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Resumen del producto

Briones-Hernández, S.A., U., Jakes-Cota, F.R., Elorriaga-Verplancken, F., Galván-Magaña, J.M., Logan, J., O’Sullivan, J.M., Carvajal-Rodríguez, E., Elias, J., Alfaro-Shigueto & S., Ortega-García (2023). Movement and population dispersal of dolphinfish (Coryphaena hippurus) across the Eastern Tropical Pacific inferred from carbon and nitrogen stable isotope analyses. Journal of Fish Biology. 103(3): 544-556. DOI: 10.1111/jfb.15456.

Movement and population dispersal of dolphinfish (Coryphaena hippurus) across the Eastern Tropical Pacific inferred from carbon and nitrogen stable isotope analyses

Sergio Alejandro Briones-Hernández 1, Ulianov Jakes-Cota 1, Fernando R. Elorriaga-Verplancken 1, Felipe Galván-Magaña 1, John M. Logan 2, John O’Sullivan 3, José Miguel Carvajal-Rodríguez 4, Esteban Elias 5, Joanna Alfaro-Shigueto 6 y Sofía Ortega-García 1

1 Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas
2 Massachusetts Division of Marine Fisheries
3 Monterey Bay Aquarium
4 Instituto Costarricense de Pesca y Acuicultura, Puntarenas
5 Instituto Público de Investigación de Acuicultura y Pesca
6 Universidad Científica del Perú
The dolphinfish (Coryphaena hippurus) is a globally distributed marine predator thatsupports one of the most important coastal fisheries along the Eastern Tropical Pacific(ETP), but its spatial movements in this area are poorly understood. Stable isotopevalues (d13C and d15N) of white muscle from dolphinfish (n = 220) captured at differentlocations across the ETP (i.e., Mexico, Costa Rica, Ecuador, Peru and oceanic areas)were normalized to copepod baseline stable isotope values to estimate dolphinfish trophicposition, movements and population dispersal. Movement or residence patternswere inferred from the difference in d15N values (?15Ndolphinfish-copepod‰)between copepods and dolphinfish muscle. Baseline corrected isotope values(d13Cdolphinfish-copepod and d15Ndolphinfish-copepod) of dolphinfish muscle were used to estimateisotopic niche metrics and infer population dispersal across isoscapes. Values ofd13C and d15N differed between juvenile and adult dolphinfish and across the ETP.Trophic position estimates ranged from 3.1 to 6.0 with a mean of 4.6. Adults and juvenileshad similar trophic position estimates, whereas isotopic niche areas (SEA ‰2) ofadults were greater relative to juveniles in every location. Adult dolphinfishshowed “moderate movement by some individuals” in all locations based on?15Ndolphinfish-copepod values, except for Costa Rica where adults were classified with“high degree of movement by some individuals” whereas juveniles showed“limited movement” in all areas except Mexico. Population dispersal based on?15Ndolphinfish-copepod values showed “moderate” and “high” dispersal for adults and“no dispersal” for most juveniles, except for Mexico. This study provides insight intopotential dolphinfish spatial mobility across an area of interest for multiple nations,

which can help to improve stock assessments and management of the species.

Palabras clave: fisheries; isoscapes; isotopic niche; pelagic predators

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