2001
DOI: 10.4067/s0718-19572001000100003
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Influencia de variables estacionales, espaciales, biológicas y ambientales en la bioacumulación de mercurio total y metilmercurio en Tagelus dombeii

Abstract: Se realizó un estudio en la bahía San Vicente (Concepción, Chile) tendiente a establecer la influencia de variables estacionales, espaciales, biológicas y ambientales en la capacidad de bioacumulación de Hg total y CH 3

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Cited by 10 publications
(9 citation statements)
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“…This is the case for As, which is usually ingested as a more toxic inorganic chemical species and is converted by the body into arsenosugar or arsenobetaine, one of the most abundant species in aquatic organisms, which are less toxic compounds 48 . The situation of Hg is opposite to that of As; Hg is accumulated in the tissues of fish and bivalves usually as methyl mercury, more toxic, while the source that supplies is usually the less toxic inorganic mercury 49 . Metallothioneins are involved in the homeostasis mechanism of an aquatic organism in which a toxic element participates.…”
Section: Mercury In Fishmentioning
confidence: 99%
“…This is the case for As, which is usually ingested as a more toxic inorganic chemical species and is converted by the body into arsenosugar or arsenobetaine, one of the most abundant species in aquatic organisms, which are less toxic compounds 48 . The situation of Hg is opposite to that of As; Hg is accumulated in the tissues of fish and bivalves usually as methyl mercury, more toxic, while the source that supplies is usually the less toxic inorganic mercury 49 . Metallothioneins are involved in the homeostasis mechanism of an aquatic organism in which a toxic element participates.…”
Section: Mercury In Fishmentioning
confidence: 99%
“…In Chile, however, the biomagnification of metals is a problem that has not been addressed from a scientific point of view, nor has it been considered to establish quality standards for marine resources destined for human consumption. A few studies published in recent years report metal levels in marine organisms (Díaz et al 2001, Castillo and Valdés 2011, Calderón and Valdés 2012, Castro and Valdés 2012), but to the best of our knowledge there are no studies that describe the process whereby substances are transferred through the food chains or that assess the risk to marine communities and human health. This is particularly important because different experiments confirm that marine organisms can accumulate trace metals obtained from their food sources (Wang and Rainbow 2000, Rainbow and Wang 2001, Xu and Wang 2002.…”
Section: Concholepas Concholepasmentioning
confidence: 99%
“…Sin embargo, en Chile, la biomagnificación de metales es una problemática que no ha sido abordada desde el punto de vista científico y tampoco ha sido incluida en la generación de normas de calidad para recursos marinos de consumo humano. Tan solo existen algunos trabajos publicados en los últimos años que reportan contenido de metales en organismos marinos (Díaz et al 2001, Castillo y Valdés 2011, Calderón y Valdés 2012, Castro y Valdés 2012, pero prácticamente no hay estudios que describan los procesos de transferencia de estas sustancias a través de las cadenas tróficas, ni trabajos que evalúen el riesgo para las comunidades marinas y para la salud humana. Esto es particularmente importante toda vez que diferentes experimentos confirman que los organismos marinos tienen la capacidad de retener metales traza obtenidos desde las fuentes de alimento (Wang y Rainbow 2000, Rainbow y Wang 2001, Xu y Wang 2002.…”
Section: Concholepas Concholepasunclassified
“…Existe escasa información publicada en Chile sobre la concentración de metales en tejido de organismos marinos (Ahumada 1994, Díaz et al 2001, Castillo & Valdés 2012, Castro & Valdés 2012 y no hay registros del contenido de metales en organismos que habitan áreas poco intervenidas o prístinas. La concentración de metales en las distintas matrices ambientales de áreas poco intervenidas, debería estar manejada por procesos naturales que dependen de las características geológicas, físicas, químicas y biológicas, para alcanzar ciertos equilibrios naturales.…”
Section: Introductionunclassified