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

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Show simple item record Madin, EM Gaines, SD Warner, R 2012-02-02T06:43:34Z 2010-01
dc.identifier.citation Ecology, 2010, 91 (12), pp. 3563 - 3571
dc.identifier.issn 0012-9658
dc.identifier.other C1 en_US
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 Pacifics 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.
dc.publisher Ecological Society of America
dc.relation.isbasedon 10.1890/09-2174.1
dc.title Field evidence for pervasive indirect effects of fishing on prey foraging behavior
dc.type Journal Article
dc.parent Ecology
dc.journal.volume 12
dc.journal.volume 91
dc.journal.number 12 en_US
dc.publocation United States en_US
dc.identifier.startpage 3563 en_US
dc.identifier.endpage 3571 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0602 Ecology
dc.personcode 109159
dc.percentage 100 en_US Ecology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US 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
dc.description.keywords behavior
dc.description.keywords coral reef
dc.description.keywords fishing
dc.description.keywords food web
dc.description.keywords herbivore
dc.description.keywords indirect effects
dc.description.keywords Line Islands, Central Pacific
dc.description.keywords marine
dc.description.keywords predator
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
utslib.collection.history Closed (ID: 3)

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