Research Article
Some Unresolved Issues of Measuring the Efficiency of Pollinators: Experimentally Testing and Assessing the Predictive Power of Different Methods
Table 6
Foraging modes, number of foragers, foraging rates, and pollen transfer efficiency of different flower visitors of toria (Brassica campestris).
| Parameter | Foraging mode | Visitor species | Andrena ilerda | Apis dorsata | Apis florea | Apis mellifera |
| No. of foragers /m2(a) | N | 0 | 0 | 3.94±0.49 | 0.97±0.08 (b) | P | 0 | 0.19±0.02 | 1.07±0.09 | 0.67±0.05 (c) | NP | 0.73±0.05 | 1.91±0.18 | 4.14±0.52 | 2.11±0.21 (c) | N+P+NP | 0.73±0.05 | 2.10±0.20 | 9.15±0.10 | 3.75±0.50 (c) |
| Foraging rate (per minute)(a) | N | 0 | 0 | nt | nt | P | 0 | 9.33±1.4 | 6.3±0.72 | 11.46±1.35 (c) | NP | 9.39±1.6 | 5.5±0.7 | 2.50±0.39 | 8.45±0.69 (c) |
| PTE (per minute) | 9.39 | 5.85 | 1.87 | 6.80 |
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Abbreviations are as in Table 5. |