title: Effects of some environmental parameters on catalase activity measured in the mussel (Mytilus galloprovincialis) exposed to lindane.
abstract: Mussels (Mytilus galloprovincialis), collected from the Bizerta lagoon, were acclimated for four days to various conditions of temperature, salinity, photoperiod and food supply and then exposed to lindane at a concentration of 40 microg l(-1). Catalase activity, which is a biomarker of exposure to an oxidative stress, was measured in the whole soft tissues of control and assay groups. In control mussels, high temperature, high salinity and light duration significantly increased catalase activity whereas this activity decreased when food, composed of freeze-dried, algae was available. When mussels were treated with lindane, catalase activities were higher than in controls. This increase was significant with temperature, salinity and light duration. The food supply did not change catalase activity, which was always higher compared to controls. Oxidative stress was shown in mussels exposed to lindane. The results highlight the need of considering abiotic parameters in biomonitoring studies, and especially when using catalase as a biomarker.
authors.affiliation: Laboratoire de Bio-surveillance de l'Environnement, Unité d'Ecologie Côtière, Faculté des Sciences de Bizerte, 7021, Zarzouna, Tunisia.
authors.forename: Asma
authors.initials: A
authors.lastname: Khessiba
authors.forename: Michèle
authors.initials: M
authors.lastname: Roméo
authors.forename: Patricia
authors.initials: P
authors.lastname: Aïssa
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D049872:Bivalvia / Q000187:drug effects / Q000201:enzymology*; D002374:Catalase / Q000378:metabolism*; D001556:Hexachlorocyclohexane / Q000494:pharmacology*; D007306:Insecticides / Q000494:pharmacology*; D018384:Oxidative Stress / Q000502:physiology; D017440:Photoperiod; D012965:Sodium Chloride / Q000378:metabolism; D013696:Temperature
chemical_list: D015415:Biomarkers; D007306:Insecticides; D012965:Sodium Chloride; D001556:Hexachlorocyclohexane; D002374:Catalase