Tolerance of Freshwater Invertebrates to Changes in Water Salinity

Abstract

Tolerance to an increase or decrease in water salinity was studied in experiments with some species of freshwater turbellarians, oligochaetes, leeches, mollusks, crustaceans, caddis flies, biting midges, and chironomids from water bodies of the Upper Volga basin. Insect larvae and crustaceans were most tolerant, whereas mollusks and leeches were sensitive to a decrease in water salinity. Specific responses of the studied species to changes in water salinity were revealed.

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