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Abstract <p>The diets of <i>Trichiurus japonicus</i>, <i>Scomber japonicus</i>, and <i>Trachurus japonicus</i> collected from the Korea Strait were compared based on the analysis of stomach contents. A total of 145 <i>Tri. japonicus</i>, 144 <i>S.&#xa0;japonicus</i>, and 122 <i>Tra. japonicus</i> individuals analyzed in this study were collected during multiple cruises using gill nets, trawl nets, purse seine nets, and longlines. In terms of individual size, the <i>Tri. japonicus</i> specimens had anal lengths of 10.2–31.2 cm, <i>S. japonicus</i> had total lengths (<i>TL</i>) of 18.4–45.2 cm, and <i>Tra. japonicus</i> had <i>TL</i> of 14.5–35.6 cm. Based on the index of relative importance %<i>IRI</i> and size-related variation in diet composition, <i>Tri. japonicus</i>, <i>S. japonicus</i>, and <i>Tra. japonicus</i> were shown to feed mainly on euphausiids and fishes, euphausiids only, and fishes only, respectively. The trophic levels of the three species were 3.84 ± 0.63, 3.35 ± 0.47, and 3.96 ± 0.69, respectively. These results suggest that the observed interspecific dietary differences are influenced by the ecological niche width and life history strategy of each species.</p>

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Feeding Strategies and Trophic Levels of Trichiurus japonicus (Trichiuridae), Scomber japonicus (Scombridae), and Trachurus japonicus (Carangidae) in the Korea Strait

  • 期刊论文

  • 发表日期：

    2026年4月20日

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  • D. J. Kim,
  • J. I. Cho,
  • J. Y. Son,
  • M. S. Kim,
  • M. S. Kang,
  • Y. B. Yu,
  • Y. H. Choi,
  • D. G. Kim,
  • H. Y. Soh,
  • G. W. Baeck

摘要

Abstract

The diets of Trichiurus japonicus, Scomber japonicus, and Trachurus japonicus collected from the Korea Strait were compared based on the analysis of stomach contents. A total of 145 Tri. japonicus, 144 S. japonicus, and 122 Tra. japonicus individuals analyzed in this study were collected during multiple cruises using gill nets, trawl nets, purse seine nets, and longlines. In terms of individual size, the Tri. japonicus specimens had anal lengths of 10.2–31.2 cm, S. japonicus had total lengths (TL) of 18.4–45.2 cm, and Tra. japonicus had TL of 14.5–35.6 cm. Based on the index of relative importance %IRI and size-related variation in diet composition, Tri. japonicus, S. japonicus, and Tra. japonicus were shown to feed mainly on euphausiids and fishes, euphausiids only, and fishes only, respectively. The trophic levels of the three species were 3.84 ± 0.63, 3.35 ± 0.47, and 3.96 ± 0.69, respectively. These results suggest that the observed interspecific dietary differences are influenced by the ecological niche width and life history strategy of each species.