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Inter-annual variability in otolith chemistry of catfish Genidens barbus from South-western Atlantic estuaries

Published online by Cambridge University Press:  28 February 2017

Esteban Avigliano ,
Barbara Carvalho ,
Gonzalo Velasco ,
Pamela Tripodi  and
Alejandra Vanina Volpedo
Esteban Avigliano*
Affiliation:
Instituto de Investigaciones en Producción Animal (INPA-CONICET), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires (UBA), Av. Chorroarín 280 (C1427CWO), Ciudad Autónoma de Buenos Aires, Argentina
Barbara Carvalho
Affiliation:
Laboratório de Ictiologia, Universidade Federal do Paraná (UFPR), Av. Beira-mar s/n (83255-000), Pontal do Paraná, Paraná, Brazil
Gonzalo Velasco
Affiliation:
Instituto de Oceanografia, Universidade Federal do Rio Grande (FURG), Av. Italia, Km 8 (96203-900), Rio Grande, Rio Grande do Sul, Brazil
Pamela Tripodi
Affiliation:
Instituto de Investigación e Ingenieria Ambiental (3iA), Universidad Nacional de San Martín (UNSAM), Martín de Irigoyen 3100 (1650), San Martín, Buenos Aires, Argentina
Alejandra Vanina Volpedo
Affiliation:
Instituto de Investigaciones en Producción Animal (INPA-CONICET), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires (UBA), Av. Chorroarín 280 (C1427CWO), Ciudad Autónoma de Buenos Aires, Argentina
*
Correspondence should be addressed to: E. Avigliano, Instituto de Investigaciones en Producción Animal (INPA-CONICET), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires (UBA), Av. Chorroarín 280 (C1427CWO), Ciudad Autónoma de Buenos Aires, Argentina. email: estebanavigliano@conicet.gov.ar
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Abstract

The catfish Genidens barbus is a commercial species from South America. The aim of the present study was to examine the inter-annual variability in estuary-specific chemical signatures of otolith cores (Ba:Ca, Mg:Ca, Mn:Ca, Sr:Ca and Zn:Ca ratios) for three estuaries from Argentina and Brazil where adults were collected over multiple years. Secondarily, we evaluated whether the percentages of classification of individuals to their natal origin place are affected by the grouping of several cohorts. Most element:Ca ratios were not significantly different among year cohorts. Results from PERMANOVA revealed significant differences in the multi-element signatures of the otolith core between cohorts for the Plata River estuary (PR) (P = 0.006) and the Patos Lagoon (PL) (P = 0.03), while no significant differences (P = 0.9) were found for Paranaguá Bay (PB). The percentages of spatial classification (discriminant function analyses) decreased to between 15.5 and 25% for PR and PL when cohorts were grouped. This work makes it clear that the temporal variation in the chemical signature of the adult catfish otolith core can greatly affect the percentages of spatial classification.

Keywords

AriidaeInter-annual variabilityotolith chemical signaturesnursery area
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 98 , Issue 4 , June 2018 , pp. 855 - 865
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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