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Lack of genetic differentiation in yellowfin tuna has conservation implications in the Eastern Pacific Ocean

Author

Listed:
  • Laia Muñoz-Abril
  • Maria de Lourdes Torres
  • Carlos A Valle
  • Francisco Rubianes-Landázuri
  • Felipe Galván-Magaña
  • Steven W J Canty
  • Martin A Terán
  • Margarita Brandt
  • Jaime A Chaves
  • Peter M Grewe

Abstract

Yellowfin tuna, Thunnus albacares, is an important global fishery and of particular importance in the Eastern Pacific Ocean (EPO). According to the 2019 Inter-American Tropical Tuna Commission (IATTC) assessment, yellowfin tuna within the EPO is a single stock, and is being managed as one stock. However, previous studies indicate site fidelity, or limited home ranges, of yellowfin tuna which suggests the potential for multiple yellowfin tuna stocks within the EPO, which was supported by a population genetic study using microsatellites. If numerous stocks are present, management at the wrong spatial scales could cause the loss of minor yellowfin tuna populations in the EPO. In this study we used double digestion RADseq to assess the genetic structure of yellowfin tuna in the EPO. A total of 164 yellowfin tuna from Cabo San Lucas, México, and the Galápagos Islands and Santa Elena, Ecuador, were analysed using 18,011 single nucleotide polymorphisms. Limited genetic differentiation (FST = 0.00058–0.00328) observed among the sampling locations (México, Ecuador, Peru, and within Ecuador) is consistent with presence of a single yellowfin tuna population within the EPO. Our findings are consistent with the IATTC assessment and provide further evidence of the need for transboundary cooperation for the successful management of this important fishery throughout the EPO.

Suggested Citation

  • Laia Muñoz-Abril & Maria de Lourdes Torres & Carlos A Valle & Francisco Rubianes-Landázuri & Felipe Galván-Magaña & Steven W J Canty & Martin A Terán & Margarita Brandt & Jaime A Chaves & Peter M Grew, 2022. "Lack of genetic differentiation in yellowfin tuna has conservation implications in the Eastern Pacific Ocean," PLOS ONE, Public Library of Science, vol. 17(8), pages 1-14, August.
    • Handle: RePEc:plo:pone00:0272713
    DOI: 10.1371/journal.pone.0272713
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    References listed on IDEAS

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    1. Sibert, John & Hampton, John, 2003. "Mobility of tropical tunas and the implications for fisheries management," Marine Policy, Elsevier, vol. 27(1), pages 87-95, January.
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