Article

Seasonal variations of a battery of biomarkers and physiological indices for the mussel Mytilus galloprovincialis transplanted into the northwest Mediterranean Sea

Université du Havre, El Havre, Haute-Normandie, France
Comparative Biochemistry and Physiology Part C Toxicology & Pharmacology (Impact Factor: 2.3). 08/2004; 138(4):411-27. DOI: 10.1016/j.cca.2004.04.009
Source: PubMed

ABSTRACT

Seasonal variations of six mussel (Mytilus galloprovincialis) biomarkers at two sites in the Mediterranean Sea were compared with physiological indices (condition, growth and gonad maturation), environmental parameters (temperature, salinity and turbidity), and chemical contamination levels. The basal levels of acetylcholinesterase (AChE), DNA adducts, benzo[a]pyrene hydroxylase (BPH), heat-shock proteins (HSP70), metallothioneins (MT) and P-glycoprotein (P-gp)-mediated multixenobiotic resistance (MXR) were estimated as early warning signals in caged mussels sampled at Carteau (native site) and La Fourcade (transplantation site) over a 2-year period. The Carteau and La Fourcade mussels have specific chemical contamination profiles but a similar range of values. For example, both are highly contaminated by heavy metals (201 and 258.4 mg kg(-1) dw, respectively) and considered as moderately impacted for polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs). However, contamination levels at Carteau are twice as high for PAHs (101.5 mg g(-1) dw) and PCBs (90.2 mg g(-1) dw) than La Fourcade. The seasonal contamination trend at Carteau showed six-fold higher levels of pyrolytic pollutants in winter. Although few tissue lesions were detected in individuals studied at either site, greater parasitic infestation was observed at Carteau. The results of findings from the two Mediterranean pilot studies support the adaptability of transplanted mussels to be used as biomarkers and to establish physiological endpoints for chemical contaminant exposure.

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    • "Consequently , most European countries use mussels (i.e. Mytilus edulis, Mytilus galloprovincialis and Mytilus trossulus) as indicator species to monitor the chemical quality of their coastal and estuarine waters (Bodin et al., 2004; Moreira and Guilhermino, 2005; Minier et al., 2006; Mubiana and Blust, 2006; Brooks et al., 2009; Le on et al., 2013), but only few of them have incorporated contaminant-related biomarker measurements in their mussel monitoring programs (Palialexis et al., 2014). Mussels are considered an important component of integrated approaches for assessing marine environmental quality and, a range of different contaminants and contaminant-related biomarkers have been recommended to be monitored in the mussel component of a framework for integrated assessment of contaminants and their effects in the NE Atlantic and Mediterranean waters (UNEP/MAP, 1999; Vethaak et al., in this issue). "
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    • "In the present study, higher condition index values were observed in summer in comparison to winter (Fig. 3c). These results are in agreement with previous studies in mussels and oysters (Bodin et al., 2004; Soletchnik et al., 2006). Interestingly, significant differences between the reference and transplantation sites were observed in summer, but not in winter. "
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