Use of Two Vertically-Suspended Environmental Enrichment Arrays during Rainbow Trout Rearing in Circular Tanks

Abstract

Circular tanks are used for fish rearing because they homogeneously distribute oxygen, provide velocity for fish exercise, and are hydraulically self-cleaning [1-6]. However, they are typically barren, devoid of any internal structures usually found in complex natural environments. Environmental enrichment is the practice of placing structure within hatchery rearing units, or otherwise modifying them to more closely resemble natural habitats.