Exact(17)
No invitations to the crowds flying overhead in circles -- I mean, foraging -- for the last marked-down designer backpack.
However, mean foraging trip durations of about 20 minutes have also been reported during the summer in one study [17], although these bees were also observed to be utilising mass flowering plants (e.g. Rhododendron spp. and Rubus spp).
Resource pooling in a group with skew is beneficial, whenever mean foraging success is below the reproduction threshold (s).
In general they predict that individuals should be risk averse if their mean foraging success surpasses a critical threshold needed for survival.
This prediction has been confirmed by the observation that spiders form groups whenever mean foraging success is high [ 22, 24, 25].
With sufficient variance in foraging success some solitary individuals will be able to reproduce even if the mean foraging success is below the reproduction threshold.
Similar(43)
Home range size varies according to prey availability – when winter hits that means foraging further afield, increasing sighting probabilities.
Number of steer-grazing-days was 547, 655, and 625 d for R-RG, O-RG, and O-R-RG, respectively, and mean forage allowance across all treatments was 1.06 kg DM/ kg steer BW over the 140-d grazing experiment.
Although DIS birds foraged more efficiently than ADV birds on free food (mean DIS foraging efficiency > mean ADV foraging efficiency in three of four trials), the difference between treatments was not present for CFL (Fig. 4).
We were unable to quantify whether this also means that foraging efficiency (i.e. nectar consumption per time) is reduced, or whether it simply reflects a difference in flower handling.
The ability to pool group resources when provisioning offspring means that foraging bouts, which represent samples from the environment, increase with group size.
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