Changes in the Ratio of Rheoreaction Types during Fish Starvation

Changes in the motivational component of rheoreaction (the ratio types) during starvation some fish species has been analyzed. The presence motivation to migrate (before starvation) is major pattern future changes resulting from starvation. All families Cyprinidae and Salmonidae studied with initially behavior as resident individuals show same type response Their preference for currentwise movement increases on 2nd–5th days starvation, then against current 7th–12th days, types approaches initial one. Juveniles Black Sea salmon (Salmo trutta labrax) a downstream migration, represent different starvation: monotonically increased two after