Body mass and sex ratio of current-year (A) and 1-year-old (B) <i>Gonioctena quinquepunctata</i> beetles over time. Numbers 1–6 and 1–8 indicate successive dates of insect collection (see Materials and Methods).

One-way ANOVA was used to determine the effect of term (length of the sampling period) on the body mass of females (current-year, R2 = 0.1177, P < 0.0001; 1-year-old, R2 = 0.0895, P < 0.0001), males (current-year, R2 = 0.2902, P < 0.0001; 1-year-old, R2 = 0.1882, P < 0.0001), and the sex ratio (current-year, R2 = 0.1284, P = 0.0986; 1-year-old, R2 = 0.7117, P < 0.0001).