Por favor, use este identificador para citar o enlazar este ítem: http://dspace.azti.es/handle/24689/829
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Título : Otolith shape analysis as a tool for stock separation of albacore tuna feeding in the Northeast Atlantic
Autor : Duncan, Roxanne; Brophy, Deirdre; Arrizabalaga, Haritz
Citación : FISHERIES RESEARCH, 2018, 200, 68-74
Resumen : For management purposes, albacore tuna (Thunnus alalunga, Bonnaterre 1788) in the North Atlantic are considered to be from one homogenous stock. However, multiple lines of evidence suggest that there is some degree of stock complexity. In this study, the stock structure of North Atlantic albacore tuna is investigated using otolith shape analysis. Juvenile albacore tunas were collected from the commercial fishery in the Bay of Biscay region over a three-year period (2012-2014). Catches were concentrated in two main areas: within the Bay of Biscay (East) and off the western shelf edge (West). Otolith shape was defined using Elliptical Fourier analysis and was compared between albacore from these two catch locations using generalised canonical discriminant analysis. The results show significant differences in otolith shape between albacore from the Eastern and Western locations using Elliptical Fourier descriptors. The discriminant analysis and jack-knifed cross-validation classification correctly classified East and West samples with a success rate of 72\% and 75\% respectively. The results suggest that two components with distinct environmental life histories contribute to the fishery in the Northeast Atlantic. It also implies that albacore juveniles display some degree of fidelity to their feeding areas.
Palabras clave : Otolith shape analysis; Stock separation; Northeast Atlantic; Albacore tuna; Thunrrus alalunga; THUNNUS-ALALUNGA; GENETIC-STRUCTURE; SPAWNING AREAS; IDENTIFICATION; POPULATION; COD; BEHAVIOR; HABITAT; GROWTH; FISH
Fecha de publicación : 2018
Editorial : ELSEVIER SCIENCE BV
Tipo de documento: Article
Idioma: Inglés
DOI: 10.1016/j.fishres.2017.12.011
URI : http://dspace.azti.es/handle/24689/829
ISSN : 0165-7836
E-ISSN: 1872-6763
Patrocinador: MARES Joint Doctorate programme under Erasmus Mundus [FPA 2011-0016]
Aparece en las tipos de publicación: Artículos científicos



Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.