State-dependent behavior and alternative behavioral strategies in brown trout (Salmo trutta L.) fry.

ABSTRACT:

Abstract

Animals generally adjust their behavior in response to bodily state (e.g., size and energy reserves) to optimize energy intake in relation to mortality risk, weighing predation probability against the risk of starvation. Here, we investigated whether brown trout Salmo trutta adjust their behavior in relation to energetic status and body size during a major early-life selection bottleneck, when fast growth is important. Over two consecutive time periods (P1 and P2; 12 and 23 days, respectively), food availability was manipulated, using four different combinations of high (H) and low (L) rations (i.e., HH, HL, LH, and LL; first and second letter denoting ration during P1 and P2, respectively). Social effects were excluded through individual isolation. Following the tr

SUBMITTER: Naslund J 

PROVIDER: S-EPMC5102978 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature