Fig. 1.

Megachile rotundata provision size and adult body weight of diapausers and nondiapausers from field-collected nests. (A) Example of an x-radiograph of collected nests. Individual provisions were traced, and the area enclosed in the outline was calculated. (B) The relationship between provision size and diapause probability. Each line represents the logistic regression for one year and sex combination. (C) Adult body weight of male and female diapausers and nondiapausers from nests collected in Year 1 and Year 2. Boxes extend to upper and lower quartiles, line within box represents median, whiskers extend to 1.5 × interquartile distance (white boxes: Diapausers, gray boxes: Nondiapausers, **: Tukey HSD P < 0.001, ns: not significant). (D) The relationship between provision size and adult body weight. Each line represents the linear regression for one year and diapause status combination.