Why does offspring size affect performance? Integrating metabolic scaling with life-history theory

Pettersen, Amanda K., White, Craig R. and Marshall, Dustin J. (2015) Why does offspring size affect performance? Integrating metabolic scaling with life-history theory. Proceedings of the Royal Society B: Biological Sciences, 282 1819: 1-9. doi:10.1098/rspb.2015.1946


Author Pettersen, Amanda K.
White, Craig R.
Marshall, Dustin J.
Title Why does offspring size affect performance? Integrating metabolic scaling with life-history theory
Journal name Proceedings of the Royal Society B: Biological Sciences   Check publisher's open access policy
ISSN 1471-2954
0962-8452
Publication date 2015-11-11
Sub-type Article (original research)
DOI 10.1098/rspb.2015.1946
Open Access Status Not Open Access
Volume 282
Issue 1819
Start page 1
End page 9
Total pages 9
Place of publication London, United Kingdom
Publisher Royal Society of London
Collection year 2016
Language eng
Abstract Within species, larger offspring typically outperform smaller offspring. While the relationship between offspring size and performance is ubiquitous, the cause of this relationship remains elusive. By linking metabolic and life-history theory, we provide a general explanation for why larger offspring perform better than smaller offspring. Using high-throughput respirometry arrays, we link metabolic rate to offspring size in two species of marine bryozoan. We found that metabolism scales allometrically with offspring size in both species: while larger offspring use absolutely more energy than smaller offspring, larger offspring use proportionally less of their maternally derived energy throughout the dependent, non-feeding phase. The increased metabolic efficiency of larger offspring while dependent on maternal investment may explain offspring size effects—larger offspring reach nutritional independence (feed for themselves) with a higher proportion of energy relative to structure than smaller offspring. These findings offer a potentially universal explanation for why larger offspring tend to perform better than smaller offspring but studies on other taxa are needed.
Keyword Allometry
Egg size
Maternal effect
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 1 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 01 Dec 2015, 00:24:30 EST by System User on behalf of Scholarly Communication and Digitisation Service