Imposed Non-Reproduction? It is really a stupid excuse to say that in some species most males don’t mate because the alleged Alpha male doesn’t allow them to. Because we all know that sexuality is such a strong drive that mere violence can’t stop it. I mean there are so many males and females around in these temporary packs, while only the alpha male and female mate. So the rest of the gang can easily sneak up on the alpha-male and do some mating if they want. Clearly, they are not interested.