Effects of salinity on the condition and survival of zebra mussels (Dereissena polymorpha) |
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Authors: | Bruce W. Kilgour Gerald L. Mackie Mark A. Baker Roger Keppel |
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Affiliation: | 1. Mackie and Associates Water Systems Analysts, 23 Avra Court, N1H 7B2, Guelph, Ontario, Canada 2. Consolidated Edison Company of New York, Inc. 4, Irving Place, 10003, New York, New York
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Abstract: | The objectives of this study were to determine the tolerance of various life stages of zebra mussels to salinity; determine the extent to which acclimation events in estuarine systems, affect tolerance of zebra mussels; and determine the effects of salinity on health or condition of adult zebra mussels. At high temperatures (18–20°C), the condition of zebra mussels is reduced at salinities above 1%.. However, at lower temperatures (3–12°C), the optimum salinity for zebra mussels is 2–4%.. The incipient lethal salinity of post-veligers is near 2%., of larger adults (5–15 mm) between 2%. and 4%., and of veliger larvae near 4.5%.. Zebra mussels are able to acclimate to slowly changing salinities (i.e., 1%. d?1) such that the time to 50% mortality of a population should be greater than 1 yr at temperatures near 20°C and salinites up to 8%. |
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