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Genetic Sex and Origin Identification Suggests Differential Migration of Male and Female Atlantic Bluefin Tuna (Thunnus thynnus) in the Northeast Atlantic.
Nielsen, Einar Eg; Birnie-Gauvin, Kim; Baktoft, Henrik; Arrizabalaga, Haritz; Brodin, Tomas; Cardinale, Massimiliano; Casini, Michele; Helström, Gustav; Jansen, Teunis; Koed, Anders; Lundberg, Petter; MacKenzie, Brian R; Medina, Antonio; Post, Søren; Rodriguez-Ezpeleta, Naiara; Sundelöf, Andreas; Varela, José Luis; Aarestrup, Kim.
Afiliación
  • Nielsen EE; National Institute of Aquatic Resources Technical University of Denmark Silkeborg Denmark.
  • Birnie-Gauvin K; National Institute of Aquatic Resources Technical University of Denmark Silkeborg Denmark.
  • Baktoft H; National Institute of Aquatic Resources Technical University of Denmark Silkeborg Denmark.
  • Arrizabalaga H; AZTI, Marine Research Basque Research and Technology Alliance (BRTA), Herrera Kaia Pasaia Gipuzkoa Spain.
  • Brodin T; Department of Wildlife, Fish, and Environmental Studies Swedish University of Agricultural Sciences Umeå Sweden.
  • Cardinale M; Department of Aquatic Resources, Institute of Marine Research Swedish University of Agricultural Sciences Lysekil Sweden.
  • Casini M; Department of Aquatic Resources, Institute of Marine Research Swedish University of Agricultural Sciences Lysekil Sweden.
  • Helström G; Department of Biological, Geological and Environmental Sciences University of Bologna Bologna Italy.
  • Jansen T; Department of Wildlife, Fish, and Environmental Studies Swedish University of Agricultural Sciences Umeå Sweden.
  • Koed A; National Institute of Aquatic Resources Technical University of Denmark Silkeborg Denmark.
  • Lundberg P; GINR - Greenland Institute of Natural Resources Nuuk Greenland.
  • MacKenzie BR; National Institute of Aquatic Resources Technical University of Denmark Silkeborg Denmark.
  • Medina A; Department of Wildlife, Fish, and Environmental Studies Swedish University of Agricultural Sciences Umeå Sweden.
  • Post S; National Institute of Aquatic Resources Technical University of Denmark Silkeborg Denmark.
  • Rodriguez-Ezpeleta N; Departamento de Biología, Facultad de Ciencias del mar y Ambientales Universidad de Cádiz Cádiz Spain.
  • Sundelöf A; GINR - Greenland Institute of Natural Resources Nuuk Greenland.
  • Varela JL; AZTI, Marine Research Basque Research and Technology Alliance (BRTA) Sukarrieta Bizkaia Spain.
  • Aarestrup K; Department of Aquatic Resources, Institute of Marine Research Swedish University of Agricultural Sciences Lysekil Sweden.
Evol Appl ; 17(9): e70009, 2024 Sep.
Article en En | MEDLINE | ID: mdl-39301501
ABSTRACT
Knowledge about sex-specific difference in life-history traits-like growth, mortality, or behavior-is of key importance for management and conservation as these parameters are essential for predictive modeling of population sustainability. We applied a newly developed molecular sex identification method, in combination with a SNP (single nucleotide polymorphism) panel for inferring the population of origin, for more than 300 large Atlantic bluefin tuna (ABFT) collected over several years from newly reclaimed feeding grounds in the Northeast Atlantic. The vast majority (95%) of individuals were genetically assigned to the eastern Atlantic population, which migrates between spawning grounds in the Mediterranean and feeding grounds in the Northeast Atlantic. We found a consistent pattern of a male bias among the eastern Atlantic individuals, with a 4-year mean of 63% males (59%-65%). Males were most prominent within the smallest (< 230 cm) and largest (> 250 cm) length classes, while the sex ratio was close to 11 for intermediate sizes (230-250 cm). The results from this new, widely applicable, and noninvasive approach suggests differential occupancy or migration timing of ABFT males and females, which cannot be explained alone by sex-specific differences in growth. Our findings are corroborated by previous traditional studies of sex ratios in dead ABFT from the Atlantic, the Mediterranean, and the Gulf of Mexico. In concert with observed differences in growth and mortality rates between the sexes, these findings should be recognized in order to sustainably manage the resource, maintain productivity, and conserve diversity within the species.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Evol Appl Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Evol Appl Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido