Fitness consequences of larval traits persist across the metamorphic boundary

Crean, Angela J., Monro, Keyne and Marshall, Dustin J. (2011) Fitness consequences of larval traits persist across the metamorphic boundary. Evolution, 65 11: 3079-3089. doi:10.1111/j.1558-5646.2011.01372.x

Author Crean, Angela J.
Monro, Keyne
Marshall, Dustin J.
Title Fitness consequences of larval traits persist across the metamorphic boundary
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
Publication date 2011-11-01
Sub-type Article (original research)
DOI 10.1111/j.1558-5646.2011.01372.x
Volume 65
Issue 11
Start page 3079
End page 3089
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
Metamorphosis is thought to provide an adaptive decoupling between traits specialized for each life-history stage in species with complex life cycles. However, an increasing number of studies are finding that larval traits can carry-over to influence postmetamorphic performance, suggesting that these life-history stages may not be free to evolve independently of each other. We used a phenotypic selection framework to compare the relative and interactive effects of larval size, time to hatching, and time to settlement on postmetamorphic survival and growth in a marine invertebrate, Styela plicata. Time to hatching was the only larval trait found to be under directional selection, individuals that took more time to hatch into larvae survived better after metamorphosis but grew more slowly. Nonlinear selection was found to act on multivariate trait combinations, once again acting in opposite directions for selection acting via survival and growth. Individuals with above average values of larval traits were most likely to survive, but surviving individuals with intermediate larval traits grew to the largest size. These results demonstrate that larval traits can have multiple, complex fitness consequences that persist across the metamorphic boundary; and thus postmetamorphic selection pressures may constrain the evolution of larval traits.
Keyword Adaptive decoupling
Complex life cycles
Fitness surface
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
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