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July 10, 2026Scientific ReportsOpen Access

Stable isotope insights into the feeding ecology of common dolphin (Delphinus delphis) in the East Sea of Korea

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Authors

DSDonghoon ShinMKMyung Joon KimDKDongyoung Kim

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Overview

Investigating feeding ecology reveals dolphins' dietary habits and ecological roles in changing marine environments.

Key Points

  • This research aims to understand the feeding ecology and trophic interactions of common dolphins in the East Sea of Korea.
  • Stable isotope analysis of carbon and nitrogen from dolphin and prey muscle samples collected from 2020 to 2023.
  • Isotopic niche analyses and Bayesian mixing models were utilized to assess dietary contributions of prey species.
  • Dolphins showed significant utilization of mid-shelf pelagic habitats with δ 13 C values ranging from −18.5‰ to −17.9‰.
  • Isotopic shifts in δ 15 N values (12.3‰–13.1‰) indicated seasonal variations in prey trophic levels, with Pacific herring contributing up to 56% in summer.
  • Broader trophic flexibility was observed in winter–fall and narrower niches in summer, suggesting opportunistic feeding behavior.

Cite This Study

Shin et al. (2026) studied this question.

synapsesocial.com/papers/6a508ea56eeac72a437a1616https://doi.org/10.1038/s41598-026-61036-1
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Also Consider

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