Consulta: creatorFacets:"Amande, Monin Justin"
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Data/hora: 12/06/2024 15:33:13

Seasonal habitat and length influence on the trophic niche of co-occurring tropical tunas in the eastern Atlantic Ocean
Provedor de dados: 5
Autores: Sardenne, Fany; Diaha, N'Guessan Constance; Amande, Monin Justin; Zudaire, Iker; Couturier, Lydie; Metral, Luisa; Le Grand, Fabienne; Bodin, Nathalie.
In the Gulf of Guinea, bigeye Thunnus obesus (BET) and yellowfin tuna Thunnus albacares (YFT) are important for commercial fisheries and play a prominent ecological role as top predators. Using fatty acid profiles and carbon and nitrogen stable isotopes we examined their niche partitioning in this understudied region. Niche overlap was high (&gt;70%), similar to percentages in other ocean basins. BET occupied a higher trophic position than YFT and fed on deeper prey (high δ15N values and high proportions of mono-unsaturated fatty acids). The trophic position of YFT decreased slightly in the last 15 years (δ15N values decrease ~0.5 ‰) suggesting a change in epipelagic communities, as observed in the eastern Pacific Ocean. Ontogenic changes were limited to...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00436/54796/56254.pdf