Cardiac and Lysosomal Responses to Periodic Copper in the Mussel Perna viridis (Bivalvia: Mytilidae) |
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| Authors: | Shaun Nicholson |
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| Institution: | The Swire Institute of Marine Science, Department of Ecology and Biodiversity, The University of Hong Kong, Hong Kong, People's Republic of China |
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| Abstract: | Biological monitoring of metals in marine waters often employs tissue residue analyses from bivalves. Chemical residues in tissues do not elucidate biological injury, however, whereas biomarkers, do afford sensitive stress indices. Physiological and cytological responses were evaluated in laboratory experiments from the mussel Perna viridis in order to assess the species’ suitability for pollution monitoring in the tropics. Periodic copper exposure increased tissue residues but failed to perturb cardiac activity. Copper destabilized haemocyte lysosomal membranes in a exposure-dependent relationship showing a sensitive, rapid, indication of stress. Cytological biomarkers from P. viridis have potential as indices of pollutant exposure and could facilitate effective biomonitoring of water quality throughout South-east Asia. |
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| Keywords: | Perna viridis copper cardiac activity lysosome membrane stability |
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