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http://dx.doi.org/10.13047/KJEE.2017.31.5.472

Studies on the Feeding Habits of Korean aucha perch, Coreoperca herzi in the Geum River, Korea  

Byeon, Hwa-Keun (Dept. of Biology Education, Seowon Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.31, no.5, 2017 , pp. 472-478 More about this Journal
Abstract
The feeding habits of Coreoperca herzi were investigated from specimens collected in the Geum River, from March to December 2016. The specimens were separated into groups of 38~70 mm, 71~109 mm, and over 110 mm in total length. The live foods of C. herzi included Ephemeroptera, Odonata, Plecoptera, Coleoptera, Diptera, Trichoptera, and fishes. The Korean aucha perches fed mostly on aquatic insects which took up 98.8% of food regarding the number, 55.8% regarding the biomass, and 97.1% in terms of iregarding the index of relative importance. They were carnivorous in diet and predators (stalker) in food intake characteristics and forms when applying Keenleyside's classification. The main food sources of C. herzi were Ephemeroptera, Diptera, and Trichoptera while Odonata, Plecoptera, Coleoptera, and fishes were rare. A food migration was observed since less Ephemeroptera was found and more Trichoptera and fishes were found in the biomass of the feed consumed by larger species. The amount of Coleoptera and Diptera did not change much with the size of the species. The overall composition of live food was not seasonal. The result of the study indicates that, when restoring the streams to be the habitat for the natural population increase of Coreoperca herzi, the environment should be inhabitable to Ephemeroptera, Diptera, and Trichoptera which are the main foods.
Keywords
PREY; CARNIVOROUS; AQUATIC INSECT; INDEX OF RELATIVE IMPORTANCE;
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Times Cited By KSCI : 3  (Citation Analysis)
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