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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Network analyses support the role of prey preferences in shaping resource use patterns within five animal populations

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Lemos-Costa, Paula [1, 2] ; Pires, Mathias M. [3, 2] ; Araujo, Marcio S. [4] ; de Aguiar, Marcus A. M. [1] ; Guimaraes, Jr., Paulo R. [3]
Total Authors: 5
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, Dept Fis Mat Condensada, Campinas, SP - Brazil
[2] Univ Sao Paulo, Inst Biocencias, Programa Posgrad Ecol, Sao Paulo - Brazil
[3] Univ Sao Paulo, Inst Biociencias, Dept Ecol, Sao Paulo - Brazil
[4] Univ Estadual Julio de Mesquita Filho, Dept Ecol, Rio Claro - Brazil
Total Affiliations: 4
Document type: Journal article
Source: OIKOS; v. 125, n. 4, p. 492-501, APR 2016.
Web of Science Citations: 4

Individual variation is an inherent aspect of animal populations and understanding the mechanisms shaping resource use patterns within populations is crucial to comprehend how individuals partition resources. Theory predicts that differences in prey preferences among consumers and/or differences in the likelihood of adding new resources to their diets are key mechanisms underlying intrapopulation variation in resource use. We developed network models based on optimal diet theory that simulate how individuals consume resources under varying scenarios of individual variation in prey preferences and in the willingness of consuming alternate resources. We then investigated how the structure of individual-resource networks generated under each model compared to the structure of observed networks representing five classical examples of individual diet variation. Our results support the notion that, for the studied populations, individual variation in prey preferences is the major factor explaining patterns in individual-resource networks. In contrast, variation in the willingness of adding prey does not seem to play an important role in shaping patterns of resource use. Individual differences in prey preferences in the studied populations may be generated by complex behavioral rules related to cognitive constraints and experience. Our approach provides a pathway for mapping foraging models into network patterns, which may allow determining the possible mechanisms leading to variation in resource use within populations. (AU)

FAPESP's process: 09/54422-8 - Structure and coevolutionary dynamics in mutualistic networks
Grantee:Paulo Roberto Guimarães Junior
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 14/04036-2 - Spatially distributed population dynamics and speciation processes
Grantee:Marcus Aloizio Martinez de Aguiar
Support type: Regular Research Grants
FAPESP's process: 10/13996-9 - Resource use variation within populations: theoretical models and empiric evidence
Grantee:Paula Lemos da Costa
Support type: Scholarships in Brazil - Master
FAPESP's process: 10/15567-8 - Causes and consequences of individual specialization in Poecilia vivipara (Cyprinodontiformes, Poeciliidae)
Grantee:Márcio Silva Araújo
Support type: Research Grants - Young Investigators Grants