Well, if you look at Africa, which probably has the largest population living in rough conditions, and there's a lot of habitat destruction for firewood for cooking fires and generally any animal that can be caught goes into the pot. Sure, there's poaching for precious material like ivory, but there's also poaching simply to not starve.
This is something to consider with the widespread ranching of cattle- we want our meat, so it's either a matter of raising it ourselves with a few sets of monolithic species where we manage to use the bulk of the carcass for something, or catching wild animals where we don't fully utilize the animal and leave a lot of waste. Right now, by mass, Beef if the dominant life form on the planet.