Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/ele.12800 |
Should mothers provision their offspring equally? A manipulative field test | |
Cameron, Hayley; Monro, Keyne; Marshall, Dustin J. | |
2017-08-01 | |
发表期刊 | ECOLOGY LETTERS
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ISSN | 1461-023X |
EISSN | 1461-0248 |
出版年 | 2017 |
卷号 | 20期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Within-brood variation in offspring size is universal, but its causes are unclear. Theoretical explanations for within-brood variation commonly invoke bet-hedging, although alternatives consider the role of sibling competition. Despite abundant theory, empirical manipulations of within-brood variation in offspring size are rare. Using a field experiment, we investigate the consequences of unequal maternal provisioning for both maternal and offspring fitness in a marine invertebrate. We create experimental broods of siblings with identical mean, but different variance, in offspring size, and different sibling densities. Overall, more-variable broods had higher mean performance than less-variable broods, suggesting benefits of unequal provisioning that arise independently of bet-hedging. Complementarity effects drove these benefits, apparently because offspring-size variation promotes resource partitioning. We suggest that when siblings compete for the same resources, and offspring size affects niche usage, the production of more-variable broods can provide greater fitness returns given the same maternal investment; a process unanticipated by the current theory. |
英文关键词 | bet-hedging complementarity fitness life-history theory maternal provisioning niche partitioning offspring size sibling interactions within-brood variation |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405917500010 |
WOS关键词 | EGG-SIZE ; BUGULA-NERITINA ; SEED SIZE ; LIFE-HISTORY ; ENVIRONMENTAL PREDICTABILITY ; INTRASPECIFIC COMPETITION ; POPULATION VARIATION ; NATURAL-POPULATIONS ; SPATIAL VARIATION ; KIN AGGREGATION |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/31272 |
专题 | 资源环境科学 |
作者单位 | Monash Univ, Ctr Geometr Biol, Sch Biol Sci, Melbourne, Vic 3800, Australia |
推荐引用方式 GB/T 7714 | Cameron, Hayley,Monro, Keyne,Marshall, Dustin J.. Should mothers provision their offspring equally? A manipulative field test[J]. ECOLOGY LETTERS,2017,20(8). |
APA | Cameron, Hayley,Monro, Keyne,&Marshall, Dustin J..(2017).Should mothers provision their offspring equally? A manipulative field test.ECOLOGY LETTERS,20(8). |
MLA | Cameron, Hayley,et al."Should mothers provision their offspring equally? A manipulative field test".ECOLOGY LETTERS 20.8(2017). |
条目包含的文件 | 条目无相关文件。 |
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