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Primeros registros e intervalos de distribución de Holothuria (Theelothuria) princeps Selenka, 1867 (Echinodermata: Holothuroidea: Holothuriidae) en el golfo de Morrosquillo, Caribe Colombiano

Identificación de stocks de Engraulis ringens en Chile utilizando morfometría de otolitos

Authors

CORRESPONDING

Cecilia Machuca

cecilia.machuca@ifop.cl

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1

Departamento de Evaluación de Recursos, División de Investigación Pesquera, Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile

Francisco Cerna

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1

Departamento de Evaluación de Recursos, División de Investigación Pesquera, Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile

Lizandro Muñoz

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1

Departamento de Evaluación de Recursos, División de Investigación Pesquera, Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile

Abstract

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 obtained 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.

Key words

Engraulis ringens, otolith morphometric, stock identification, Chile

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