Demonstrating sexual selection by cryptic female choice on male genitalia: What is enough?
Evolution
; 73(12): 2415-2435, 2019 12.
Article
em En
| MEDLINE
| ID: mdl-31599962
ABSTRACT
Rapid divergence in external genital structures occurs in nearly all animal groups that practice internal insemination; explaining this pattern is a major challenge in evolutionary biology. The hypothesis that species-specific differences in male genitalia evolved under sexual selection as courtship devices to influence cryptic female choice (CFC) has been slow to be accepted. Doubts may stem from its radical departure from previous ideas, observational difficulties because crucial events occur hidden within the female's body, and alternative hypotheses involving biologically important phenomena such as speciation, sperm competition, and male-female conflicts of interest. We assess the current status of the CFC hypothesis by reviewing data from two groups in which crucial predictions have been especially well-tested, Glossina tsetse flies and Roeseliana (formerly Metrioptera) roeselii bushcrickets. Eighteen CFC predictions have been confirmed in Glossina and 19 in Roeseliana. We found data justifying rejection of alternative hypotheses, but none that contradicted CFC predictions. The number and extent of tests confirming predictions of the CFC hypothesis in these species is greater than that for other generally accepted hypotheses regarding the functions of nongenital structures. By this criterion, it is reasonable to conclude that some genital structures in both groups likely involved sexual selection by CFC.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ortópteros
/
Moscas Tsé-Tsé
/
Evolução Biológica
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Preferência de Acasalamento Animal
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Genitália Masculina
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Evolution
Ano de publicação:
2019
Tipo de documento:
Article