Body condition metrics explain fish movement in experimental streams

Body condition refers to an array of physiological or nutritious states in animals, but body is typically measured using a single metric animal behavior studies. In this paper, we conducted three-day laboratory study evaluate whether metrics affected movement wild-caught creek chub (Semotilus atromaculatus) at 16 and 22°C. Movement was counted between two circular tanks connected by straight corridor, which equipped with pair passive integrated transponder antennas. Fish most frequent during periods darkness simulated photoperiod, more mobile individuals consistently moved frequently across the 3 days. general, better were than those poorer condition, different degrees. Specifically, per cent weight loss dry matter content (ratio wet versus dehydrated weight) predictors weight-at-length, used as surrogate animals. addition, length interacted affect fish movement, where smaller significantly that larger individuals. effects on activity similar This demonstrates may not always certain way. need be carefully selected when context behavior, should tested feasible.