Resource Use among Six Commercial Fish Species from the South-Eastern Gill Net Fisheries, Korea
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Title
- Resource Use among Six Commercial Fish Species from the South-Eastern Gill Net Fisheries, Korea
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Author(s)
- Kang, Mingu; Lee, Sang-Heon; Kim, Myung-Joon; Kwak, Seok-Nam; Han, In-Seong; Park, Joo Myun
- KIOST Author(s)
- Kang, Mingu(강민구); Park, Joo Myun(박주면)
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Alternative Author(s)
- 강민구; 박주면
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Publication Year
- 2023-03
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Abstract
- Dietary habits and inter-specific differences in resource use among six commercial fish species, Chelidonichthys spinosus, Cleisthenes pinetorum, Glyptocephalus stelleri, Hexagrammos otakii, Lophius litulon, and Sebastes schlegelii, collected from the southern coast of the East Sea, Korea, were analyzed using stomach content and stable isotope analyses. Teleosts were the main prey items for C. pinetorum and L. litulon, while both crabs and teleosts contributed to the diets of C. spinosus and S. schlegelii. Glyptocephalus stelleri mainly consumed polycheates and carid shrimps, and H. otakii mostly ingested crabs. The composition of prey items was significantly different in the diets of the six fish species. Further, carbon (δ13C) and nitrogen (δ15N) stable isotope values were significantly different among the six species, indicating different trophic positions. L. litulon, C. pinetorum, and S. schlegelii had narrow niches, whereas C. spinosus, G. stelleri, and H. otakii had relatively wider niches. This study demonstrated differences in patterns of food resource use among the six fish species that were categorized into two patterns of resource use according to their main prey items: diet diversity, trophic niche width, and trophic position. These results could contribute to the understanding of trophic relationships among fish species inhabiting the East Sea, Korea.
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ISSN
- 2073-4441
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/44014
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DOI
- 10.3390/w15061146
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Bibliographic Citation
- Water (Switzerland), v.15, no.6, 2023
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Publisher
- Multidisciplinary Digital Publishing Institute (MDPI)
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Keywords
- demersal fish; stomach contents; stable isotopes; diet diversity; trophic niche; East Sea
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Type
- Article
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Language
- English
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Document Type
- Article
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