Differential male mating frequency depending on male number in the migratory locust
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Experimental crosses with and without risk of sperm competition were performed in the locust Locusta migratoria, an orthopteran species with a certain degree of first male sperm precedence. The results showed that first mating males perform a significantly higher number of matings than non-first ones, which is paralleled to a shorter remating period. Possible explanations of this differential male mating frequency are discussed in the light of current hypotheses on sexual selection theory.
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A. J. Castro, Departamento de Genitica, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain. E-mail: firstname.lastname@example.org