Long-term temperature acclimation in Daphnia magna: effects on filtering rates

Populations of a laboratoiy clone of Daphnia magna were acclimatedat 5, 10, 15 and 24C, and a varying temperature regin for aminimum of 70 days. The effect of temperature (5–25C)on filtering rates was measured for animals acclimated to theconstant temperatures and for a wild population collected froma reservoir. Acclimation temperature strongly influenced ffltcrmgrates at test temperatures. Animals with acclimation temperaturesclosest to the test temperature tended to have highest filteringrates at that temperature.