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Sexual Size Dimorphism and Assortative Mating in the Obligate Coral Commensal Trapezia Ferr Uginea Latreille (Decapoda, Xanthidae)

Sexual Size Dimorphism and Assortative Mating in the Obligate Coral Commensal Trapezia Ferr... SEXUAL SIZE DIMORPHISM AND ASSORTATIVE MATING IN THE OBLIGATE CORAL COMMENSAL TRAPEZIA FERR UGINEA LATREILLE (DECAPODA, XANTHIDAE) BY JONATHAN ADAMS Department of Zoology, The University, Newcastle-upon-Tyne NE1 7RU, U.K. ALASDAIR J. EDWARDS Dove Marine Laboratory, Cullercoats, Tyne and Wear NE30 4PZ, U.K. and HILARY EMBERTON 16, Russell Hill, Purley, Surrey, U.K. INTRODUCTION Among crabs it is generally true that males are larger than females. There are, however, important exceptions such as the Hapalocarcinidae (Utinomi, 1944). Sexual dimorphism is sometimes strongly defined with exceptional post- pubertal allometric growth of the male chelipeds (Hartnoll, 1974, 1978) which becomes most elaborate amongst the fiddler crabs Uca (Crane, 1975) and Oxyrhyncha (Ingle, 1980). Thus, the Brachyura differ from other groups of Crustacea where females are generally larger than males (e.g., Copepoda: Bayly, 1978; Geddes & Cole, 1981). Among the Malacostraca there are numerous, well documented examples both of relatively large males (e. g., Gammarus spp. ) and relatively large females (e.g., Crangonyx spp.). Recently, it has been shown that males of the freshwater amphipod Gammarus pulex (Linnaeus) are not merely larger than females but that mating is assortative: males are typically 1.3 times the length of females in pre-copula pairs (Birkhead & http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crustaceana Brill

Sexual Size Dimorphism and Assortative Mating in the Obligate Coral Commensal Trapezia Ferr Uginea Latreille (Decapoda, Xanthidae)

Emberton, Hilary; Adams, Jonathan; Edwards, Alasdair J.
Crustaceana , Volume 48 (1-3): 188 – Jan 1, 1985
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Publisher
Brill
Copyright
© 1985 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0011-216x
eISSN
1568-5403
DOI
10.1163/156854085X00882
Publisher site
See Article on Publisher Site

Abstract

SEXUAL SIZE DIMORPHISM AND ASSORTATIVE MATING IN THE OBLIGATE CORAL COMMENSAL TRAPEZIA FERR UGINEA LATREILLE (DECAPODA, XANTHIDAE) BY JONATHAN ADAMS Department of Zoology, The University, Newcastle-upon-Tyne NE1 7RU, U.K. ALASDAIR J. EDWARDS Dove Marine Laboratory, Cullercoats, Tyne and Wear NE30 4PZ, U.K. and HILARY EMBERTON 16, Russell Hill, Purley, Surrey, U.K. INTRODUCTION Among crabs it is generally true that males are larger than females. There are, however, important exceptions such as the Hapalocarcinidae (Utinomi, 1944). Sexual dimorphism is sometimes strongly defined with exceptional post- pubertal allometric growth of the male chelipeds (Hartnoll, 1974, 1978) which becomes most elaborate amongst the fiddler crabs Uca (Crane, 1975) and Oxyrhyncha (Ingle, 1980). Thus, the Brachyura differ from other groups of Crustacea where females are generally larger than males (e.g., Copepoda: Bayly, 1978; Geddes & Cole, 1981). Among the Malacostraca there are numerous, well documented examples both of relatively large males (e. g., Gammarus spp. ) and relatively large females (e.g., Crangonyx spp.). Recently, it has been shown that males of the freshwater amphipod Gammarus pulex (Linnaeus) are not merely larger than females but that mating is assortative: males are typically 1.3 times the length of females in pre-copula pairs (Birkhead &

Journal

Crustaceana – Brill

Published: Jan 1, 1985

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