Mar-Silva, A.F., P., Díaz-Jaimes, M., Ochoa-Zavala, S., Ortega-García, G., Sotil, A., Alegre, T., Escarabay, E., Elias & J.M., Carvajal-Rodríguez (2024). A genomic approach for the identification of population management units for the dolphinfish (Coryphaena hippurus) in the eastern Pacific. Frontiers in Marine Science. 10: 1294509. DOI: 10.3389/fmars.2023.1294509.
Adán Fernando Mar-Silva 1, Píndaro Díaz-Jaimes 1, Maried Ochoa-Zavala 2, Sofía Ortega-García 3, Giovanna Sotil 4, Ana Alegre 4, Teddy Escarabay 5, Esteban Elias 6 y José Miguel Carvajal-Rodríguez 7
Thepopulation genetic structure of the dolphinfish Corypahena hippurus inthe eastern Pacific was investigated to identify possible management units for conservationpurposes based on two SNPs datasets of 3867 and 3220 SNPs for young of the year (YOY) and adult individuals,respectively, obtained through NGS protocols. Sampling covered the species’range distribution in the Tropical Eastern Pacific and was structured into YOYand adult individuals in order to discard the effects of migrating individualsinto sampled locations. Our results imply slight but significant differencesamong locations occupying the latitudinal limits of the species distribution attransitional areas between tropical and subtropical waters. These areas arecharacterized by strong seasonal variations in sea surface temperature andlimit the prevalence of populations in these extremes. Genetic differences alsoseem to be related to spatial separation of locations, therefore the northernmost(Los Cabos) and southernmost (Peru) locations including a set of oceanicsamples, showed the highest levels of genetic differentiation. Whereas weredetected barriers to gene flow among spatially separated locations for YOYindividuals probably related to site fidelity, manifest limitations to geneflow between Mexico and Central America locations were observed clearly relatedto oceanic circulation in the area. Design management strategies in countries wherethe dolphinfish is explored is of primary interest to preserve geneticresources. Therefore, is necessary the correct genetic population delimitationfor species that are highly dependent on environmental factors that determineits distributional range as is the case of the dolphinfish.
Palabras clave: Dolphinfish; genomic; population; Eastern Pacific; management units; 3RAD; SNPs
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