Movement and summer habitat of brown trout (Salmo trutta) below a pulsed discharge hydroelectric generating station

Bunt, Christopher M.; Cooke, Steven J.; Katopodis, C.; McKinley, R. S.

doi:10.1002/(sici)1099-1646(199909/10)15:5<395::aid-rrr556>3.3.co;2-t

Cited by 50 publications

(74 citation statements)

References 23 publications

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“…Numerous field studies found no consistent effect of sudden, extreme peaking flows (ranging from 0.15 to [200 m 3 s -1 ) on area use or movements by adult trout and salmon (Bunt et al 1999;Gido et al 2000;Heggenes et al 2007;Scruton et al 2005). Similarly, domestic rainbow trout in the South Fork American River (California USA), with SL [ 25 cm, were not forced downstream by daily pulsed flow increases from 5 to [40 m 3 s -1 .…”

Section: Downstream Displacementsupporting

confidence: 90%

Hydropower-related pulsed-flow impacts on stream fishes: a brief review, conceptual model, knowledge gaps, and research needs

Young

Cech

Thompson

2011

Rev Fish Biol Fisheries

193

221

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The societal benefits of hydropower systems (e.g., relatively clean electrical power, water supply, flood control, and recreation) come with a cost to native stream fishes. We reviewed and synthesized the literature on hydropower-related pulsed flows to guide resource managers in addressing significant impacts while avoiding unnecessary curtailment of hydropower operations. Dams may release pulsed flows in response to needs for peaking power, recreational flows, reservoir storage adjustment for flood control, or to mimic natural peaks in the hydrograph. Depending on timing, frequency, duration, and magnitude, pulsed flows can have adverse or beneficial short and long-term effects on resident or migratory stream fishes. Adverse effects include direct impacts to fish populations due to (1) stranding of fishes along the changing channel margins, (2) downstream displacement of fishes, and (3) reduced spawning and rearing success due to redd/nest dewatering and untimely or obstructed migration. Beneficial effects include: (1) maintenance of habitat for spawning and rearing, and (2) biological cues to trigger spawning, hatching, and migration. We developed a basic conceptual model to predict the effects of different types of pulsed flow, identified gaps in knowledge, and identified research activities to address these gaps. There is a clear need for a quantitative framework incorporating mathematical representations of field and laboratory results on flow, temperature, habitat structure, fish life stages by season, fish population dynamics, and multiple fish species, which can be used to predict outcomes and design mitigation strategies in other regulated streams experiencing pulsed flows.

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Section: Downstream Displacementsupporting

confidence: 90%

Hydropower-related pulsed-flow impacts on stream fishes: a brief review, conceptual model, knowledge gaps, and research needs

Young

Cech

Thompson

2011

Rev Fish Biol Fisheries

193

221

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“…Flow was varied according to the experimental design and fish locations were determined through manual tracking with a sequential scanning receiver (Lotek Model SRX_400) and a hand-held H-or dip antennae. The general location of each fish was initially determined from the river bank (H-antennae) and the precise location of each fish was then determined using a dip antennae (stripped coaxial cable) and receiver at reduced gain (Bunt et al, 1999). The precise location was verified visually using a viewing tube or by snorkelling (the antenna on the transmitter made visual confirmation fairly easy).…”

Section: Fish Trackingsupporting

confidence: 65%

A synopsis of ‘hydropeaking’ studies on the response of juvenile Atlantic salmon to experimental flow alteration

