Open AccessIdentificación de stocks de <i>Engraulis ringens</i> en Chile utilizando morfometría de otolitos
Author(s) -
Cecilia Machuca,
Francisco Cerna,
Lizandro Muñoz
Publication year - 2019
Publication title -
revista de biología marina y oceanografía
Language(s) - English
Resource type - Journals
eISSN - 0718-1957
pISSN - 0717-3326
DOI - 10.22370/rbmo.2019.54.1.1674
Subject(s) - engraulis , anchovy , population , multivariate analysis of variance , morphometrics , geography , otolith , mathematics , fourier analysis , cartography , fourier transform , fishery , biology , statistics , fish <actinopterygii> , demography , sociology , mathematical analysis
Anchovy (Engraulis ringens) population units were analyzed in three zones off the coast of Chile: 1: Arica-Iquique, 2: Coquimbo and 3: Talcahuano-Valdivia from samples obtaineds during the 2012 spawning season. We used 50 left sagittae otoliths from each zone to perform a morphometric analysis, which included basic measurements, shape indexes and contour analysis (elliptical Fourier analysis). A MANOVA and Tukey multiple comparison analyses, applied on basic measures and shape indexes showed significant differences between zone 3 and zones 1 and 2. A classification by Canonical Discriminant analysis of elliptical Fourier harmonics, indicated significant differences among zones. It is concluded, therefore, that otolith shape analysis could be used to discriminate population units of Engraulis ringens. Better results were achieved using elliptic Fourier coefficients than using only shape indices.