Document Detail


Density affects mating mode and large male mating advantage in a fiddler crab.
MedLine Citation:
PMID:  20931233     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Fiddler crabs show two different mating modes: either females search and crabs mate underground in male burrows, or males search and crabs mate on the surface near female burrows. We explored the relationship between crab density, body size, the searching behavior of both sexes, and the occurrence of both mating modes in the fiddler crab Uca uruguayensis. We found that crabs change their mating mode depending on their size and crab density. Crabs mated mostly on the surface at low densities, and underground at high densities. The proportion of wandering receptive females but not courting males accounted for the variation in mating modes. This suggests that whether crabs mate underground (or on the surface) is determined by the presence (or absence) of searching females. We found that the change in the mating mode affected the level of assortative mating; males mating underground were bigger than those mating on the surface, suggesting active female choice. Given that fiddler crabs experience multiple reproductive cycles, they are prone to showing behavioral plasticity in their mating strategy whenever the payoffs of using different mating modes differ between reproductive events. Our results suggest that the incorporation of different levels of environmental variability may be important in theoretical models aimed at improving our understanding of the evolution of alternative mating tactics and strategies.
Authors:
Pablo D Ribeiro; Pedro Daleo; Oscar O Iribarne
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-10-08
Journal Detail:
Title:  Oecologia     Volume:  164     ISSN:  1432-1939     ISO Abbreviation:  Oecologia     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-11-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0150372     Medline TA:  Oecologia     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  931-41     Citation Subset:  IM    
Affiliation:
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Departamento de Biología, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina. pribeiro@grieta.org.ar
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