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dc.contributor.authorDeacon, Amy E.
dc.contributor.authorJones, Faith A. M.
dc.contributor.authorMagurran, Anne E.
dc.identifier.citationDeacon , A E , Jones , F A M & Magurran , A E 2018 , ' Gradients in predation risk in a tropical river system ' , Current Zoology , vol. 64 , no. 2 , pp. 213-221 .
dc.identifier.otherPURE: 253209922
dc.identifier.otherPURE UUID: 0e3b372c-7bea-4045-aead-f6f0c2e112f7
dc.identifier.otherScopus: 85047427201
dc.identifier.otherORCID: /0000-0002-0036-2795/work/45366206
dc.identifier.otherORCID: /0000-0001-6571-714X/work/45366272
dc.identifier.otherWOS: 000436417900009
dc.descriptionWe are grateful for 2 European Research Council grants (BIOTIME 250189 and BioCHANGE 727440).en
dc.description.abstractThe importance of predation risk as a key driver of evolutionary change is exemplified by the Northern Range in Trinidad, where research on guppies living in multiple parallel streams has provided invaluable insights into the process of evolution by natural selection. Although Trinidadian guppies are now a textbook example of evolution in action, studies have generally categorized predation as a dichotomous variable, representing high or low risk. Yet, ecologists appreciate that community structure and the attendant predation risk vary substantially over space and time. Here, we use data from a longitudinal study of fish assemblages at 16 different sites in the Northern Range to quantify temporal and spatial variation in predation risk. Specifically we ask: 1) Is there evidence for a gradient in predation risk? 2) Does the ranking of sites (by risk) change with the definition of the predator community (in terms of species composition and abundance currency), and 3) Are site rankings consistent over time? We find compelling evidence that sites lie along a continuum of risk. However, site rankings along this gradient depend on how predation is quantified in terms of the species considered to be predators and the abundance currency is used. Nonetheless, for a given categorization and currency, rankings are relatively consistent over time. Our study suggests that consideration of predation gradients will lead to a more nuanced understanding of the role of predation risk in behavioral and evolutionary ecology. It also emphasizes the need to justify and report the definition of predation risk being used.
dc.relation.ispartofCurrent Zoologyen
dc.rights© The Author(s) (2018). Published by Oxford University Press. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (, which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.comen
dc.subjectAbundance currencyen
dc.subjectPoecilia reticulataen
dc.subjectPredation risken
dc.subjectTrinidadian guppyen
dc.subjectQH301 Biologyen
dc.titleGradients in predation risk in a tropical river systemen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews.Institute of Behavioural and Neural Sciencesen
dc.contributor.institutionUniversity of St Andrews.St Andrews Sustainability Instituteen
dc.contributor.institutionUniversity of St Andrews.Fish Behaviour and Biodiversity Research Groupen
dc.contributor.institutionUniversity of St Andrews.Centre for Research into Ecological & Environmental Modellingen
dc.contributor.institutionUniversity of St Andrews.Centre for Biological Diversityen
dc.description.statusPeer revieweden

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