Table S1. Experimental temperatures(±SD), treatment groups, non sampling mortalities and age atfirst reproduction in six experiments.

Figure S1. Growth of P generationDaphnia in five experiments at indicated mean temperatures.UV-Day 1 and 3 refer to Daphnia that were exposed to UV-Bradiation beginning on Day 1 and 3 respectively. Points are meanlength (mm) ±SD. For individual points,n = 2 to 24. Total number ofobservations = 344.

Figure S2. Scatter plot of growth rates ofindividual control Daphnia in six experiments at indicated mean temperatures.

Figure S3. F1 production per possible event±SD (A), and size of first brood ±SD (B) in fiveexperiments at indicated mean temperatures. Number ofDaphnia that reproduced is indicated above and to the right of each bar.

Figure S4. Scatter plots of mean neonatal F1length per vial containing a single P generation Daphnia at22°C (A), and individual neonatal F1 Daphnia randomlyselected from pools at 30°C (B: control Daphnia; C:UVB-exposed Daphnia).

Figure S5. F2 production per possible event±SD at 20°C (A) and 25°C (B). Sample sizes areindicated in each bar and abbreviations are as inFig.  3. In Fig.  S5A, letters above the barsrepresent the results of pair-wise comparisons using theMann–Whitney U-test. All treatment groups weresignificantly different (P < 0.001). Thevariances of the data depicted in Fig.  S5B werehomogeneous and thus an ANOVA was used in their analysis(Table  4).

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