Korean Journal of Ichthyology (한국어류학회지)
- Volume 10 Issue 1
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- Pages.24-31
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- 1998
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- 1225-8598(pISSN)
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- 2288-3371(eISSN)
Feeding Habits of Acentrogobius pflaumii in the Eelgrass(Zostera marina) Bed in Kwangyang Bay
광양만 잘피밭에 서식하는 줄망둑(Acentrogobius pflaumii)의 식성
- Huh, Sung-Hoi (Department of Oceanography and Korea Inter-University Institute of Ocean Science, Pukyong National University) ;
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Kwak, Seok-Nam
(Department of Oceanography and Korea Inter-University Institute of Ocean Science, Pukyong National University)
- Published : 1998.06.30
Abstract
Feeding habits of Acentrogobius pflaumii collected from the eelgrass bed in Kwangyang Bay from January 1994 to December 1994 were studied. Acentrogobius pflaumii was a carnivore which consumed mainly gammarid amphipods, polychaetes and gastropods. Its diets included minor quantities of cope pods, tanaids and crabs. It showed ontogenetic changes in feeding habits. Individuals of 1~2cm SL preyed heavily on gammarid amphipods. However, polychaetes and gastropods were selected with increasing fish size. Although gammarid amphipods, polychaetes, and gastropods were major prey organisms for all seasons, the relative proportion of these food items changed with season. Consumption of gammarid amphipods and polychaetes was relatively high in summer, and consumption of gastropods was relatively high in winter.
1994년 1월부터 1994년 12월까지 광양만 대도주변 잘피밭에서 채집된 줄망둑의 식성을 조사하였다. 줄망둑의 주요 먹이생물은 단각류(특히 옆새우류), 갯지렁이류 및 복족류였으며, 그 외 요각류, 주걱벌레붙이류, 게류, 이매패류 등이 소량씩 위내용물 중 발견되었다. 줄망둑이 성장함에 따라 먹이생물의 조성이 점차 변하였다. 체장이 작은(1~2cm SL) 줄망둑은 옆새우류를 주로 먹었으나, 처장이 증가하면서 옆새우류가 위내용물 중 차지하는 비율은 점차 낮아진 반면, 갯지렁이류 및 복족류가 차지하는 비율은 증가하였다. 계절에 따라 먹이생물 조성이 다소 변했는데, 여름에는 옆새우류와 갯지렁이류가, 그리고 겨울에는 복족류가 차지하는 비율이 다른 계절에 비해 높았다.