This data set contains means, standard deviation (SD) and standard error (SE) of fecundity rate (daily per female egg output), midpoint of egg output (time to produce half the eggs in a cage over the time interval tested) and mortality (number of flies alive out of 34 at the end of the experiment) for seven D. melanogaster populations. Note longitudes in data are approximate. When using this data, please cite the original publication: Hoffmann, A. A., Scott, M., Partridge, L. and Hallas, R. (2003). Overwintering in Drosophila melanogaster: outdoor field cage experiments on clinal and laboratory selected populations help to elucidate traits under selection. Journal of Evolutionary Biology 16: 614-623