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Author Sernl, Emma ♦ Olsson, Ola ♦ Holmgren, Noél M. A.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Group Member ♦ Promote Group ♦ Group Size ♦ Group Size Increase ♦ Enhanced Exchange ♦ Accurate Estimate ♦ Foraging Area ♦ Current Patch ♦ Travelling Time ♦ Random Search ♦ Patch-foraging Scenario ♦ Mathematical Model ♦ Patch-leaving Policy ♦ Rate Decrease ♦ Negative Binomial Distribution ♦ Group Member Share Information ♦ Several Reason
Abstract Individuals may join groups for several reasons, one of which is the possibility of sharing information about the quality of a foraging area. Sharing information in a patch-foraging scenario gives each group member an opportunity to make a more accurate estimate of the quality of the patch. In this paper we present a mathematical model in which we study the effect of group size on patch-leaving policy and per capita intake rate. In the model, group members share information equally in a random search for food. Food is distributed in patches according to a negative binomial distribution. A prediction from our model is that, the larger the group, the earlier each group member should leave the current patch. We also find that the benefit from enhanced exchange of information does not exceed the cost of sharing food with group members. The per capita intake rate decreases as the group size increases. Therefore, animals should only form groups when other factors outweigh the costs, which is easiest to achieve when the travelling time is short.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2003-01-01