Abstract
In large lakes, burbot Lota lota utilize several habitats during their ontogenesis. While juveniles are typically littoral dwellers, adults often prefer the cold profundal waters, especially during the summer months. Such distinct seasonal or ontogenetic habitat shifts are often induced by proximate abiotic factors that guide the fish toward another habitat in which either physiological performance is optimized or survival is increased. Temperature is often considered to be such a factor, especially in cold-stenothermal species. In thermal gradient experiments, the effects of the acclimation temperature (AT) on the preferred temperature (PT) and the critical thermal maximum and minimum of burbot were studied. A significant nonlinear relationship was found between PT and AT in small (10−20 cm total length) burbot (SEs in parentheses): PT = −2.1363 (±0.5455) AT + 0.0732 (±0.0207) AT2 + 26.2708 (±3.2075). The final temperature preferendum was 11.4°C. For large (20−30 cm) burbot, no such relationship...

This publication has 36 references indexed in Scilit: