caa a22 4500 477091245 CHVBK 20180405111515.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF01237721 doi (NATIONALLICENCE)springer-10.1007/BF01237721 Perceptual constraints on optimal foraging: The effects of variation among foragers [Elektronische Daten] [Hamish Spencer, Martyn Kennedy, Russell Gray] Summary: We present a simple model of habitat selection in which individuals differ in their ability to discriminate between resource sites' profitabilities. The model investigates the effects of violating the ‘ideal' assumption of the well-known ideal free distribution (IFD). We show that (1) variability in perceptual limits within a population can significantly change the distribution of foraging animals even though the mean perceptual limit is the same, (2) the direction of this change depends on the proportion of the population that choose randomly between resource sites and (3) better perceivers are more likely to be found at individually more profitable sites, which, because of undermatching with respect to the IFD, are also the absolutely more profitable sites. We note that variability in perceptual limits almost always led to an undermatching of organisms to resources, thereby extending previous workers' results implying that the incorporation of any form of perceptual limits leads to undermatching with respect to the IFD. Chapman & Hall, 1996 ideal free distribution nationallicence perceptual limits nationallicence perceptual variability nationallicence psychological mechanisms nationallicence mathematical model nationallicence Spencer Hamish Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand aut Kennedy Martyn Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand aut Gray Russell Department of Psychology, University of Auckland, Private Bag 92019, Auckland, New Zealand aut Evolutionary Ecology Kluwer Academic Publishers 10/4(1996-07-01), 331-339 0269-7653 10:4<331 1996 10 10682 https://doi.org/10.1007/BF01237721 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01237721 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Spencer Hamish Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand aut NATIONALLICENCE 700 1- Kennedy Martyn Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand aut NATIONALLICENCE 700 1- Gray Russell Department of Psychology, University of Auckland, Private Bag 92019, Auckland, New Zealand aut NATIONALLICENCE 773 0- Evolutionary Ecology Kluwer Academic Publishers 10/4(1996-07-01), 331-339 0269-7653 10:4<331 1996 10 10682 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer