Authors: Naima Mahmoud Mohamed Dellali Patricia Aissa Ezzeddine Mahmoudi
Publish Date: 2011/10/18
Volume: 184, Issue: 10, Pages: 5851-5861
Abstract
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 prespawning and postspawning 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 Tunisia The results show that CAT activity increased in gastropods exposed to the three cadmium concentrations C1 Cd 100 μg L−1 C2 Cd 200 μg L−1 and C3 Cd 300 μg L−1 and to the three permethrin doses C1 Perm 100 μg L−1 C2 Perm 150 μg L−1 and C3 Perm 200 μg L−1 tested A decrease in CAT was noted in the digestive gland of the H trunculus exposed to permethrin at the concentration of 200 μg L−1 during the prespawning and postspawning phases H trunculus in postspawning was more sensitive to cadmium and permethrin than in the prespawning phase The biochemical responses to pollutants cadmium and permethrin represented by CAT may act as a biomarker of exposure in this species
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