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evolutionary ecology, life history, Poecilia
Poster 2nd Place Award Winner
Poeciliids, such as the species Alfaro cultratus, have a unique reproductive system in which males internally fertilize females, which facilitates competition between males. This takes the form of two strategies:
- Court females
- Chase away small males
- Have a higher number of successful mating attempts
- Allocate less energy to reproductive organs, i.e. gonads and gonopodium
- Can’t mate with as many females
- Attempt sneak copulations, often unsuccessful
- Allocate more energy to reproductive organs, i.e. gonads and gonopodium
These alternative mating strategies can be seen with regressions between gonad and body mass, or gonopodium length and body length. Alfaro may display this shift in reproductive strategy, but it has never been studied in this species.
BYU ScholarsArchive Citation
Mueller, Kaeli; Golden, Kaitlyn; and Johnson, Jerry PhD, "New Evidence for Alternative Mating Strategies in Alfaro cultratus" (2020). Library/Life Sciences Undergraduate Poster Competition 2020. 27.
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