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Dimorphism and the Functional Basis of Claw Strength in Six Brachyuran Crabs by Steve C. Schenk; Peter C. Wainwright is a Environmental Science article available to read on EtoBox.

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## Abstract By examining the morphological basis of force generation in the chelae (claws) of both molluscivorous and non‐molluscivorous crabs, it is possible to understand better the difference between general crab claw design and the morphology associated with durophagy. This comparative study investigates the morphology underlying claw force production and intraspecific claw dimorphism in six brachyuran crabs: __Callinectes sapidus__ (Portunidae), __Libinia emarginata__ (Majidae), __Ocypode quadrata__ (Ocypodidae), __Menippe mercenaria__ (Xanthidae), __Panopeus herbstii__ (Xanthidae), and __P. obesus__ (Xanthidae). The crushers of the three molluscivorous xanthids consistently proved to be morphologically ‘strong,’ having largest mechanical advantages (MAs), mean angles of pinnation (MAPs), and physiological cross‐sectional areas (PCSAs). However, some patterns of variation (e.g. low MA in __C. sapidus__, indistinguishable force generation potential in the xanthids) suggested that a quantitative assessment of occlusion and dentition is needed to understand fully the relationship between force generation and diet. Interspecific differences in force generation potential seemed mai

Who reads Dimorphism and the Functional Basis of Claw Strength in Six Brachyuran Crabs?

Author

Steve C. Schenk; Peter C. Wainwright

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Wiley-Blackwell; Wiley (ISSN 0952-8369)

Published

2001

Language

EN

Field

Environmental Science (Physical Sciences)