{
  "abstract": "Lepidochelys olivacea is the most abundant sea turtle species worldwide and exhibits a circumtropical distribution across the Atlantic, Pacific, and Indian Oceans. Global phylogeographic studies have identified three major mitochondrial lineages, but comparisons among regions remain limited by inconsistent mtDNA control-region fragment lengths, incompatible haplotype nomenclatures, and uneven geographic sampling. The East Pacific Regional Management Unit (RMU), which includes major nesting populations in Mexico and Costa Rica, experienced severe demographic declines during the twentieth century, and the effects of expanded sampling on current phylogeographic patterns remain uncertain. This study analyzed 1264 mtDNA control region sequences (474-bp and 653-bp fragments) to update and standardize the global genetic dataset of L. olivacea, incorporating novel samples from previously unsampled East Pacific localities. Clear phylogeographic differentiation among RMUs was detected and remained consistent across both sequence lengths, supporting the Atlantic (ATL), East Pacific (EP), and Indo-West Pacific (IWP) lineages. Shared haplotypes between the EP and IWP lineages likely reflect historical connectivity rather than contemporary transoceanic movements. The 653-bp dataset revealed greater haplotype diversity (78 haplotypes) than the 474-bp dataset (62 haplotypes), highlighting the improved resolution provided by the longer marker. Regional diversity patterns appeared to be influenced by sampling effort, particularly in underrepresented regions such as the West Indian Ocean. Negative neutrality indices in both Pacific RMUs suggested recent population expansion. This study establishes a standardized haplotype nomenclature for L. olivacea, provides an updated view of mitochondrial lineage distributions, and offers a robust framework for future phylogeographic and conservation studies across the species' range.",
  "abstract_shown": true,
  "affiliations": [
    "Laboratory of Conservation Medicine, Centro de Biotecnología Genómica, Instituto Politécnico Nacional, Reynosa 88700, Tamaulipas, Mexico.",
    "UAM Reynosa-Aztlan, Universidad Autónoma de Tamaulipas, Reynosa 88740, Tamaulipas, Mexico.",
    "Laboratório de Genética e Evolução Molecular, Universidade Federal do Espírito Santo, Vitória 29075-910, Brazil.",
    "Departamento Académico de Ciencias Marinas y Costeras, Universidad Autónoma de Baja California Sur (UABCS), La Paz 23080, Baja California Sur, Mexico.",
    "Instituto Politécnico Nacional (IPN-CIIDIR Sinaloa), Guasave 81049, Sinaloa, Mexico.",
    "Laboratorio de Biotecnología Industrial, Centro de Biotecnología Genómica, Instituto Politécnico Nacional, Reynosa 88740, Tamaulipas, Mexico.",
    "Estación Biológica Majahuas, Playón de Mismaloya, Tomatlán 48400, Jalisco, Mexico.",
    "Grupo Tortuguero de las Californias A.C., La Paz 23090, Baja California Sur, Mexico.",
    "Uella Environmental Research and Consulting, Bahía de Banderas 63732, Nayarit, Mexico.",
    "Centro de Promoción Ambiental, Museo Regional Comunitario de la Tortuga Marina, Ejido Emiliano Zapata, Mazatán 30655, Chiapas, Mexico.",
    "Instituto de Biociencias, Universidad Autónoma de Chiapas, Tapachula 30798, Chiapas, Mexico."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 13,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Omar Horacio Sol-Torres",
      "orcid": "0009-0009-6582-5664"
    },
    {
      "affs": [
        0
      ],
      "name": "Hugo David Gallardo-Sánchez",
      "orcid": "0009-0000-6956-3619"
    },
    {
      "affs": [
        1
      ],
      "name": "Fátima Yedith Camacho-Sánchez"
    },
    {
      "affs": [
        2
      ],
      "name": "Sarah Maria Vargas"
    },
    {
      "affs": [
        3
      ],
      "name": "Eduardo Resendiz",
      "orcid": "0000-0002-5219-5511"
    },
    {
      "affs": [
        4
      ],
      "name": "Alan A Zavala-Norzagaray",
      "orcid": "0000-0003-4380-9056"
    },
    {
      "affs": [
        5
      ],
      "name": "José Alberto Narváez-Zapata",
      "orcid": "0000-0003-0577-9546"
    },
    {
      "affs": [
        4,
        6,
        7
      ],
      "name": "Luis A Tello-Sahagún",
      "orcid": "0000-0002-1605-8384"
    },
    {
      "affs": [
        4,
        7,
        8
      ],
      "name": "Catherine E Hart",
      "orcid": "0000-0002-0833-2523"
    },
    {
      "affs": [
        9
      ],
      "name": "José Alfredo González-Gerardo"
    },
    {
      "affs": [
        10
      ],
      "name": "Raymundo Rosas-Quijano",
      "orcid": "0000-0002-5769-8775"
    },
    {
      "affs": [
        10
      ],
      "name": "Didiana Gálvez-López",
      "orcid": "0000-0003-2206-9108"
    },
    {
      "affs": [
        0
      ],
      "name": "Miguel Angel Reyes-López",
      "orcid": "0000-0001-9939-3032"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/enn2tvq97rx5r.bib",
  "cited_by": 0,
  "doi": "10.3390/ani16193021",
  "fulltext_url": "https://europepmc.org/articles/PMC13663389",
  "id": "enn2tvq97rx5r",
  "issns": [
    "2076-2615"
  ],
  "landing_url": "https://europepmc.org/article/MED/42882990",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2309|Turtle Biology and Conservation"
    ]
  ],
  "openalex": "W7214341682",
  "pdf_url": "https://europepmc.org/articles/PMC13663389?pdf=render",
  "pmcid": "PMC13663389",
  "pmid": "42882990",
  "published": "2026-09-25",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/enn2tvq97rx5r.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:16Z",
      "native_id": "MED:42882990",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42882990"
    }
  ],
  "subjects": [
    {
      "field": "biology",
      "origin": "openalex:2309|Turtle Biology and Conservation",
      "subfield": "ecology"
    }
  ],
  "title": "Phylogeography of the Olive Ridley Sea Turtle (Lepidochelys olivacea): Standardized Global Haplotype Nomenclature and Updated Mitochondrial Lineage Distributions in the Eastern Pacific.",
  "title_text": "Phylogeography of the Olive Ridley Sea Turtle (Lepidochelys olivacea): Standardized Global Haplotype Nomenclature and Updated Mitochondrial Lineage Distributions in the Eastern Pacific.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:16Z",
  "url": "https://research.draconitic.com/paper/enn2tvq97rx5r",
  "venue": "Animals : an open access journal from MDPI",
  "versions": []
}