Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic

Research around Fernando de Noronha Archipelago reveals that four pelagic predatory fish—yellowfin tuna, wahoo, barracuda, and dolphinfish—exhibit specialized yet distinct feeding strategies, minimizing competition through low trophic niche overlap. Stable isotope analysis confirmed their coexistence by targeting different prey, despite their generalist/opportunistic diets. Yellowfin tuna displayed the highest dietary diversity, while barracuda and wahoo showed notable overlap (R0 = 0.72). The study highlights the archipelago's role in supporting diverse trophic interactions among these key predators.

Martins, K., Pelage, L., Justino, A. K. S., Frédou, F. L., Júnior, T. V., Le Loc’h, F., & Travassos, P. (2021). Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic. Journal of Fish Biology, 99(5), 1576–1590. Portico. https://doi.org/10.1111/jfb.14863