Effects of Intermittent Exercise during Initial Rainbow Trout Oncorhynchus mykiss Rearing in Tanks Containing Vertically-Suspended Environmental Enrichment

Occupational enrichment is a category of environmental enrichment including exercise [5]. Fish are typically forced to exercise by increasing water velocities [9-11], which has generally been associated with increased fish growth. However, when fish are over-exercised, fatigue and reduced rearing performance can occur [12,13]. Most exercise studies start with relatively larger and older salmonids [2,3,9,14-16]. Beginning an exercise routine at initial feeding has not occurred.