The behavioural response of juvenile Atlantic salmon (Salmo salar) and brook trout (Salvelinus fontinalis) to experimental hydropeaking on a Newfoundland (Canada) river

摘要: Deregulation of the electric power market globally will lead to increased requirement for electricity on demand resulting in more emphasis 'hydropeaking' generation. A research study was conducted regulated WestSalmon River, Newfoundland, Canada, examine habitat selection and movement juvenile Atlantic salmon (Salmo salar) brook trout (Salvelinus fontinalis) response flow changes related 'experimental' peaking Fish were surgically implanted with microscale radio transmitters, released into an experimental study, discharge experimentally manipulated simulating two scenarios: (i) water storage during day generation at night, a 2 hour transition; (ii) night-time day. Experiments repeated summer fall. tracked throughout diurnal cycle each manipulation precisely positioned two-dimensional space. exhibited distinct patterns movement: fish that showed high site fidelity those moved considerably trials. Both active fall hydropeaking experiments. generally did not move long distances longitudinal fashion than laterally. Salmon greater distances, average, under all conditions both seasons but these differences statistically significant. Brook relation dynamic events (up- down-ramping) steady state flows. Trout also night low conditions. These results assist producers hydroelectricity reduce impacts operations habitat.