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Martín-del-Campo, R., C.D., Ortega-Ortiz, A., Abreu-Grobois, L.M., Enríquez-Paredes, D., Petatán-Ramírez, A., García-Gasca & S.I., Quijano-Scheggia (2023). Genetic evidence for Indo-Western Pacific olive ridley sea turtles in mexican waters. Diversity. 15(3): 430. DOI: 10.3390/d15030430.

Genetic evidence for Indo-Western Pacific olive ridley sea turtles in mexican waters

Rodolfo Martín-del-Campo 1, Christian D. Ortega-Ortiz 1, Alberto Abreu-Grobois 2, Luis M. Enríquez-Paredes 3, David Petatán-Ramírez 4, Alejandra García-Gasca 5 y Sonia I. Quijano-Scheggia 6

1 Facultad de Ciencias Marinas, Universidad de Colima, Campus El Naranjo, Manzanillo, Colima Mexico
2 Laboratorio de Genética, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mazatlan, Sinaloa, Mexico
3 Laboratorio de Ecología Molecular, Facultad de Ciencias Marinas, Universidad Autónoma de Baja California, Ensenada,Baja California, Mexico
4 Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Departamento de Oceanología
5 Laboratorio de Biología Molecular, Centro de Investigación en Alimentación y Desarrollo, Mazatlan, Sinaloa, Mexico
6 Centro Universitario de Investigaciones Oceanológicas, Universidad de Colima, Campus El Naranjo, Manzanillo, Colima, Mexico
The olive ridley sea turtle is predominantly an epipelagic species with no apparent migration corridors. Research in feeding areas in other sea turtle species has identified aggregations of individuals from diverse backgrounds; however, no specific feeding areas have been identified for the olive ridley. We used mtDNA control region sequencing to identify the haplotype composition of 85 olive ridley turtles (adult and immature turtles from both sexes) captured and released in Central Mexican Pacific waters. Amplified fragments of the control region (751 bp) revealed the presence of 17 haplotypes (h = 0.5877 ± 0.0622 and p = 0.001698 ± 0.001185), and 16 of them were phylogenetically grouped within the lineage of the Eastern Pacific, but the haplotype Lo37 showed close evolutionary relationships with the lineage of the East Coast of India. Lagrangian drifter data showed that West–East transport from the Indo-Pacific to the tropical Eastern Pacific might be possible through passive drift. These results highlight the importance of more genetic studies offshore and the role of the ocean currents in the migratory behavior of olive ridleys, as well as the need to establish multinational strategies for the conservation and management of the species in international waters.

Palabras clave: Eastern Tropical Pacific; endangered species; Genetic diversity; Lagragian drifters; Lepidochelys olivácea; mtDNA; ocean currents; olive ridley turtle long-distance migrations

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