Traditional hatcheries raise fish in featureless environments and subject them to dull routines, whereas new, experimental hatcheries raise fish in visually stimulating environments with varied routines  When released into the wild, fish from the experimental hatcheries are bolder than those from traditional hatcheries in exploring new environments and trying new types of food
Fish raised in the experimental hatcheries, ttherefore, are more likely to survive after their release
The quality of the environments into which hatchery-raised fish are released has little effect on the fish's survival rate.