Table 4: Comparison of pollen availability and pollen usage by Ceratina flavipes and Phenology of the total dry weight of pollen for each flowering species during the breeding season of C. flavipes. The number of flowers is shown in parentheses. Total pollen mass was calculated as m×n, where m is the average dry pollen weight per flower (from Table 3) and n is the number of flowers. Availability and usage differed significantly among species.

Number of pollen grants (Number of flower head)
Flowering sp.AvailabilityUsing [83 balls]AvailabilityUsing [47 balls]AvailabilityUsing [8 balls]AvailabilityUsing [10 balls]
6/12-13LL6/18–20ML6/26-27SL6/30–7/1E

Vicia cracca0.001062351.70 (90)59145.50 (350)012542.40 (480)1
Rosa rugosa7227.09 (639)937251256.92 (4532)560244991.18 (3978)9816853.86 (606)979
Rosa parvifolius0.004666371.58 (33)2546675.60 (60)51835941.92 (3192)794
Melilotus suaveolens0.0000.0001453.40 (215)017778.80 (2630)0
Picris hieracioides0.0073972.36 (219)551602.84 (361)05772.00 (1300)6
Lathyrus japonicus4091.49 (1521)9013619.47 (5063)414040.40 (1365)0515.04 (60)0
Oenothera biennis0.0000.0001.15 (1)0623.3 (542)0
Calystegia soldanella0.00016.86 (2)00.0001.41 (8)0
others0.0022932205.64 (759)11510.00101111.18 (631)220

G-testX2 = 24017.79X2= 22632.59X2 = 11782.58X2 = 9979.381
P<.01P<.01P<.01P<.01