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The genomic footprint of whaling and isolation in fin whale populations

Author

Listed:
  • Sergio F. Nigenda-Morales

    (Center for Research and Advanced Studies (Cinvestav), Irapuato
    California State University San Marcos)

  • Meixi Lin

    (University of California, Los Angeles
    Carnegie Institution for Science)

  • Paulina G. Nuñez-Valencia

    (Center for Research and Advanced Studies (Cinvestav), Irapuato
    Universidad Nacional Autónoma de México (UNAM), Cuernavaca)

  • Christopher C. Kyriazis

    (University of California, Los Angeles)

  • Annabel C. Beichman

    (University of Washington)

  • Jacqueline A. Robinson

    (University of California, San Francisco (UCSF))

  • Aaron P. Ragsdale

    (Center for Research and Advanced Studies (Cinvestav), Irapuato
    University of Wisconsin)

  • Jorge Urbán R.

    (Universidad Autónoma de Baja California Sur (UABCS))

  • Frederick I. Archer

    (Southwest Fisheries Science Center)

  • Lorena Viloria-Gómora

    (Universidad Autónoma de Baja California Sur (UABCS))

  • María José Pérez-Álvarez

    (Facultad de Medicina y Ciencias de la Salud, Universidad Mayor
    Universidad de Chile)

  • Elie Poulin

    (Universidad de Chile)

  • Kirk E. Lohmueller

    (University of California, Los Angeles
    University of California
    University of California)

  • Andrés Moreno-Estrada

    (Center for Research and Advanced Studies (Cinvestav), Irapuato)

  • Robert K. Wayne

    (University of California, Los Angeles)

Abstract

Twentieth century industrial whaling pushed several species to the brink of extinction, with fin whales being the most impacted. However, a small, resident population in the Gulf of California was not targeted by whaling. Here, we analyzed 50 whole-genomes from the Eastern North Pacific (ENP) and Gulf of California (GOC) fin whale populations to investigate their demographic history and the genomic effects of natural and human-induced bottlenecks. We show that the two populations diverged ~16,000 years ago, after which the ENP population expanded and then suffered a 99% reduction in effective size during the whaling period. In contrast, the GOC population remained small and isolated, receiving less than one migrant per generation. However, this low level of migration has been crucial for maintaining its viability. Our study exposes the severity of whaling, emphasizes the importance of migration, and demonstrates the use of genome-based analyses and simulations to inform conservation strategies.

Suggested Citation

  • Sergio F. Nigenda-Morales & Meixi Lin & Paulina G. Nuñez-Valencia & Christopher C. Kyriazis & Annabel C. Beichman & Jacqueline A. Robinson & Aaron P. Ragsdale & Jorge Urbán R. & Frederick I. Archer & , 2023. "The genomic footprint of whaling and isolation in fin whale populations," Nature Communications, Nature, vol. 14(1), pages 1-18, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40052-z
    DOI: 10.1038/s41467-023-40052-z
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    References listed on IDEAS

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