Answer by Rory Young:
In the pride it is the females that mostly hunt. More specifically the killers hunt. These are females who have for one reason or another become adept at hunting. Often because at some stage they were not getting enough food, started hunting themselves and developed the skill.
These killers will take the lead in the hunt and the other females will follow their lead. Interestingly they are not necessarily the most dominant among the females of the pride.
All males on the other hand are perfectly capable of hunting and if they are happen to bump into an opportunity they certainly don’t ignore it. However, when in the pride they spend their time protecting the pride and their territory from would be usurpers and other threats.
The reason that all male lions can hunt is because they are usually chased out of the pride at 18 months to 2 years old. Thereafter they are forced to feed themselves. These nomadic males become very accomplished hunters. Sometimes they will team up with another male for companionship and to increase the chances of both hunting success. The bond also allows them more chance of usurping a pride for themselves.