Fitness measures in selection analyses: sensitivity to the overall number of offspring produced in a lifetime

Dugdale, H. L., Nouvellet, P., Pope, L. C., Burke, T. and MacDonald, D. W. (2010) Fitness measures in selection analyses: sensitivity to the overall number of offspring produced in a lifetime. Journal of Evolutionary Biology, 23 2: 282-292. doi:10.1111/j.1420-9101.2009.01896.x


Author Dugdale, H. L.
Nouvellet, P.
Pope, L. C.
Burke, T.
MacDonald, D. W.
Title Fitness measures in selection analyses: sensitivity to the overall number of offspring produced in a lifetime
Journal name Journal of Evolutionary Biology   Check publisher's open access policy
ISSN 1010-061X
1420-9101
Publication date 2010-02-01
Year available 2010
Sub-type Article (original research)
DOI 10.1111/j.1420-9101.2009.01896.x
Volume 23
Issue 2
Start page 282
End page 292
Total pages 11
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell Publishing Ltd.
Language eng
Formatted abstract
 Age at first (α) and last (ω) breeding are important life-history traits; however, the direction and strength of selection detected on traits may vary depending on the fitness measure used. We provide the first estimates of lifetime breeding success (LBS) and λind (the population growth rate of an individual) of European badgers Meles meles, by genotyping 915 individuals, sampled over 18 years, for 22 microsatellites. Males are slightly larger than females, and the opportunity for selection was slightly greater for males, as predicted. λind and LBS both performed well in predicting the number of grand-offspring, and both detected selection for a late ω, until the age of eight. Differential selection (S′α) for an early α, however, was only detected using LBS, not with λind. In declining populations (λind < 1) selection favours reproduction later in life, whereas early reproduction is selected in increasing populations (λind > 1). As 41% of badgers were assigned only one offspring (λind < 1), whereas 40% were assigned more than two (λind > 1), this cancelled out S′α measured by λind.0
Keyword Age at first reproduction
Age at last reproduction
Individual fitness
Lifetime Reproductive Success
Microsatellite
Mustelidae
Opportunity for selection
Parentage analysis
Reproductive skew
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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