afrom May to June, covering the early life of juveniles and preceding collection of shrews in July.
bfrom June, when the first cohort of shrews was weaned, to March of the following year when shrews were collected between April and August
TABLE 3 a Results of the ANCOVA testing the relationship between skull height, width and length and age category (juveniles from July, subadults and adults) and year of sampling inS. araneus in Białowieża from 1955 to 1985. Significant effects are marked bold. b Mean dimensions of skull (in cm) with standard errors, reported for three age categories; different letters (a, b, c) mark significant differences between age categories (atP =0.05)