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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Booth, David J. Post, John R. Biro, Peter A. |
| Spatial Coverage | British Columbia |
| Description | Author Affiliation: Biro PA ( Department of Environmental Science and Institute for Water and Environmental Resource Management, University of Technology Sydney, Box 123, Broadway NSW 2007, Australia. peter.biro@uts.edu.au); |
| 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. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 23 |
| Volume Number | 104 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2007-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Energy Metabolism Physiology Feeding Behavior Food Chain Oncorhynchus Mykiss Temperature Animals British Columbia Fresh Water Mortality Population Dynamics Comparative Study Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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