期刊
JOURNAL OF EVOLUTIONARY BIOLOGY
卷 25, 期 1, 页码 130-137出版社
WILEY
DOI: 10.1111/j.1420-9101.2011.02411.x
关键词
extended phenotype; path modelling; performance traits; sexual selection
资金
- Mountain Lake Biological Station
- University of Virginia
- Swarthmore College Biology Department
- NSF [DBI-0453380]
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1005104] Funding Source: National Science Foundation
Social networks describe the pattern of intraspecific interactions within a population. An individuals position in a social network often is expected to influence its fitness, but only a few studies have examined this relationship in natural populations. We investigated the fitness consequences of network position in a wild beetle population. Copulation success of male beetles positively covaried with strength (a measure of network centrality) and negatively covaried with clustering coefficient (CC) (a measure of cliquishness). Further analysis using mediation path models suggested that the activity level of individuals drove the relationships between strength and fitness almost entirely. In contrast, selection on CC was not explained by individual behaviours. Although our data suggest that social network position can experience strong sexual selection, it is also clear that the relationships between fitness and some network metrics merely reflect variation in individual-level behaviours.
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