Project 2785: T. Claverie, S.N. Patek. 2013. Modularity and rates of evolutionary change in a power-amplified prey capture system. Evolution. 67 (11):3191-3207.
Specimen: Altosquilla soelae (Sydney/P.57941 (1))
View: dactylus_lateral

Abstract

The dynamic interplay among structure, function, and phylogeny form a classic triad of influences on the patterns and processes of biological diversification. Although these dynamics are widely recognized as important, quantitative analyses of their interactions have infrequently been applied to biomechanical systems. Here we analyze these factors using a fundamental biomechanical mechanism: power amplification. Power‐amplified systems use springs and latches to generate extremely fast and powerful movements. This study focuses specifically on the power amplification mechanism in the fast raptorial appendages of mantis shrimp (Crustacea: Stomatopoda). Using geometric morphometric and phylogenetic comparative analyses, we measured evolutionary modularity and rates of morphological evolution of the raptorial appendage's biomechanical components. We found that “smashers” (hammer‐shaped raptorial appendages) exhibit lower modularity and 10‐fold slower rates of morphological change when compared to non‐smashers (spear‐shaped or undifferentiated appendages). The morphological and biomechanical integration of this system at a macroevolutionary scale and the presence of variable rates of evolution reveal a balance between structural constraints, functional variation, and the “roles of development and genetics” in evolutionary diversification.


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Article DOI: https://doi.org/10.1111/evo.12185

Project DOI: 10.7934/P2785, http://dx.doi.org/10.7934/P2785
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    member name taxa specimens media media
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    Grace Farley
    Project Administrator
    Last logged in 11/21/18
    89411461224
    Thomas Claverie
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    Sheila Patek
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    Last logged in 11/21/18
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