Biomechanical Diversity of Mating Structures among Harvestmen Species Is Consistent with a Spectrum of Precopulatory Strategies

PloS One
Mercedes M Burns, Jeffrey W Shultz

Abstract

Diversity in reproductive structures is frequently explained by selection acting at individual to generational timescales, but interspecific differences predicted by such models (e.g., female choice or sexual conflict) are often untestable in a phylogenetic framework. An alternative approach focuses on clade- or function-specific hypotheses that predict evolutionary patterns in terms neutral to specific modes of sexual selection. Here we test a hypothesis that diversity of reproductive structures in leiobunine harvestmen (daddy longlegs) of eastern North America reflects two sexually coevolved but non-overlapping precopulatory strategies, a primitive solicitous strategy (females enticed by penis-associated nuptial gifts), and a multiply derived antagonistic strategy (penis exerts mechanical force against armature of the female pregenital opening). Predictions of sexual coevolution and fidelity to precopulatory categories were tested using 10 continuously varying functional traits from 28 species. Multivariate analyses corroborated sexual coevolution but failed to partition species by precopulatory strategy, with multiple methods placing species along a spectrum of mechanical antagonistic potential. These findings suggest that p...Continue Reading

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Citations

Jun 3, 2016·Integrative and Comparative Biology·Diane A Kelly
Jun 3, 2016·Integrative and Comparative Biology·Brandon C MooreDiane A Kelly
Jun 5, 2016·Integrative and Comparative Biology·Mercedes Burns, Nobuo Tsurusaki
Jul 30, 2016·Integrative and Comparative Biology·Diane A Kelly, Brandon C Moore
May 5, 2016·Evolution; International Journal of Organic Evolution·Paul E HopwoodNick J Royle
Mar 11, 2017·Royal Society Open Science·Luis D Verde ArregoitiaManuel Schweizer
Nov 11, 2016·BMC Evolutionary Biology·Matjaž KuntnerMark A Elgar
Aug 18, 2020·Integrative and Comparative Biology·Karachiwalla ZulekhaBurns Mercedes
Jul 24, 2020·Integrative and Comparative Biology·Teri J OrrVirginia Hayssen
Jan 16, 2021·The Journal of Heredity·Tyler A BrownMercedes Burns
Jul 8, 2021·Proceedings. Biological Sciences·Yoko MatsumuraStanislav N Gorb

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Methods Mentioned

BETA
PCAs

Software Mentioned

GraphPad
LDA
pRAs
geiger
pPCA
phylogenetic canonical correlation analysis ( pCCA )
ImageJ
MASS
pCCA
Adobe Photoshop

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