Juvenile trout behavior in relation to piscivores, surface ice and light ...

• Main Authors: Greenberg, Larry, Jonsson, Bror, Bergman, Eva, Österling, Martin, Watz, Johan, Filipsson, Karl
• Format: Dataset
• Language: unknown
• Published: figshare 2023
• Subjects: Behavioural ecology; Freshwater ecology; Karlstad; Burbot; Lota lota; lota
• Online Access: https://dx.doi.org/10.6084/m9.figshare.24125931; https://figshare.com/articles/dataset/Juvenile_trout_behavior_in_relation_to_piscivores_surface_ice_and_light/24125931

These are data for the behavior of juvenile brown trout ( Salmo trutta ) when subjected to the threat of predation from piscivorous fishes at 4 C ("winter") in artificial flumes. There were three predator treatments (burbot Lota lota present, northern pike Esox niger present, no predator present), two light levels (dark, light) and two conditions for surface ice cover (surface ice present, surface ice absent).We captured 76 juvenile brown trout (12 yearling and 64 one-year-old fish) in late September 2020, by electrofishing in the forest stream, Barlingshultsälven, Sweden (59°31.356'N 12°18.728'E). The fish were subsequently transported to the aquarium facility at Karlstad University and kept in four 200 L aquaria (~20 trout in each aquarium). Trout were acclimated to aquarium conditions for approximately 4 months before the experiment commenced. Water in the aquaria was constantly filtered (EHEIM 2217 Classic canister filter; Eheim GmbH & Co KG) and cooled (Teco TK 2000, Teco), and 25 % of the water in ...