Table 2.
Pollinators of Silene acutifolia in the two years of study (Cañones del Sil population)
| % visited flowers (n) | ||
|---|---|---|
| Pollinators | 1997 | 1998 |
| Hymenoptera | ||
| Apis mellifera | 0·2 (4) | 0·1 (5) |
| Bombus pascuorum | 0·7 (16) | 25·6 (970) |
| Bombus hortorum | 5·9 (143) | 59·6 (2257) |
| Bombus terrestris | 0 | 0·1 (2) |
| Bombus unidentified | _ | 1·2 (44) |
| Anthophora crassipes, A. spp. | 66·4 (1597) | 1·5 (56) |
| Chelostoma spp. | 0 | 0·03 (1) |
| Hymenoptera S.I. | 1·4 (34) | 1·1 (42) |
| Lepidoptera | ||
| Macroglossum stellatarum | 0·6 (14) | 0·7 (27) |
| Hemaris fuciformis | 6·9 (165) | 1·1 (42) |
| Gonepterix rhamni | 0·7 (18) | 0·3 (13) |
| Unidentified | _ | 0·1 (2) |
| Diptera | ||
| Bombylius spp. | 15·9 (382) | 2·5 (96) |
| Syrphidae | 0·3 (8) | 0·1 (3) |
| Unidentified | 1·0 (23) | 0·1 (5) |
| Nectar robbers | ||
| Anthophora sp. | 0 | 5·9 (222) |
The values represent percentage of visited flowers, in parenthesis number of flowers visited per insect taxa (27 h in 1997 and 28 h in 1998).