Fluctuating asymmetry and sexual performance in the drumming wolf spider Hygrolycosa rubrofasciata

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dc.contributor.author Ahtiainen, J.
dc.contributor.author Alatalo, R. V.
dc.contributor.author Mappes, J.
dc.contributor.author Vertainen, L.
dc.date.accessioned 2011-05-19T08:32:00Z
dc.date.available 2011-05-19T08:32:00Z
dc.date.issued 2003
dc.identifier.citation Ahtiainen J., Alatalo R.V., Mappes J. & Vertainen, L. 2003: Fluctuating asymmetry and sexual performance in the drumming spider Hygrolycosa rubrofasciata. Annales Zoology Fennici 40: 281-292.
dc.identifier.issn 0003-455X
dc.identifier.uri http://hdl.handle.net/123456789/27039
dc.description.abstract Recently, there has been much interest in estimating fluctuating asymmetry (FA) of morphological traits as a short-cut measure of individual quality. FA deals with small differences around the symmetry value of zero. Thus, measurement error is often relatively large. However, repeated measurements. and large sample sizes allow reliable estimates of FA that can be corrected for errors. The purpose of this study was two-fold: at the biological level, we examined with a large sample size (N = 804) whether pedipalp FA could be used as a short-cut measure, of individual quality in the wolf spider Hygrolycosa rubrofasciata. This was done by estimating how strongly FA correlates with male sexual performance, i.e. drumming rate and mobility. At the statistical level, we examined how the deflating effect of measurement error could be eliminated to get unbiased correlations between FA and any repeatable trait. We also examined which is the more economical way to get accurate population-level estimates of FA-trait associations, to increase sample size or the number of within-subject repeats. Our results show that there was a very weak, but significant negative relationship between pedipalp FA and mobility (Kendall's partial r(k) = -0.086). However, this value inevitably underestimates the true relationship, given the large measurement error. It is possible to estimate the unbiased relationship by correcting the above correlation coefficient with effective reliability estimates of both FA and sexual performance. After the correction, the unbiased relationship between FA and mobility was r = -0.183. Our results indicate that FA is weakly related to male sexual performance in H. rubrofasciata. Our results also show that leptokurtosis, which is characteristic of signed FA distributions, was entirely caused by 17 outlier individuals. This indicates that large sample sizes are important to illustrate the true between-individual heterogeneity in FA. Furthermore, our power analysis indicates that it pays to measure more individuals than to increase the number-of within-subject repeats to obtain accurate population-level estimates of FA-trait associations. en
dc.language.iso eng
dc.publisher Finnish Zoological and Botanical Publishing Board
dc.relation.ispartofseries Annales Zoologici Fennici
dc.relation.uri http://www.sekj.org/AnnZool.html
dc.rights © Finnish Zoological and Botanical Publishing Board
dc.subject.other sexual selection en
dc.subject.other ecology en
dc.title Fluctuating asymmetry and sexual performance in the drumming wolf spider Hygrolycosa rubrofasciata
dc.type Article en
dc.identifier.urn URN:NBN:fi:jyu-2011051910878
dc.subject.kota 118
dc.contributor.laitos Bio- ja ympäristötieteiden laitos fi
dc.contributor.laitos Department of Biological and Environmental Science en
dc.type.uri http://purl.org/eprint/type/JournalArticle
dc.description.version Published PDF
eprint.status http://purl.org/eprint/type/status/PeerReviewed

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