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Marine Ecology Progress Series

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MEPS 120:163-168 (1995)  -  doi:10.3354/meps120163

Effects of exposure and previous exposure to copper on growth of veliger larvae and survivorship of Mytilus edulis juveniles

Hoare, K., Davenport, J., Beaumont, A. R.

Exposure of Mytilus edulis L. (Mollusca: Bivalvia) to 8 ppb (ppb = ug l-1) added copper during the veliger larval or post-larval (spat) stages has no significant effects on survivorship or shell growth. However, previous exposure to 8 ppb added copper during the embryo stage significantly increases veliger growth rate and decreases spat survivorship in a population from the Menai Strait, Wales, UK, in which this level of copper causes a significant increase in embryo abnormality. No such effects of pre-exposure are seen in a population from the Westerschelde, The Netherlands, where 8 ppb added copper does not constitute a stress on the embryo. These 'pre-incubation' (embryo exposure) effects far outweigh any direct influence of 8 ppb copper exposure during the later stages and have a substantial effect on estimates of the toxicity of copper over the life cycle of M. edulis.

Mussels . Larvae . Copper . Pollution . Pre-exposure . Long-term . Mytilus edulis . The Netherlands . United Kingdom

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