The Evolution of a Female Genital Trait in Butterflies
Author Information
Author(s): Sánchez Víctor, Hernández-Baños Blanca Estela, Cordero Carlos
Primary Institution: Universidad Nacional Autónoma de México
Hypothesis
Thick spermatophore envelopes and signa evolve in polyandrous species, and these adaptations are lost when monandry evolves subsequently.
Conclusion
The study supports the idea that signa are a result of sexually antagonistic coevolution with spermatophore envelopes.
Supporting Evidence
- Monandry evolved eight times, and in five cases, signa were lost.
- 93% of polyandrous taxa have signa compared to only 33.3% of monandrous taxa.
- Preliminary evidence suggests that in some cases, males imposed monandry on females.
Takeaway
This study looks at how female butterflies have special structures to help them break down sperm packages, which helps them mate better.
Methodology
A literature review was conducted to gather data on female mating patterns and the presence of signa across 37 taxa, followed by phylogenetic analysis.
Limitations
The study lacks quantitative data on the thickness of spermatophore envelopes.
Statistical Information
P-Value
p<0.0007
Statistical Significance
p<0.0007
Digital Object Identifier (DOI)
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