dc.date.accessioned | 2013-12-19T15:05:39Z | |
dc.date.available | 2013-12-19T15:05:39Z | |
dc.date.created | 2013-10-27T20:49:30Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | Gautestad, Arild O. Mysterud, Atle . The Lévy flight foraging hypothesis: forgetting about memory may lead to false verification of Brownian motion. Movement Ecology. 2013, 1(9), 1-18 | |
dc.identifier.uri | http://hdl.handle.net/10852/37930 | |
dc.description.abstract | Background. The Lévy flight foraging hypothesis predicts a transition from scale-free Lévy walk (LW) to scale-specific Brownian motion (BM) as an animal moves from resource-poor towards resource-rich environment. However, the LW-BM continuum implies a premise of memory-less search, which contradicts the cognitive capacity of vertebrates.
Results. We describe methods to test if apparent support for LW-BM transitions may rather be a statistical artifact from movement under varying intensity of site fidelity. A higher frequency of returns to previously visited patches (stronger site fidelity) may erroneously be interpreted as a switch from LW towards BM. Simulations of scale-free, memory-enhanced space use illustrate how the ratio between return events and scale-free exploratory movement translates to varying strength of site fidelity. An expanded analysis of GPS data of 18 female red deer, Cervus elaphus, strengthens previous empirical support of memory-enhanced and scale-free space use in a northern forest ecosystem.
Conclusion. A statistical mechanical model architecture that describes foraging under environment-dependent variation of site fidelity may allow for higher realism of optimal search models and movement ecology in general, in particular for vertebrates with high cognitive capacity. | |
dc.language | EN | |
dc.rights | Attribution 2.0 Generic | |
dc.rights.uri | http://creativecommons.org/licenses/by/2.0/ | |
dc.title | The Lévy flight foraging hypothesis: forgetting about memory may lead to false verification of Brownian motion | |
dc.type | Journal article | |
dc.creator.author | Gautestad, Arild O. | |
dc.creator.author | Mysterud, Atle | |
cristin.unitcode | 185,15,21,0 | |
cristin.unitname | Institutt for biovitenskap | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1060669 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Movement Ecology&rft.volume=1&rft.spage=1&rft.date=2013 | |
dc.identifier.jtitle | Movement Ecology | |
dc.identifier.volume | 1 | |
dc.identifier.doi | http://dx.doi.org/10.1186/2051-3933-1-9 | |
dc.identifier.urn | URN:NBN:no-40030 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 2051-3933 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/37930/1/Gautestad_2013_MovEcol_forgetting+about+memory.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | 9 | |