The relationship between offspring size and performance in the sea

Marshall, Dustin J. and Keough, Michael J. (2008) The relationship between offspring size and performance in the sea. The American Naturalist, 171 2: 214-224. doi:10.1086/524954

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Author Marshall, Dustin J.
Keough, Michael J.
Title The relationship between offspring size and performance in the sea
Journal name The American Naturalist   Check publisher's open access policy
ISSN 0003-0147
Publication date 2008-02
Year available 2007
Sub-type Article (original research)
DOI 10.1086/524954
Open Access Status File (Publisher version)
Volume 171
Issue 2
Start page 214
End page 224
Total pages 11
Editor M. C. Whitlock
Place of publication Chicago, IL, United States
Publisher University of Chicago Press
Collection year 2008
Language eng
Subject C1
9608 Flora, Fauna and Biodiversity
0602 Ecology
Abstract The historical focus on offspring size has been to explain variation among populations, but there have been few attempts to determine whether variation is greatest at population scale. Offspring size variation is typically viewed as an adaptive response to changes in the relationship between offspring size and performance, yet direct tests remain elusive. We partitioned natural variation in offspring size for a marine invertebrate, Watersipora subtorquata, at a range of spatial and temporal scales across southeastern Australia, and we estimated the relationship between offspring size and performance at each population and time. There was significant variation in offspring size among populations, but regional differences explained only 25% of the observed variation, suggesting that there should be a greater focus on small‐scale variation in offspring size. We used our data to parameterize an optimality model to generate predictions of offspring size among different populations and times. Differences in the relationship between offspring size and postmetamorphic performance (and therefore changes in size of offspring that were predicted to maximize maternal fitness) among populations and times were associated with differences in offspring sizes among those populations and times. We suggest that interpopulation variation in offspring size can be an adaptive response to local conditions, but the optimal offspring size is surprisingly dynamic.
Keyword egg size
maternal effects
transgenerational plasticity
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2008 Higher Education Research Data Collection
School of Biological Sciences Publications
Ecology Centre Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 48 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 48 times in Scopus Article | Citations
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Created: Thu, 08 May 2008, 11:38:11 EST by Sian Rodgie on behalf of School of Biological Sciences