en Ecology Ecology كاربردي Orginal research papers <div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:120%"><span style="font-family:Calibri,sans-serif"><span lang="TR" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""><span style="color:black">The juvenile</span></span></span></span> <i><span lang="TR" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""><span style="color:black">Oplegnathus fasciatus</span></span></span></span></i><span lang="TR" style="font-size:12.0pt"><span style="line-height:120%"><span new="" roman="" style="font-family:" times=""><span style="color:black"> were collected off the Gijang, Korea coast. A total of 203 juvenile<i> O. fasciatus</i> were examined, and the range of total length (TL) was 7.9-31.0 mm. The most important prey component of <i>O. fasciatus</i> was Copepods, with 75.0% in IRI (index of relative importance) index. Among Copepods, <i>Paracalanus parvus</i> s.l. in the Calanoida was the most significant dietary component. Cladocera was the second important prey component. Pisces, Amphipoda, Decapoda, and the other preys accounted for less than 1.8% of the diet by IRI index. The feeding strategy showed that <i>O. fasciatus</i> held a specialist niche with a considerable individual specialization. The result of analysis in ontogenetic changes was significantly exhibited among size classes. The proportion of Copepods decreased as increasing in body size, whereas the consumption of Cladocera, Pisces, Amphipoda, and Decapoda increased gradually. As body size increased, both the mean numbers of prey per gut (mN/Gut) and the mean volume of prey per gut (mV/Gut) constantly increased. </span></span></span></span></span></span></span></div> Parrotfish, Oplegnathus fasciatus, Feeding habits, Juvenile fish, Juvenile feeding 1 12 http://jifro.ir/browse.php?a_code=A-10-4524-2&slc_lang=en&sid=1 D.Y. Kang decade8899@naver.com 100319475328460047100 100319475328460047100 No Gyeongsang National University G.Ch. Seong sgc0720@naver.com 100319475328460047101 100319475328460047101 No Gyeongsang National University D.G. Kim ghdl4546@naver.com 100319475328460047102 100319475328460047102 No Gyeongsang National University S. Jin sss6170@naver.com 100319475328460047103 100319475328460047103 No Gyeongsang National University Y.J. Shin syj5354@fira.or.kr 100319475328460047104 100319475328460047104 No Korea Fisheries Resources Agency G.W. Baeck gwbaeck@gnu.ac.kr 100319475328460047105 100319475328460047105 Yes Gyeongsang National University