Fine-scale genetic structuring on Manacus manacus leks
View abstract on PubMed
Summary
This summary is machine-generated.Males may join leks not just to compete, but to help relatives reproduce. This study shows kin selection drives lek formation in white-bearded manakins, boosting inclusive fitness.
Area Of Science
- Evolutionary Biology
- Behavioral Ecology
- Animal Behavior
Background
- Lekking behavior in many species is traditionally viewed as male-male competition for mating opportunities, driven by direct fitness benefits.
- The role of inclusive fitness benefits, particularly kin selection, in the evolution of lekking has been largely overlooked.
- Kin selection theory suggests that males may gain indirect fitness benefits by joining leks, especially if females are attracted to larger aggregations.
Purpose Of The Study
- To investigate the potential role of kin selection in the formation and evolution of lekking behavior.
- To test the hypothesis that males establish themselves on leks where close relatives are present to maximize indirect fitness benefits.
- To examine the genetic structure within leks and its relationship with male mating success.
Main Methods
- Analysis of fine-scale genetic structure within leks of white-bearded manakins (Manacus manacus).
- Assessing female attraction to lek size and its correlation with mating success.
- Investigating the relatedness of males within lekking groups.
Main Results
- White-bearded manakin leks exhibit extraordinary fine-scale genetic structure, with leks composed of clusters of related kin.
- Larger leks are more attractive to females, leading to a higher number of matings.
- Males form groups within leks, suggesting they preferentially associate with relatives.
Conclusions
- The findings support the hypothesis that kin selection plays a significant role in lek formation and evolution.
- Males may establish themselves on leks to enhance the reproductive success of their relatives, thereby maximizing their own inclusive fitness.
- This behavior is consistent with kin-selection theory, where males contribute to the success of kin groups within leks.