Lake Pend Oreille Fishery Recovery Project, 2002 Annual Report.

Maiolie, Melo A.; Harryman, William; Ament, William J.

doi:10.2172/882929

Cited by 5 publications

(9 citation statements)

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“…The water level of LPO is controlled at the outlet by Albeni Falls Dam for flood control, power production and flow augmentation to the Columbia River System. Typically the lake level is maintained at high water pool from June to September, while in the winter it is dropped by up to 3 m (Maiolie et al, 2006). In general, the lake thermally stratifies from late June to September to a depth of approximately 23 m (Caldwell 2010;Falter and Ingman, 2003).…”

Section: Study Sitementioning

confidence: 99%

“…Dux, pers. comm., IDFG Principal Fisheries Biologist, 2010;Maiolie et al, 2006). Similar to other lakes where mysids were introduced , kokanee density in LPO declined rapidly and precipitously (Bowler, 1982;Bowles et al, 1991;Rieman and Bowler 1980), culminating in closure of the commercial and recreational fisheries.…”

Section: Introductionmentioning

confidence: 98%

“…The exact cause for the decline of kokanee in LPO is uncertain, as a combination of factors including alteration in the winter drawdown (Maiolie et al, 2006); an increase in the abundance of lake trout (Hansen et al, 2008); and the establishment of mysids occurred nearly simultaneously (Rieman and Bowler, 1980;Rieman and Falter, 1981). In general, the introduction of mysids delays the appearance of abundant cladocerans in spring, and reduces their overall density (Ashley, et al, 1997;Ellis et al, 2011;Rieman and Falter 1981).…”

Section: Introductionmentioning

confidence: 99%

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The life history characteristics, growth and density of Mysis diluviana in Lake Pend Oreille, Idaho, USA

Caldwell

Wilhelm

2012

Journal of Great Lakes Research

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Section: Study Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The life history characteristics, growth and density of Mysis diluviana in Lake Pend Oreille, Idaho, USA

Caldwell

Wilhelm

2012

Journal of Great Lakes Research

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“…A population-level eggto-fry survival estimate was then used to test whether a higher water level enhanced kokanee incubation success (Maiolie et al 2002). The strategy involved alternating between years of the pre-existing lake elevation (625.1 m) and an experimentally raised elevation (626.4 m).…”

Section: Introductionmentioning

confidence: 99%

“…The strategy involved alternating between years of the pre-existing lake elevation (625.1 m) and an experimentally raised elevation (626.4 m). If low densities were not enough, unpredictable flooding during the study also caused unknown entrainment losses of fry and adult kokanee, leading to additional uncertainty in one of the annual survival estimates (Maiolie et al 2002). The egg-to-fry survival estimate was calculated by dividing the estimated number of shoreline-spawned fry in a given year by the estimated number of eggs deposited on the shoreline in the previous year.…”

Section: Introductionmentioning

confidence: 99%

Incubation success and habitat selection of shore‐spawning kokanee Oncorhynchus nerka: effects of water‐level regulation and habitat characteristics

Whitlock

Quist

Dux

2014

Ecology of Freshwater Fish

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Changes to water-level regimes have been known to restructure fish assemblages and interfere with the population dynamics of both littoral and pelagic species. The effect of altered water-level regimes on shorespawning kokanee Oncorhynchus nerka incubation success was evaluated using a comprehensive in situ study in Lake Pend Oreille, ID, USA. Survival was not related to substrate size composition or depth, indicating that shorespawning kokanee do not currently receive a substrate-mediated survival benefit from higher winter water levels. Substrate composition also did not differ among isobaths in the nearshore area. On average, the odds of an egg surviving to the preemergent stage were more than three times greater for sites in downwelling areas than those lacking downwelling. This study revealed that shoreline spawning habitat is not as limited as previously thought. Downwelling areas appear to contribute substantially to shore-spawning kokanee recruitment. This research illustrates the value of rigorous in situ studies both for testing potential mechanisms underlying population trends and providing insight into spawning habitat selection.

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Drawdown, Habitat, and Kokanee Populations in a Western U.S. Reservoir

McLaren

Kirk²,

Mabaka

et al. 2023

N American J Fish Manag

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Greater drought frequency and severity due to climate change will result in greater drawdown of water storage reservoirs. However, changes to oxythermal regimes due to drawdown are reservoir specific and interface with fish species-specific habitat requirements, producing varying effects on coldwater fish populations. We examined the effect of drawdown on the oxythermal habitat and relative abundance of kokanee Oncorhynchus nerka, a coldwater salmonid, in Island Park Reservoir on the Henrys Fork of the Snake River, Idaho. A measure of relative kokanee abundance was negatively, exponentially related to drawdown. Oxythermal patterns measured in the reservoir during 2021, a severe drought year, revealed that drawdown reduced kokanee habitat by increasing water temperatures and decreasing dissolved oxygen concentrations. Oxythermal refugia for kokanee appeared to relate to inflow from the spring-fed Henrys Fork and other groundwater inflows. However, we did not quantify groundwater flow or connections, and we did not study kokanee population demographics or mortality. Reducing these sources of uncertainty is a priority for future study. Still, our study highlights a potential mechanism connecting reservoir drawdown to fish populations and the unique yet predictable mechanisms by which reservoir drawdown interacts with reservoir morphometry to affect fish habitat availability.

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Lake Pend Oreille Fishery Recovery Project, 2002 Annual Report.

Cited by 5 publications

References 0 publications

The life history characteristics, growth and density of Mysis diluviana in Lake Pend Oreille, Idaho, USA

The life history characteristics, growth and density of Mysis diluviana in Lake Pend Oreille, Idaho, USA

Incubation success and habitat selection of shore‐spawning kokanee Oncorhynchus nerka: effects of water‐level regulation and habitat characteristics

Drawdown, Habitat, and Kokanee Populations in a Western U.S. Reservoir

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