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Trace metal concentration and fish size: Variation among fish species in a Mediterranean river

Concentration of trace metals (Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb and As) in the muscle of six fish species was analyzed to determine the variation with fish size and fish species in an Iberian river with moderate metal pollution. Al, Fe and Zn were the most abundant metals across sites. Fish size and sampling site explained more variation than fish species, and a high intraspecific variability (among individuals) in metal loads was also observed. Considering the most spread species, concentrations were highest in bleak (Alburnus alburnus) and lowest in gudgeon (Gobio occitaniae) for all the elements. Metal loads were comparable with literature data from contaminated sites, often exceeding recommended European Environmental Quality Standards. The relationships between metal concentration and fish size varied markedly among sites, elements, and fish species. The slopes of these relationships were often significantly heterogeneous, a fact barely acknowledged in the literature, and were often negative, probably due to size-specific metabolic rates related to fish growth. © 2014 Elsevier Inc.

This research was supported by Spanish Ministry of Economy and Competitiveness through the project SCARCE (Consolider- Ingenio2010CSD200900065) and the University of Girona (ProjectSING12/09).RM held a doctoral fellowship from the Spanish Ministry of Education (AP2010-4025)

Elsevier

Manager: Ministerio de Ciencia e Innovación (Espanya)
Author: Merciai, Roberto
Guasch i Padró, Helena
Kumar, Awadhesh
Sabater, Sergi
García-Berthou, Emili
Abstract: Concentration of trace metals (Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb and As) in the muscle of six fish species was analyzed to determine the variation with fish size and fish species in an Iberian river with moderate metal pollution. Al, Fe and Zn were the most abundant metals across sites. Fish size and sampling site explained more variation than fish species, and a high intraspecific variability (among individuals) in metal loads was also observed. Considering the most spread species, concentrations were highest in bleak (Alburnus alburnus) and lowest in gudgeon (Gobio occitaniae) for all the elements. Metal loads were comparable with literature data from contaminated sites, often exceeding recommended European Environmental Quality Standards. The relationships between metal concentration and fish size varied markedly among sites, elements, and fish species. The slopes of these relationships were often significantly heterogeneous, a fact barely acknowledged in the literature, and were often negative, probably due to size-specific metabolic rates related to fish growth. © 2014 Elsevier Inc.
This research was supported by Spanish Ministry of Economy and Competitiveness through the project SCARCE (Consolider- Ingenio2010CSD200900065) and the University of Girona (ProjectSING12/09).RM held a doctoral fellowship from the Spanish Ministry of Education (AP2010-4025)
Document access: http://hdl.handle.net/2072/297939
Language: eng
Publisher: Elsevier
Rights: Tots els drets reservats
Subject: Peixos -- Efecte de la contaminació de l’aigua
Fishes -- Effect of water pollution on
Peixos -- Efecte dels productes químics
Fishes -- Effect of chemicals on
Metalls pesants -- Aspectes ambientals
Heavy metals -- Environmental aspects
Title: Trace metal concentration and fish size: Variation among fish species in a Mediterranean river
Type: info:eu-repo/semantics/article
Repository: Recercat

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