TY - JOUR
T1 - Detecting opisthonema libertate (Günther, 1867) phenotypic stocks in northwestern coast of Mexico using geometric morphometrics based on body and otolith shape
AU - Pérez-Quiñonez, Carlos I.
AU - Quiñonez-Velázquez, Casimiro
AU - García-Rodríguez, Francisco J.
N1 - Publisher Copyright:
© 2018, Escuela de Ciencias del Mar. All rights reserved.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
KW - Anatomical structure
KW - Fisheries management
KW - Morphotypes
KW - Opisthonema libertate
KW - Shape
KW - Stock
UR - http://www.scopus.com/inward/record.url?scp=85056516383&partnerID=8YFLogxK
U2 - 10.3856/vol46-issue4-fulltext-15
DO - 10.3856/vol46-issue4-fulltext-15
M3 - Artículo
SN - 0718-560X
VL - 46
SP - 779
EP - 790
JO - Latin American Journal of Aquatic Research
JF - Latin American Journal of Aquatic Research
IS - 4
ER -