Summary
This study integrated morphological and metagenetic methods to characterise the diet and feeding habits of larval Pacific bluefin tuna (Thunnus orientalis) collected from the Sea of Japan across five summer seasons (2011–2015). By combining microscopic examination of 149 larvae with metagenetic analysis of 120 specimens, the authors identified prey species consumed and quantified feeding patterns, providing ecological baseline data relevant to understanding recruitment success and early-life survival in this commercially significant species.
UK applicability
This research is specific to Pacific bluefin tuna ecology in Japanese waters and has limited direct applicability to UK aquaculture or fisheries policy. However, the methodological approach of integrating morphological and molecular diet analysis may inform best practice for larval fish nutrition studies in UK research or hatchery operations.
Key measures
Prey species identification via microscopy and DNA metabarcoding; diet composition; feeding frequency; larval size and condition
Outcomes reported
The study identified prey species composition and feeding habits of larval Pacific bluefin tuna in the Sea of Japan using both morphological examination and metagenetic analysis of stomach contents. Findings characterise the diet and feeding behaviour of this commercially important species during its larval stage.
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