| biochemical response of the mussel mytilus galloprovincialis from bizerta (tunisia) to chemical pollutant exposure. | three biomarkers (glutathione s-transferase [gst] activity, catalase [cat] activity, and malonedialdehyde [mda] levels) were measured in specimens of the mussel mytilus galloprovincialis collected from two different stations (bc and mj) in the lagoon of bizerta (tunisia). animals were allowed to acclimate in the laboratory for some days. they were then exposed for 48 h to two concentrations of pp'dde and two doses of mercury chloride. the acclimation period increased cat activities and mda level ... | 2001 | 11243324 |
| biomarkers in ruditapes decussatus: a potential bioindicator species. | the clam ruditapes decussatus is distributed worldwide and due to its ecological and economical interest has been proposed as a bioindicator in areas where mussels are not available. the accumulation of several anthropogenic compounds in their tissues suggests that they possess mechanisms that allow them to cope with the toxic effects of these contaminants. besides pollutant uptake, the use of biomarkers is pointed out in this paper since it is a promising approach to monitor the effect of these ... | 2004 | 15764295 |
| responses of hexaplex (murex) trunculus to selected pollutants. | cadmium, copper and zinc concentrations (in whole soft body and in tissues) were measured in hexaplex trunculus collected from the bizerta lagoon in tunisia. an evaluation of the biological effects of the most toxic metals (cadmium and copper) and of two organics (carbofuran and lindane), present in the sediments of the bizerta lagoon, was attempted by measuring biomarkers (acetylcholinesterase: ache, catalase: cat and glutathione s-transferase: gst activities) in animals experimentally exposed ... | 2006 | 16257038 |
| seasonal variation of oxidative stress biomarkers in clams ruditapes decussatus sampled from tunisian coastal areas. | seven (7) sites from to the tunisian coastal area were monitored through four seasons using several oxidative stress biomarkers including lipid peroxidation. catalase (cat) specific activity was determined in clam ruditapes decussatus digestive gland. lipid peroxidation was assessed in the same tissues using malondialdehyde (mda) concentration, neutral lipid (nl) and lipofuscin accumulation. results show that catalase specific activity varies between sites and fluctuates in time. the highest cat ... | 2009 | 18594996 |
| acute toxicities of cadmium and permethrin on the pre-spawning and post-spawning phases of hexaplex trunculus from bizerta lagoon, tunisia. | marine gastropods, exposed to anthropogenic pollution, accumulate high chemical concentrations in their tissues, especially in the digestive glands. an evaluation of the impacts of cadmium (cd) and permethrin (perm), coupled with reproductive events (pre-spawning and post-spawning phase) throughout the year, was attempted by measuring catalase (cat), a biomarker of defence, on hexaplex trunculus experimentally exposed for 48 or 96 h. specimens of gastropods were sampled from bizerta lagoon (tuni ... | 2011 | 22006263 |