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Related Experiment Videos

Does information sharing promote group foraging?

Emma Sernland1, Ola Olsson, Noél M A Holmgren

  • 1Department of Natural Sciences, University of Skövde, PO Box 408, SE-541 28 Skövde, Sweden. emma.sernland@inv.his.se

Proceedings. Biological Sciences
|June 21, 2003
PubMed
Summary

Larger animal groups lead to earlier patch departure but lower individual food intake. Grouping is beneficial only when travel time is short, outweighing sharing costs.

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Area of Science:

  • Behavioral Ecology
  • Mathematical Modeling

Background:

  • Animals form groups for various reasons, including information sharing on foraging patch quality.
  • Information sharing can improve patch quality assessment in group-living animals.

Purpose of the Study:

  • To model the effect of group size on patch-leaving decisions and per capita intake rates.
  • To analyze the trade-offs between information sharing benefits and food sharing costs in foraging groups.

Main Methods:

  • Developed a mathematical model for group foraging with equal information sharing.
  • Assumed food distribution in patches follows a negative binomial distribution.
  • Analyzed patch-leaving policies and per capita intake rates as a function of group size.

Main Results:

Related Experiment Videos

  • Larger group sizes predict earlier patch departure for all members.
  • The benefits of enhanced information exchange do not compensate for the costs of food sharing.
  • Per capita intake rate declines significantly with increasing group size.

Conclusions:

  • Animals should form groups only when other factors, such as short travel times, outweigh the costs of reduced individual intake.
  • Group living in foraging scenarios presents a trade-off between collective information and individual resource acquisition.