Primarily, this has been stealing their body fat for various nefarious cannibalistic purposes, or cutting them up and selling their flesh as fried chicharrones.
After 25,000 years, the humans on the ship have split in their evolution with half becoming short-lived childlike tribal people and half becoming cannibalistic animals.
Females may cannibalise cohabiting males, independently of whether the female has had food and females that cannibalise a single male are not more fertile than non-cannibalistic females.
