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dc.creatorPérez-Quiñonez,Carlos I.
dc.creatorQuiñonez-Velázquez,Casimiro
dc.creatorGarcía-Rodríguez,Francisco J.
dc.date2018-09-01
dc.date.accessioned2019-05-03T13:28:24Z
dc.date.available2019-05-03T13:28:24Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000400779
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/88471
dc.descriptionABSTRACT Stock discrimination is essential for biomass population assessment and essential for the fisheries management. The analysis of shape differences in anatomical structures (e.g., body shape, otoliths, scales) has been relevant issue in the study of population structure. We evaluated the hypothesis on the existence of a stock-structured population of Pacific thread herring Opisthonema libertate in the northwestern coast of Mexico. Geometric morphometric methods were used to analyze body and otolith shape. Samples come from at three commercial fishery-landing sites: Magdalena Bay, Guaymas, and Mazatlan, Mexico. Results based on body and otolith shape support the existence of different morphotypes by location. Body shape allowed better discrimination than otolith shape. The differences observed between the phenotypic stocks suggest seasonal movements, which are linked to the marine current system in this region, particularly to the California Current and the North Equatorial Counter Current.
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dc.languageen
dc.publisherPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
dc.relation10.3856/vol46-issue4-fulltext-15
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceLatin american journal of aquatic research v.46 n.4 2018
dc.subjectOpisthonema libértate
dc.subjectstock
dc.subjectmorphotypes
dc.subjectanatomical structure
dc.subjectshape
dc.subjectfisheries management
dc.titleDetecting Opisthonema libertate (Günther, 1867) phenotypic stocks in northwestern coast of Mexico using geometric morphometrics based on body and otolith shape


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