NilssonOrtman2014_Headwidth_Data-1 ...

Head widths (”hw”) of larvae of six species of damselflies (”spec”) reared in the laboratory at three or four temperatures ("temp"). Head widths are in the unit of millimeter. Head widths were measured at four different ages (”day”). These measurements were made immediately following hatching (day = 0),and at the age of 42, 84 and 126 days. Different species and populations were reared in three different years (”year”). Each species was sampled from populations at three different latitudes, namely near its southern range limit, at the core of its range and near the northern range limit (”lat”,... Mehr ...