Ghoul Ecology

Ghoul Ecology is a perk added to Fallout 3 in the Point Lookout add-on.

Obtaining
The perk is gained by reading Plik's journal inside the Coastal Grotto.

Glitch
It seems this perk causes a major increase in damage to all your weapons. For example, I had Eugene that did 110 damage, then I got the perk, and now Eugene does 260 damage.