It means to cut up the animal meat and leave the anima's carcass behind. It would be the same as when you catch a fish and cut off its head, remove the guts, and cut out the meat or filets. But "harvesting" is used for animal. Harvest is typically used to mean when farmers gather crops from the field, but in this moment, it is used to remove meat from an animal.

Hi! This is what I have found out as it interested me as well. harvesting” or “wildlife management” means to kill an animal so as to control a population or an ecosystem.