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Senescence rates are determined by ranking on the fast-slow life-history continuum.

Jones, O. R. and Gaillard, J. M. and Tuljapurkar, S. and Alho, J. S. and Armitage, K. B. and Becker, P. H. and Bize, P. and Brommer, J. and Charmantier, A. and Charpentier, M. and Clutton-Brock, T. and Dobson, F. S. and Festa-Bianchet, M. and Gustafsson, L. and Jensen, H. and Jones, C. G. and Lillandt, B. G. and McCleery, R. and Merila, J. and Neuhaus, P. and Nicoll, M. A. C. and Norris, K. and Oli, M. K. and Pemberton, J. and Pietiainen, H. and Ringsby, T. H. and Roulin, A. and Saether, B. E. and Setchell, J. M. and Sheldon, B. C. and Thompson, P. M. and Weimerskirch, H. and Wickings, E. J. and Coulson, T. (2008) 'Senescence rates are determined by ranking on the fast-slow life-history continuum.', Ecology letters., 11 (7). pp. 664-673.

Abstract

Comparative analyses of survival senescence by using life tables have identified generalizations including the observation that mammals senesce faster than similar-sized birds. These generalizations have been challenged because of limitations of life-table approaches and the growing appreciation that senescence is more than an increasing probability of death. Without using life tables, we examine senescence rates in annual individual fitness using 20 individual-based data sets of terrestrial vertebrates with contrasting life histories and body size. We find that senescence is widespread in the wild and equally likely to occur in survival and reproduction. Additionally, mammals senesce faster than birds because they have a faster life history for a given body size. By allowing us to disentangle the effects of two major fitness components our methods allow an assessment of the robustness of the prevalent life-table approach. Focusing on one aspect of life history - survival or recruitment - can provide reliable information on overall senescence.

Item Type:Article
Keywords:Aging, Comparative analysis, Demography, Generation time, Metabolic rate, Senescence.
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1111/j.1461-0248.2008.01187.x
Record Created:02 Oct 2009 17:05
Last Modified:25 Jan 2010 08:51

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