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여수 금오도 주변해역에 출현하는 전갱이 (Trachurus japonicus) 유어의 위내용물 조성
김희용 ( Heeyong Kim ),임유나 ( Yu Na Lim ),정재묵 ( Jae Mook Jeong ),김현지 ( Hyeon Ji Kim ),백근욱 ( Gun Wook Baeck ) 한국어업기술학회 2015 수산해양기술연구 Vol.51 No.4
The diet composition of juvenile Trachurus japonicus were studied using 195 specimens collected from 2013 (May, June, July, and September) to 2014 (May, June, and July) in the coastal waters of Geumodo, Yeosu, Korea. The size of juvenile T. japonicus ranged from 4.3 to 15.2 cm in body length (BL). Juvenile T. japonicus was carnivorous and crustaceans predators that consumes mainly consumed copepods. Its diet also included small quantities of decapods, cirripedians, nematods, chaetognathans, fishes, amphipods, cumaceans, ostracods and euphausiids. The graphical method for feeding strategy revealed that juvenile T. japonicus is an opportunistic and specialized predator on copepods, especially Corycaeus. affinis, and showed narrow niche width. Juvenile T. japonicus showed ontogenetic diet change. Small size group individuals (4.3-8.0 cm BL) mainly consumed copepods. The portion of this prey item decreased in the large size group (8.0-15.2 cm BL), and this decrease was paralleled with increased consumption of decapods.