Figure 2. Choice of resources depends on net energetic efficiency.

The choice between resources at equal distance depends on their value for EI/EE (Eq. (22b)). This ratio increases asymptotically with nectar acquisition rate gaF to the limit value 1/c × e_R∕e_F. With larger e_R, e.g., for clover compared to OSR, EI/EE will level off at a higher value. When flower density is much higher, the resulting value of EI/EE may still be larger for the resource with the lower e_R. Curves refer to resources at 200 m and 1 km. Values for clover and OSR as specified in Table 2 and used in the scenarios are indicated.