Premating Reproductive Barriers between Hybridising Cricket Species Differing in Their Degree of Polyandry
| Autor: | Joseph Faulks, Tom Tregenza, Rolando Rodríguez-Muñoz, Thor Veen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
Male Sexual Selection Evolutionary Processes Speciation Zoology lcsh:Medicine 010603 evolutionary biology 01 natural sciences Choice Behavior Gene flow Sexual conflict Gryllidae 03 medical and health sciences Sexual Behavior Animal Species Specificity Cricket Genetic algorithm Animals Mating 10. No inequality lcsh:Science Biology Hybridization 030304 developmental biology 0303 health sciences Evolutionary Biology Multidisciplinary biology Animal Behavior Ecology Gryllus bimaculatus Reproduction lcsh:R Reproductive isolation biology.organism_classification Mate choice Hybridization Genetic lcsh:Q Female Research Article |
| Zdroj: | PLoS ONE PLoS ONE, Vol 6, Iss 5, p e19531 (2011) |
| ISSN: | 1932-6203 |
| Popis: | Understanding speciation hinges on understanding how reproductive barriers arise between incompletely isolated populations. Despite their crucial role in speciation, prezygotic barriers are relatively poorly understood and hard to predict. We use two closely related cricket species, Gryllus bimaculatus and G. campestris, to experimentally investigate premating barriers during three sequential mate choice steps. Furthermore, we experimentally show a significant difference in polyandry levels between the two species and subsequently test the hypothesis that females of the more polyandrous species, G. bimaculatus, will be less discriminating against heterospecific males and hence hybridise more readily. During close-range mating behaviour experiments, males showed relatively weak species discrimination but females discriminated very strongly. In line with our predictions, this discrimination is asymmetric, with the more polyandrous G. bimaculatus mating heterospecifically and G. campestris females never mating heterospecifically. Our study shows clear differences in the strength of reproductive isolation during the mate choice process depending on sex and species, which may have important consequences for the evolution of reproductive barriers. |
| Databáze: | OpenAIRE |
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