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The foraging benefits of information and the penalty of ignorance

Olsson, Ola LU and Brown, JS (2006) In Oikos 112(2). p.260-273
Abstract
Patch use theory and the marginal value theorem predict that a foraging patch should be abandoned when the costs and benefits of foraging in the patch are equal. This has generally been interpreted as all patches being abandoned when their instantaneous intake rate equals the foraging costs. Bayesian foraging – patch departure is based on a prior estimate of patch qualities and sampling information from the current patch – predicts that instantaneous quitting harvest rates sometimes are not constant across patches but increase with search time in the patch. That is, correct Bayesian foraging theory has appeared incompatible with the widely accepted cost–benefit theories of foraging. In this paper we reconcile Bayesian foraging with... (More)
Patch use theory and the marginal value theorem predict that a foraging patch should be abandoned when the costs and benefits of foraging in the patch are equal. This has generally been interpreted as all patches being abandoned when their instantaneous intake rate equals the foraging costs. Bayesian foraging – patch departure is based on a prior estimate of patch qualities and sampling information from the current patch – predicts that instantaneous quitting harvest rates sometimes are not constant across patches but increase with search time in the patch. That is, correct Bayesian foraging theory has appeared incompatible with the widely accepted cost–benefit theories of foraging. In this paper we reconcile Bayesian foraging with cost–benefit theories. The general solution is that a patch should be left not when instantaneous quitting harvest rate reaches a constant level, but when potential quitting harvest rate does. That is, the forager should base its decision on the value now and in the future until the patch is left. We define the difference between potential and instantaneous quitting harvest rates as the foraging benefit of information, FBI. For clumped prey the FBI is positive, and by including this additional benefit of patch harvest the forager is able to reduce its penalty of ignorance. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Oikos
volume
112
issue
2
pages
260 - 273
publisher
Wiley-Blackwell
external identifiers
  • wos:000234800700004
  • scopus:33645120636
ISSN
1600-0706
DOI
10.1111/j.0030-1299.2006.13548.x
language
English
LU publication?
yes
id
4c6dc08d-7692-4209-8ab9-5f2fef3c5c55 (old id 155509)
date added to LUP
2007-06-26 11:00:42
date last changed
2019-06-16 03:44:56
@article{4c6dc08d-7692-4209-8ab9-5f2fef3c5c55,
  abstract     = {Patch use theory and the marginal value theorem predict that a foraging patch should be abandoned when the costs and benefits of foraging in the patch are equal. This has generally been interpreted as all patches being abandoned when their instantaneous intake rate equals the foraging costs. Bayesian foraging – patch departure is based on a prior estimate of patch qualities and sampling information from the current patch – predicts that instantaneous quitting harvest rates sometimes are not constant across patches but increase with search time in the patch. That is, correct Bayesian foraging theory has appeared incompatible with the widely accepted cost–benefit theories of foraging. In this paper we reconcile Bayesian foraging with cost–benefit theories. The general solution is that a patch should be left not when instantaneous quitting harvest rate reaches a constant level, but when potential quitting harvest rate does. That is, the forager should base its decision on the value now and in the future until the patch is left. We define the difference between potential and instantaneous quitting harvest rates as the foraging benefit of information, FBI. For clumped prey the FBI is positive, and by including this additional benefit of patch harvest the forager is able to reduce its penalty of ignorance.},
  author       = {Olsson, Ola and Brown, JS},
  issn         = {1600-0706},
  language     = {eng},
  number       = {2},
  pages        = {260--273},
  publisher    = {Wiley-Blackwell},
  series       = {Oikos},
  title        = {The foraging benefits of information and the penalty of ignorance},
  url          = {http://dx.doi.org/10.1111/j.0030-1299.2006.13548.x},
  volume       = {112},
  year         = {2006},
}