Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Feeding Habits of Belted Beard Grunt, Hapalogenys mucronatus, in the Coastal Waters off Sori Island, Yeosu, Korea

여수 소리도 주변 해역에서 채집된 군평선이(Hapalogenys mucronatus)의 식성

  • Soh, Ho Young (Division of Aquaculture Science, Yosu National University) ;
  • Kwak, Seok Nam (Korea Inter-University Institute of Ocean Science, Pukyong National University)
  • 서호영 (여수대학교 생물자원학과) ;
  • 곽석남 (부경대학교 해양과학공동연구소)
  • Received : 2005.10.03
  • Accepted : 2005.12.01
  • Published : 2005.12.31
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Abstract

Feeding habits of Hapalogenys mucronatus (10.1~22.1 cm) collected from coastal waters off Sori Island, Yeosu, from June 2003 to May 2004 were studied. H. mucronatus is a carnivore which consumes mainly caridean shrimp, crabs, polychaetes, and amphipods. Its diet includes small quantities of bivalves, cephalopods, seagrass, hermit crabs, isopods, eggs, mysids, gastropods, and copepods. H. mucronatus undergoes significant size-related changes; smaller fish (10~11.9 cm) prey mainly on amphipods, shrimps and bivalves, while the proportion of caridean shrimp increases with fish size (12~17.9 cm). The larger fishes (18~22.1 cm) eat caridean shrimps and polychaetes.

군평선이의 식성을 연구하기 위해 여수 소리도 주변 해역에서 소형 trawl을 이용하여 2003년 6월부터 2004년 5월까지 채집된 군평선이의 위내용물을 조사하였다. 군평선이의 가장 중요한 먹이생물은 새우류였으며, 그 다음으로 게류, 갯지렁이류 및 단각류순으로 중요하였다. 그 외에 이매패류, 두족류, 해초류, 집게류, 등각류, 미동정 난, 곤쟁이류, 복족류 및 요각류 등이 발견되었으나, 그 양은 많지 않았다. 군평선이는 성장함에 따라 먹이생물의 전환이 뚜렷하였다. 가장 작은 크기군인 체장 10~11.9 cm 크기군에서는 단각류의 점유율이 높았지만 체장이 증가함에 따라 단각류의 점유율은 점차 감소한 반면, 새우류의 점유율이 증가하여 12~17.9 cm 크기군에서는 가장 중요한 먹이생물이 되었다. 한편 체장 18~22.1 cm 크기군에서는 갯지렁이류의 점유율이 증가하여 새우류와 더불어 중요한 먹이생물로 나타났다. 군평선이는 성장함에 따라 먹이생물의 크기가 점차 증가하였다.

Keywords

References

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