Effects of lake warming on behavioural thermoregulatory tactics in a cold-water stenothermic fish.

ABSTRACT: Despite some evidence of within-population phenotypic variation in fish thermal behaviour, the occurrence of alternative tactics of this behaviour is rarely explicitly considered when studying natural populations. Brook charr provide an example of within-population variability in behavioural thermoregulation as revealed by a recent study on a lacustrine population of this species. The objectives of the present study were (i) to determine the influence of natural variability in the lake's thermal profiles on the expression of thermoregulatory tactics, and (ii) to determine the vertical and horizontal movements of individuals at different periods of the day to better understand the spatio-temporal behaviour associated with each thermoregulatory tactic. During summer 2010, 30 adult brook char

SUBMITTER: Goyer K 

PROVIDER: S-EPMC3963910 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature