Field evidence for pervasive indirect effects of fishing on prey foraging behavior

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dc.contributor.author Madin, Elizabeth en_US
dc.contributor.author Gaines, Steven en_US
dc.contributor.author Warner, Rr en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-02-02T06:43:34Z
dc.date.available 2012-02-02T06:43:34Z
dc.date.issued 2010 en_US
dc.identifier 2010002361 en_US
dc.identifier.citation Madin Elizabeth, Gaines Steven, and Warner Rr 2010, 'Field evidence for pervasive indirect effects of fishing on prey foraging behavior', Ecological Society of America, vol. 91, no. 12, pp. 3563-3571. en_US
dc.identifier.issn 0012-9658 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/14795
dc.description.abstract The indirect, ecosystem-level consequences of ocean fishing, and particularly the mechanisms driving them, are poorly understood. Most studies focus on density-mediated trophic cascades, where removal of predators alternately causes increases and decreases in abundances of lower trophic levels. However, cascades could also be driven by where and when prey forage rather than solely by prey abundance. Over a large gradient of fishing intensity in the central Pacific?s remote northern Line Islands, including a nearly pristine, baseline coral reef system, we found that changes in predation risk elicit strong behavioral responses in foraging patterns across multiple prey fish species. These responses were observed as a function of both short-term (``acute??) risk and longer-term (``chronic??) risk, as well as when prey were exposed to model predators to isolate the effect of perceived predation risk from other potentially confounding factors. Compared to numerical prey responses, antipredator behavioral responses such as these can potentially have far greater net impacts (by occurring over entire assemblages) and operate over shorter temporal scales (with potentially instantaneous response times) in transmitting top-down effects. A rich body of literature exists on both the direct effects of human removal of predators from ecosystems and predators? effects on prey behavior. Our results draw together these lines of research and provide the first empirical evidence that large-scale human removal of predators from a natural ecosystem indirectly alters prey behavior. These behavioral changes may, in turn, drive previously unsuspected alterations in reef food webs. en_US
dc.language en_US
dc.publisher Ecological Society of America en_US
dc.relation.isbasedon http://dx.doi.org/10.1890/09-2174.1 en_US
dc.title Field evidence for pervasive indirect effects of fishing on prey foraging behavior en_US
dc.parent Ecology en_US
dc.journal.volume 91 en_US
dc.journal.number 12 en_US
dc.publocation United States en_US
dc.identifier.startpage 3563 en_US
dc.identifier.endpage 3571 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 060200 en_US
dc.personcode 109159 en_US
dc.personcode 0000047926 en_US
dc.personcode 0000064457 en_US
dc.percentage 100 en_US
dc.classification.name Ecology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords behavior; coral reef; fishing; food web; herbivore; indirect effects; Line Islands, Central Pacific; marine; predator en_US


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