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.

Note
All your weapons will also do an additional 5% in damage against Ghouls.

Glitched?
Some players have reported select weapons greatly increasing in damage after receiving this perk. A fully repaired Eugene with 100 big guns skill was raised from 110 damage to 255. Similar effects happened to the Flamer, Chinese Assault Rifle, and Gatling Laser.