Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Feeding Habits of Tridentiger bifasciatus in the Tidal Creek at Sangnae-ri, Suncheon, Korea

순천 상내리 갯골에 출현하는 민물두줄망둑(Tridentiger bifasciatus)의 식성

  • Ye, Sang Jin (Department of Marine Biology & Aquaculture/Institue of Marine Industry, Gyeongsang National University) ;
  • Jeong, Jae Mook (Department of Marine Biology & Aquaculture/Institue of Marine Industry, Gyeongsang National University) ;
  • Kim, Hyeon Ji (Department of Marine Biology & Aquaculture/Institue of Marine Industry, Gyeongsang National University) ;
  • Park, Joo Myun (Korea Inter-University Institute of Ocean Sciences, Pukyong National University) ;
  • Huh, Sung-Hoi (Department of Oceanography, Pukyong National University) ;
  • Baeck, Gun Wook (Department of Marine Biology & Aquaculture/Institue of Marine Industry, Gyeongsang National University)
  • 예상진 (경상대학교 해양생명과학과/해양산업연구소) ;
  • 정재묵 (경상대학교 해양생명과학과/해양산업연구소) ;
  • 김현지 (경상대학교 해양생명과학과/해양산업연구소) ;
  • 박주면 (부경대학교 해양과학공동연구소) ;
  • 허성회 (부경대학교 해양학과) ;
  • 백근욱 (경상대학교 해양생명과학과/해양산업연구소)
  • Received : 2013.11.26
  • Accepted : 2014.02.06
  • Published : 2014.04.30
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Abstract

The feeding habits of Tridentiger bifasciatus were studied using 733 individuals collected in the tidal creek at Sangnae-ri, Suncheon, Korea, using a push net, monthly, from April 2011 to March 2012. The standard length (SL) of the specimens ranged from 1.5 to 8.2 cm. The stomach content analysis indicated that T. bifasciatus consumed mainly amphipods, such as Corophium sp., while copepods, polychaetes, and shrimps were other important prey species. In addition T. bifasciatus ate small quantities of crab larvae, fish, gastropod larvae, and insects. T. bifasciatus is a generalist that feeds on various zoobenthos, including fish. T. bifasciatus underwent an ontogenetic dietary shift. Smaller individuals (1-2 cm SL) fed mainly on amphipods. The proportion of amphipods decreased as body size increased, whereas the consumption of polychaetes increased gradually. The seasonal variation in the diet composition of T. bifasciatus was significant. Insects were common prey during summer, while the amounts of other prey, including polychaetes, were similar during spring, autumn, and winter.

Keywords

References

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