Keep in mind I'm paraphrasing this from memory but:
"In my main line of work, we breed fruit flies. We noticed that the some of the more aggressive males would fight over a bit of land, plant, whatever, to court females. We wondered what would happen if we only let the aggressive flies breed, and within 10 generations we had flies that were like Hercules (fruit flies breed very fast which is why they are used to study genetics and evolution). We then reintroduced them back to the more natural population of flies. What ended up happening was; while the aggressive flies were busy fighting, the non-aggressive males were hanging out with the females and making babies. The aggression was quickly bred out and after a couple of generations it went back to initial levels. We often hear the phase 'survival of the fittest' in this field of study, but just a reminder that it doesn't always mean what you think it means."
I thought that was an interesting aside that you might enjoy. 
I know basically the same thing happens with salmon as well (and possibly other fish?), smaller males will sneak in and fertilize the roe while the larger ones are fighting
brb, going to write a self-help book for dudes called 13 rules for life advocating that men strengthen themselves by acting like salmon. While the alphas are fighting, the sigma salmon sneaks in and fertilizes the roe!
The documentary called those salmon "satellite males" lol
me irl lol
Brings a new twist to the song Satellite of Love
Beta orbiters as chuds would call them.