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Article . 2010 . Peer-reviewed
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Diversidad de peces demersales en la plataforma continental del Ecuador

Authors: Moncayo, D.; Trejos, R.; Maridueña, A.; Castro, R.;

Diversidad de peces demersales en la plataforma continental del Ecuador

Abstract

Se determine el contenido de Mercurio (Hg), Cadmio (Cd) y Plomo (Pb) en 18363 muestras de productos pesqueros colectadas durante el período enero del 2006 hasta julio del 2009. La determinación fue realizada empleando espectrofotometría de Absorción Atómica por generación de vapor frío (Hg) y horno de grafito (Cd y Pb), todas las concentraciones son expresadas en peso húmedo. Los análisis fueron realizados con el propósito de verificar que los productos pesqueros a ser exportados cumplen con los niveles establecidos en el Reglamento consolidado (CE)N°1881/2006, de la Unión Europea, que fija el conte¬nido máximo de determinados contaminantes en los productos alimenticios. Las concentraciones encontradas, en las muestras de peces, en su mayoría fueron menores a 1.0 mgHg.kg-1, 0.1 mgCd.kg-1 y 0.3 mgPb.kg-1, de mercurio, cadmio y plomo, respectivamente, observándose algunas diferencias entre el contenido de metales trazas y las especies. En casos excepcionales el contenido de mercurio excedió los Iímites permisibles principalmente en organismos predadores como atún (Thunus obesus, Thunus albacares, Katsuwonus pelamis) en un rango de 1.0 a 5.40 mgHg.kg-1 y picudo (Makaira mazara) con niveles entre 1.04 y 6.19 mgHg.kg-1. Los porcentajes anuales del contenido de mercurio que excedieron el límite permisible, relacionados con asociados al número de muestras de atún analizadas fueron menores al 1%. Mientras que para el picudo fueron mayores, alcanzando un máximo de 47.37 %. El cadmio en atún registro en forma puntual valores sobre el Iímite permisible en un rango entre 0.10 y 1.26 mgCd.kg-1, en el 5.75% de los análisis (3 muestras siendo el máximo porcentaje de 5.75 %) registrado durante el 2008. El contenido de plomo, mostro en forma general niveles inferiores al Iímite de cuantificación del método (0.035 mg/kg), excepto en dos muestras de atún que estuvieron sobre el Iímite permisible. Los resultados demostraron que la gran mayoría de los productos pesqueros analizados fueron aptos para el consu¬me humano no excedieron los Iímites establecidos en el Reglamento 1881/2006. The content of Mercury (Hg), Cadmium (Cd) and Lead (Pb) were determined in samples of fishery products collected during the period January 2006 to July 2009, using Atomic Absorption Spectrometry with cold vapor generation (Hg) and graphite furnace (Cd and Pb), all concentrations are expressed in wet weight. Analyses were performed with the objective of verifying that the fishery products intended to be exported meet the standards established in Regulation (EC) No. 1881/2006 of European Union setting maximum levels for certain contaminants in foodstuffs. Most of the concentrations found in fish samples, were below 1.0 mgHg.kg-1, 0.1 and 0.3 mgCd.kg mgPb.kg-1 mercury, cadmium and lead, respectively, showing some differences between metal content and species. In exceptional cases the mercury content exceeded the permissible limits mainly in predators such as tuna (Thunus obesus, Thunus albacares, Katsuwonus pelamis) in the range of 1.0 to 5.40 mgHg.kg-1 and Blue marlin (Makaira mazara) with levels between 1.04 and 6.19 mgHg.kg-1. The annual rates of mercury that exceeded the allowable limit, related to the number of tuna samples analyzed were less than 1 %. While for the blue marlin was higher, peaking at 47.37%. Cadmium in tuna showed concentrations over the permissible values in the range of 0.10 and 1.26 mg Cd.kg-1, the maximum rate of 5.75% (3 samples) recorded during 2008. The lead content, in general terms showed levels below the limit of quantification of the method (0.035 mg.kg-1), except in two samples of tuna which were above the permissible limit. The results showed that almost all fish products tested did not exceeded the met the standards established in Regulation (EC) No. 1881/2006. Published

Keywords

Heavy metals, Fishery products, Atomic absorption spectroscopy, Pollution effects, Bioaccumulation

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green