Mechanisms for climate-induced mortality of fish populations in whole-lake experiments

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dc.contributor.author Biro, PA
dc.contributor.author Post, JR
dc.contributor.author Booth, DJ
dc.date.accessioned 2009-12-21T02:30:15Z
dc.date.issued 2007-06-05
dc.identifier.citation Proceedings of the National Academy of Sciences of the United States of America, 2007, 104 (23), pp. 9715 - 9719
dc.identifier.issn 0027-8424
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/3809
dc.description.abstract The effects of climate change on plant and animal populations are widespread and documented for many species in many areas of the world. However, projections of climate impacts will require a better mechanistic understanding of ecological and behavioral responses to climate change and climate variation. For vertebrate animals, there is an absence of whole-system manipulative experiments that express natural variation in predator and prey behaviors. Here we investigate the effect of elevated water temperature on the physiology, behavior, growth, and survival of fish populations in a multiple whole-lake experiment, by using 17 lake-years of data collected over 2 years with differing average temperatures. We found that elevated temperatures in excess of the optimum reduced the scope for growth through reduced maximum consumption and increased metabolism in young rainbow trout, Oncorhynchus mykiss. Increased metabolism at high temperatures resulted in increased feeding activity (consumption) by individuals to compensate and maintain growth rates similar to that observed at cooler (optimum) temperatures. However, greater feeding activity rates resulted in greater vulnerability to predators that reduced survival to only half that of the cooler year. Our work therefore identifies temperature-dependent physiology and compensatory feeding behavior as proximate mechanisms for substantial climate-induced mortality in fish populations at the scale of entire populations and waterbodies. © 2007 by The National Academy of Sciences of the USA.
dc.language eng
dc.relation.isbasedon 10.1073/pnas.0701638104
dc.title Mechanisms for climate-induced mortality of fish populations in whole-lake experiments
dc.type Journal Article
dc.description.version Published
dc.parent Proceedings of the National Academy of Sciences of the United States of America
dc.journal.volume 23
dc.journal.volume 104
dc.journal.number 23 en_US
dc.publocation Washington DC, USA en_US
dc.identifier.startpage 9715 en_US
dc.identifier.endpage 9719 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0602 Ecology
dc.personcode 940138
dc.personcode 997647
dc.percentage 100 en_US
dc.classification.name Ecology en_US
dc.classification.type FOR-08 en_US
dc.description.keywords Behavior
dc.description.keywords Growth
dc.description.keywords Temperature
dc.description.keywords Trade off
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - Environmental Science
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true
utslib.collection.history School of the Environment (ID: 344)
utslib.collection.history Closed (ID: 3)
utslib.collection.history School of the Environment (ID: 344)
utslib.collection.history School of the Environment (ID: 344)


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