eCite Digital Repository

Identification of morphologic traits for a rapid differentiation of Patagonian sprat (Sprattus fuegensis) and Chilean herring (Strangomera bentincki)

Citation

Aranis, A and Munoz, G and Quiroz, JC and Wiff, R and Gomez, A and Barrientos, MA, Identification of morphologic traits for a rapid differentiation of Patagonian sprat (Sprattus fuegensis) and Chilean herring (Strangomera bentincki), Latin American Journal of Aquatic Research, 42, (5) pp. 1063-1071. ISSN 0718-560X (2014) [Refereed Article]


Preview
PDF
Not available
631Kb
  

Copyright Statement

Copyright 2014 Latin American Journal of Aquatic Research

DOI: doi:10.3856/vol42-issue5-fulltext-11

Abstract

The artisanal purse seiner multispecies fishery operating in the interior waters of Chiloe Island captures Chilean herring (Strangomera bentincki) and Patagonian sprat (Sprattus fuegensis) at the same time in the same area. These species have very similar external morphology, difficulting the species identification in the field, even for an experience scientific observer. Therefore, the aim of this work is to propose the external morphologic traits to be considered for a rapid identification of these species in the field. 60 specimens of Chilean herring and 79 Patagonian sprat were analyzed. Individuals collected were identified at the level of species and the following measurements were recorded: total length, head length, snout, eye orbital and postorbital. Before the analysis, all measurements were standardized to avoid collinearity. Using multivariate statistics including principal component analysis, analysis of variance and covariance (ANOVA and ANCOVA), multivariate analysis of covariance (MANOVA) and linear discriminant analysis, we found that the post-orbital measurement is the morphological trait which shows the largest differentiation between species. We concluded that the post-orbital measurement is the single external morphological trait which enables a rapid identification of these species in the field. The results of this research can be taken as a baseline analysis upon the generation of field guides, and thus, supporting the species identification by scientific observers.

Item Details

Item Type:Refereed Article
Keywords:Strangomera bentincki, Sprattus fuegensis, species identification, morphometric traits, multivariate analysis, Chilean austral zone
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Animal Structure and Function
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Marine Flora, Fauna and Biodiversity
Author:Quiroz, JC (Mr Juan Quiroz Espinosa)
ID Code:98611
Year Published:2014
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2015-02-20
Last Modified:2015-08-06
Downloads:0

Repository Staff Only: item control page