Agonistic Behavior, Social Dominance, and Food Consumption of Brook Trout and Rainbow Trout in a Laboratory Stream
Agonistic behavior and social dominance relationships between similar-sized, wild, adult brook trout (Salvelinus fontinalis) and rainbow trout (Salmo gairdneri) were examined in a laboratory stream. Frequency of movements, aggressive encounters, and consumption of food items by trout when held as single specimens, intraspecific pairs, and interspecific pairs were compared. Rainbow trout were more mobile, aggressive, and successful foragers on drifting prey than brook trout; however, neither species appeared to possess a competitive advantage in establishing social dominance or displacing...
