<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Repass, Robert Glenn</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Nutrient aspect of optimal foraging behavior</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">JRN</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1980</style></year></dates><publisher><style face="normal" font="default" size="100%">New Mexico State University</style></publisher><pub-location><style face="normal" font="default" size="100%">Las Cruces, New Mexico</style></pub-location><pages><style face="normal" font="default" size="100%">37</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">When tested under field conditions, the workers of colonies of the harvester an &lt;i&gt;Pogonomyrmex occidentalis&lt;/i&gt; will differentially recruit to patches of diet that are equal in caloric value but differ in nutrient quality.  The patches of diet presented to the colonies consisted of artificial &quot;seeds&quot; that varied in the percent protein composition....       The results of these experiments suggest that optimal foraging models based solely on energetic considerations may be too simplistic.  I suggest a generalization of Charnov's 1976 model that would allow the inclusion of nutrient components and other factors such as water content or toxin concentrations within the model.  Such a model should be of greater predictive value than a model based on energetics alone.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.1980-92155</style></accession-num></record></records></xml>