Abstract
During 1983 and 1985 several batches of laboratory reared veliger larvae of Mytilus edulis and Pecten maximum here subjected to a rank of concentrations of added copper (CuCl2) over a 15-day period. M. edulis larvae were less sensitive, measured both as mortality (15-day LC50) of 400 μglitre−1) and reduced growth, than P. maximus larvae (15-day LC50 of 85μg litre−1). Both species appeared less sensitive to Cu than other bivallve larvae previously studied. Veliger larvae of M. edulis are from 7 to 10 times more tolerant of Cu than juveniles or adults and this unexpected finding is discussed in relation to the recent literatures on Cu toxicity and accumulation in mussels.
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