Salinity tolerance of Theodoxus fluviatilis (Mollusca, Gastropoda) from freshwater and from different salinity regimes in the Baltic Sea
Kangas, P.; Skoog, G. (1978). Salinity tolerance of Theodoxus fluviatilis (Mollusca, Gastropoda) from freshwater and from different salinity regimes in the Baltic Sea. Estuar. Coast. Mar. Sci. 6(4): 409-416. https://dx.doi.org/10.1016/0302-3524(78)90131-7
In: Estuarine and Coastal Marine Science. Academic Press: London. ISSN 0302-3254; e-ISSN 1878-3023, more
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ANE, Baltic
Properties > Biological properties > Tolerance > Salinity tolerance
Gastropoda [WoRMS]; Theodoxus fluviatilis (Linnaeus, 1758) [WoRMS]
Baltic Sea [Marine Regions]
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| Abstract |
The salinity tolerance of adult Theodoxus fluviatilis was investigated on populations from freshwater and from three different salinity regimes in the Baltic Sea.The snails were taken from the salinity of their original habitats, and the transition to the experimental salinities was made gradually over a period of a few days. Under these conditions differences in tolerance between populations were found: a common range of high tolerance was found in all populations in salinities 1.5–10‰, while in higher (15–20‰) and lower (1.0–10‰) salinities, differences between populations seemed to be correlated to their origin. Populations from freshwater and low salinity showed a higher tolerance to the lowest salinities, while populations from higher salinities were more tolerant of the highest salinities tested. The freshwater animals showed, however, a somewhat higher tolerance in high salinities than might be expected from their origin. The tolerance at 5 °C was generally higher than at 15 °C. |
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