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THE PREVALENCE OF MALE RIGHT-HANDEDNESS IN THE INDO-WEST PACIFIC FIDDLER CRABS UCA VOCANS (LINNAEUS) AND U. TETRAGONON (HERBST) (DECAPODA: OCYPODIDAE)

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image of Journal of Crustacean Biology

ABSTRACT Right-handedness of the major cheliped was found in 97.3% of 2,784 male specimens of U. vocans from collections of the National Museum of Natural History (U.S. National Museum) and the 1979 R/V ALPHA HELIX expeditions to the western Pacific. A comparable figure of 96.8% right-handedness was obtained for 281 specimens of the rarer U. tetragonon. Since the collections span the known geographical ranges of both species, it would appear that a strong bias for right-handedness is a universal trait for each. The two species are thus an exception to the right-left equality of handedness previously thought to prevail for the genus. Recently published studies provide possible clues to the mechanism for the determination of right-handedness and its functional significance.

Affiliations: 1: Department of Ecology and Behavioral Biology, University of Minnesota, Minneapolis, Minnesota 55455.

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/content/journals/10.1163/1937240x82x00095
1982-01-01
2016-12-11

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