Quantification of Libby Reservoir Levels Needed to Maintain or Enhance Reservoir Fisheries, 1990-1994 Investigations of Fish Entrainment Through Libby Dam.

Skaar, Don

doi:10.2172/247290

Cited by 8 publications

(11 citation statements)

References 12 publications

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“…We therefore propose to use burbot from Moyie Lake, British Columbia, which are of the Pacific clade (Powell et al., 2008). However, genetic concerns may be moot because burbot are presently entrained through Libby Dam and migrating from above Kootenai Falls (Skarr et al., 1996), Montana. If suitable spawning conditions can be created, immigrants will add to the reproductive stock and thereby help to restore the original genetic makeup of burbot in the Kootenai River.…”

Section: Discussionmentioning

confidence: 99%

Stocking for rehabilitation of burbot in the Kootenai River, Idaho, USA and British Columbia, Canada

Paragamian

Hansen

2011

Journal of Applied Ichthyology

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SummaryThe burbot Lota lota is widespread globally, but the population in the Kootenai River, Idaho and British Columbia, Canada is at risk of extirpation because of habitat changes caused by operation of Libby Dam in Montana, 100 km upstream of the border with Idaho. We developed an agestructured simulation model to estimate the number of age-0 burbot (fall fingerlings) to stock annually to rebuild the population in the Kootenai River. We found with the estimated annual survival of about 38% that 110 000-900 000 age-0 burbot per year will need to be stocked to rebuild the burbot population in the Kootenai River in 25 years, depending on the rehabilitation goal, either 5500 age-4 burbot and older as an interim goal or 17 000 age-4 and older burbot as an ultimate goal (longer than 250 mm). If survival is higher at 61% then the stocking numbers could range from 12 000 to 35 000 age-0 fingerlings per year. After stocked burbot in the population reach age 4, discharge from Libby Dam must be regulated to provide suitable temperatures and flows during the burbot pre-spawning and spawning periods, to enable the population to reproduce and return to self-sustaining status. Our findings will serve as an example for similar efforts to restore depleted burbot populations elsewhere in the world.

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Section: Discussionmentioning

confidence: 99%

Stocking for rehabilitation of burbot in the Kootenai River, Idaho, USA and British Columbia, Canada

Paragamian

Hansen

2011

Journal of Applied Ichthyology

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“…Nonetheless, we know much less about the numbers of potadromous fish that actually experience entrainment or passage through hydropower turbines (Silva et al., ). Indeed, where entrainment/passage has been quantified, the numbers of juvenile potadromous fish entrained/passing annually at individual facilities can often be very high, ranging from 80,000 to 4.47 million (Dawson & Parkinson, ; FERC, ; Janáč, Jurajda, Kružíková, Roche, & Prášek, ; Navarro, McCauley, & Blystra, ; Skaar, ). In contrast, we were able to find just two estimates of potadromous fish entrainment passage, where Spinelli () estimated that 138,000 rainbow trout ( Onchorynchus mykiss , Salmonidae) and 152,000 walleye ( Sander vitreus , Percidae) were annually entrained through the Hauser Dam.…”

Section: Review Of Evidence For Involuntary Turbine Entrainment and Imentioning

confidence: 99%

Turbine entrainment and passage of potadromous fish through hydropower dams: Developing conceptual frameworks and metrics for moving beyond turbine passage mortality

et al. 2019

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Potadromous fishes are vulnerable to involuntary entrainment through hydropower turbines. However, turbines can also provide a downstream passage route for potadromous fish. Here, we review evidence for turbine entrainment and passage in potadromous fish, and evaluate the effects of these processes on upstream and downstream populations. We develop conceptual frameworks and metrics to quantify vulnerability to turbine entrainment removals, and to quantify the efficiency of turbines as a downstream passage route. We highlight factors that influence these processes and provide case‐studies demonstrating their applicability. We found that juvenile potadromous fish are being entrained through turbines at rates high enough to impact upstream populations. Given that juvenile passage survival is often high, we argue that turbines provide an important downstream passage route for potadromous fish. We show that entrainment vulnerability is likely a function of interactions between in‐reservoir fish behaviour, habitat configuration and operations and thus not well captured by passage mortality estimates. Similarly, we show that while passage mortality can limit downstream passage efficiency, passage success is also dependent on reservoir and forebay navigation, along with survival and fitness in the downstream river. We advocate for a shift in focus away from estimates of passage mortality and injury, which have previously accounted for the majority of turbine passage research. Instead, we recommend an approach that focusses on quantification of the factors that influence downstream passage efficiency and entrainment vulnerability. Moreover, we highlight the need to better understand the broader scale impacts of these events on upstream and downstream populations.

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“…While adult burbot entrainment has been noted (Skaar et al . ; Spence & Neufeld ; Dunnigan & Sinclair ; Spinelli ), burbot‐specific entrainment vulnerability and passage mortality studies are rare (see Martins et al . for an exception).…”

Section: Threats To Reservoir Populationsmentioning

confidence: 99%

Burbot and large hydropower in North America: benefits, threats and research needs for mitigation

Harrison

Gutowsky

Martins

et al. 2016

Fisheries Management Eco

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In North America, burbot Lota lota (L.), interactions with hydropower are common, southern burbot populations are endangered and hydropower has been implicated in the decline. Thus, the objectives of this review were to identify threats and benefits of hydropower to riverine and reservoir dwelling burbot, assess overall impacts and identify key research needs for mitigation. Review findings suggest that while winter hydropower discharge regimes threaten riverine burbot spawning, burbot often successfully exploit reservoir environments. Further, while turbine entrainment has been hypothesised as a factor in the decline of burbot populations, low adult vulnerability to passage and a high resilience to juvenile removals likely mean risk to populations is low. Identified research needs include better definitions of flow and temperature requirements for riverine burbot and a quantification of the potential for reservoirs to act as source populations for downstream impacted zones. This review highlights the Pacific watershed focus of existing work and calls for status assessments and ecological research of burbot in North American Arctic and Atlantic watersheds where large hydropower and burbot interactions are common yet rarely studied.

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Quantification of Libby Reservoir Levels Needed to Maintain or Enhance Reservoir Fisheries, 1990-1994 Investigations of Fish Entrainment Through Libby Dam.

Cited by 8 publications

References 12 publications

Stocking for rehabilitation of burbot in the Kootenai River, Idaho, USA and British Columbia, Canada

Stocking for rehabilitation of burbot in the Kootenai River, Idaho, USA and British Columbia, Canada

Turbine entrainment and passage of potadromous fish through hydropower dams: Developing conceptual frameworks and metrics for moving beyond turbine passage mortality

Burbot and large hydropower in North America: benefits, threats and research needs for mitigation

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