uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Sensory perception plays a larger role in foraging efficiency than heavy-tailed movement strategies
Stanford Univ, Hopkins Marine Stn, Pacific Grove, CA 93950 USA;Univ Auckland, Leigh Marine Lab, Leigh, New Zealand.
Stanford Univ, Dept Biol, Stanford, CA 94305 USA.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Applied Mathematics and Statistics.ORCID iD: 0000-0003-2640-6490
Stanford Univ, Hopkins Marine Stn, Pacific Grove, CA 93950 USA.
2019 (English)In: Ecological Modelling, ISSN 0304-3800, E-ISSN 1872-7026, Vol. 404, p. 69-82Article in journal (Refereed) Published
Abstract [en]

Animals must balance their rates of energetic intake and expenditure while foraging. Several mathematical models have been put forward as energetically optimal foraging strategies when the food environment is sparse (i.e., the distance between food patches in the environment is much larger than the distance from which the forager can perceive food). In particular, Levy walks with a power law exponent approaching 1 are considered optimal for destructive foragers. However, these models have yet to explore the role of sensory perception in foraging success as the distance between food patches approaches the distance from which the forager can perceive food. Here, we used an agent-based modeling approach to address this question. Our results concur that lower values of the power law exponent (i.e. values approaching 1) result in the most food found, but in contrast to previous studies, we note that, in many cases, lower exponents are not optimal when we consider food found per unit distance traveled. For example, higher values of the exponent resulted in comparable or higher foraging success relative to lower values when the forager's range of sensory perception was restricted to an angle ± 30° from its current heading. In addition, we find that sensory perception has a larger effect on foraging success than the power law exponent. These results suggest that a deeper examination of how animals perceive food sources from a distance may affect longstanding assumptions regarding the optimality of Levy walk foraging patterns, and lend support to the developing theoretical shift towards models that place increasing emphasis on how organisms interact with their environments.

Place, publisher, year, edition, pages
2019. Vol. 404, p. 69-82
Keywords [en]
agent-based model, destructive foraging, environmental heterogeneity, Levy walk, optimal search, sensory perception
National Category
Ecology
Identifiers
URN: urn:nbn:se:uu:diva-388754DOI: 10.1016/j.ecolmodel.2019.02.015ISI: 000471208900008OAI: oai:DiVA.org:uu-388754DiVA, id: diva2:1342827
Available from: 2019-08-14 Created: 2019-08-14 Last updated: 2019-08-14Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

Liu, Yu

Search in DiVA

By author/editor
Liu, Yu
By organisation
Applied Mathematics and Statistics
In the same journal
Ecological Modelling
Ecology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 3 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf