Broodstock Collection (Big Creek Hatchery, OR)

  1. Adult Chum Salmon are captured and sorted in the Big Creek Hatchery holding pens and euthanized for spawning. (Photos 1. & 2.) 
  2. Prior to spawning, eggs are counted and weighed to calculate fecundity of a portion of female spawners. (Photo 3.)
  3. Males and females are spawned to maximize genetic diversity based on the sex ratio of available adults during a spawning event. (Photo 4.
  4. After spawning, a variety of biological data is recorded for each fish and scale, otolith, and genetic samples are collected. (Photo 5.)