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Contaminant and physiological differences of Spanish zebra mussel populations

AutorBarata Martí, Carlos CSIC ORCID ; Faria, Melissa CSIC ORCID; Blázquez, Mercedes CSIC ORCID ; Fernández, María; Navarro Cuenca, Anna CSIC; Lacorte Bruguera, Silvia CSIC ORCID; Piña, Benjamín CSIC ORCID
Fecha de publicación2011
Citación7th Symposium for European freshwater sciences (2011)
ResumenZebra mussel invaded Ebro River Basin in the 90s and now this species is distributed along this and neighbouring river basins such as that of Jucar river. Here we present the results from a three year study aimed to characterize contaminant and physiological differences of 11 established populations along the Ebro River and Jucar basin (Sitjar reservoir). Populations were sampled on early spring (March) and autumn (October). Up to 40 and 11 different contaminant and physiological responses, respectively, were measured. Contaminant body burdens included metals and persistent organic pollutants. Moreover, physiological and biochemical traits, such as filtering and respiration rates, gonadal development and biochemical responses (lipids, lipid peroxidation, DNA damage, multixenobiotic transporter membrane activities and antioxidant defensive systems) were also assessed. Results indicated important seasonal and geographic differences in the contaminant body burdens and physiological parameters among populations. In early spring most populations showed the highest levels of contaminants while their gonads exhibited an advanced maturation stage, the highest levels of lipids and the highest activities of the measured enzymes. Conversely, in late autumn most gonads were in a resting developmental stage whereas contaminant and lipid levels and most transporter or enzyme activities were low. Principal Component analyses evidenced that population differences in the studied parameters were highest in spring with Ebro’s populations showing increasing physiological stress and contaminant levels towards downstream sites.Populations from Mequinenza had the best physiological condition showing the highest levels of lipids and of detoxification defences, and those from the Flix reservoir the lowest.
DescripciónPoster presentado en el 7th Symposium for European freshwater sciences celebrado en Girona del 27 de junio al 1 de julio de 2011
URIhttp://hdl.handle.net/10261/82594
Aparece en las colecciones: (IDAEA) Comunicaciones congresos
(IATS) Comunicaciones congresos




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