aquatic Sciences)
- 제32권5호
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- Pages.637-641
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- 1999
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- 0374-8111(pISSN)
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- 2287-8815(eISSN)
볼락, Sebastes inermis 의 섭식상태
Feeding Ecology of Black Rockfish, Sebastes inermis
- KIM Chong-Kwan (Biological Oceanography Division KORDI) ;
- KANG Yong-Joo (Department of Marine Biology, Pukyong National University)
- 발행 : 1999.09.01
초록
본 연구는 볼락, Sebastes inermis의 섭식생태를 파악하기 위하여 경남 사천시 신수도 연안에서 채집된 볼락의 섭식활동 주기와 위내용물을 분석하였다. 어체표본은 1984년 2월부터 1985년 5월사이에 낚시, 자망, 소형기선저인망, 낭장망 등으로서 채집하였다. 볼락의 표본은 0세군부터 4세군까지 채집되었으며, 이들의 주 섭식활동 시간대는 봄, 여름의 경우 이른 아침과 늦은 오후였고, 가을과 겨울에는 특별한 섭식활동 시간대 없이 1
This study was carried out to understand feeding ecology of black rockfish, Sebastes inermis in the coastal waters off Shinsudo, Sachon. The specimens were collected by angling, gill net, small danish seine, and long-bag net from February 1984 to May 1985. The fish consisted of 5 age groups from 0 to 4. Feeding activity was more intensive in the early morning and late afternoon in spring and summer, but the fish showed intermittent feeding activities in autumn and winter. Although the food items of the fish changed slightly by seasons and with growth of the fish, main food items were cope pods, gammarids, caprellids, carideans, polychaetes, and brachyurans. Of these food items, cope pods were major preys for the fish of age group 0, and gammarids over age group 1. Evenness and diversity of the food items increased as the fish grew. In consideration of feeding organs, digestive organs and stomach contents of the fish, S. inermis seemed to be not only carnivore but also visual feeder consuming mainly small crustaceans.