et al. 2008

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In insular Newfoundland, Canada, studies were conducted from 1999 to 2003 on the effects of 'simulated' hydropeaking power generation on juvenile Atlantic salmon (Salmo salar). In 1999, Atlantic salmon parr were released into an experimental reach below a hydroelectric facility and flow was manipulated over a range of discharge (1.0-4.2 m 3 s -1 ) during a series of 'experiments' simulating hydropeaking in both summer and fall. Fish were implanted with radio transmitters, manually tracked, precisely located (±1 m), habitat selection evaluated, and movement response determined. Experiments were continued in 2002 and 2003 to contrast response of salmon between summer and winter, the magnitude of flow changes were greater (0.7-5.2 m 3 s -1 ) and changes were made more rapidly (instantly). As discharge was increased, velocity and depth use by parr increased, and fish adapted behaviourally by increased contact with the substrate. Salmon parr also exhibited two distinct movement patterns in the summer and fall of 1999 studies; high site fidelity or considerable movement during trials. Salmon were more mobile during both static and dynamic flow conditions and throughout the diel cycle in the summer of 2002 experiment, and 2 fish were stranded and died, the only time this happened in the four series of experiments. Within each experiment generally there were no differences between movements at static high and low flows for day and night movements, with one exception, and night time movements were always greatest, again with one exception. During dynamic flow changes, within each experiment, distances moved during down ramping and up ramping were not significantly different except in the summer of 1999. Overall, comparing between experiments for up and down ramping events, distances moved in the summer of 2002 were statistically higher than for all other experiments. Not surprisingly, the home ranges of fish in the summer of 2002 were also the greatest while the smallest home ranges were in the winter of 2003. Results suggest hydropeaking regimes may be energetically costly potentially affecting over-winter survival which is related to energy reserves obtained during summer. Collectively these studies provide comprehensive information on the response of juvenile Atlantic salmon parr to hydropeaking, on both diel and seasonal scales, and will assist hydro producers and regulators design and operate hydropeaking regimes to minimize ecological impact.

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“…Suggested causal mechanisms are linked to environmental heterogeneity, i.e. not only abiotic factors such as habitat (Young 1994;Ovidio et al 2002;Diana et al 2004), and water flow (Bunt, Cooke, Katopodis & McKinley 1999;Brown, Power & Beltaos 2001), light intensity (Clapp et al 1990;Young 1999;Ho¨jesjo¨et al 2007), and temperature (Clapp et al 1990;Young 1999), but also biotic factors (food availability and foraging tactics : Jenkins 1969;Clapp et al 1990;Kreivi et al 1999;Young 1999;Giroux et al 2000;Ovidio et al 2002;competition: Jenkins 1969;Ho¨jesjo¨et al 2007;anti-predator behaviour: Young 1999). In winter, studies of trout activity and movement patterns are even less consistent.…”

Section: Introductionmentioning

confidence: 99%

Movements by wild brown trout in a boreal river: response to habitat and flow contrasts

Heggenes¹,

Omholt²,

Kristiansen³

et al. 2007

Fisheries Management Eco

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Radio transmitters were implanted in wild brown trout, Salmo trutta L., in the River Ma˚na at low summer water flows (n = 18), higher flow in summer (n = 20), and variable, peaking flows in autumn (n = 20), and tracked two to four times day and night for 4-5 weeks. Individuals were caught and released in a 4-km uniformly channelised section, and in a 4-km natural diverse river section. Substantial individual variation in home range and total movement (924-85 818 m 2 and 295-7014 m) suggested flexibility to adapt to local environmental conditions. Fish were stationary most of the time (median movement 0 m), but some individuals undertook few and apparently sporadic longer movements, sometimes involving shifts in home range. No consistent diurnal pattern in movements was found. Trout in the uniform habitat section appeared to have larger home ranges and moved more than trout in the natural section. Differences were, however, not statistically significant in most comparisons, due to large individual variation. Similarly, larger home ranges and movements between trials related to higher flow were found, but differences were generally not significant. No consistent effects of sudden, extreme peaking flows on area use or movements by the brown trout were observed. K E Y W O R D S : brown trout, habitat, movement, stream, telemetry, water flow.

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Movement and summer habitat of brown trout (Salmo trutta) below a pulsed discharge hydroelectric generating station

Cited by 50 publications

References 23 publications

Hydropower-related pulsed-flow impacts on stream fishes: a brief review, conceptual model, knowledge gaps, and research needs

Hydropower-related pulsed-flow impacts on stream fishes: a brief review, conceptual model, knowledge gaps, and research needs

A synopsis of ‘hydropeaking’ studies on the response of juvenile Atlantic salmon to experimental flow alteration

Movements by wild brown trout in a boreal river: response to habitat and flow contrasts

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