Effectiveness of lake trout (Salvelinus namaycush) suppression in Lake Pend Oreille, Idaho: 2006–2016

Dux, Andrew M.; Hansen, Michael J.; Corsi, Matthew P.; Wahl, Nicholas C.; Fredericks, James P.; Corsi, Charles E.; Schill, Daniel J.; Horner, Ned J.

doi:10.1007/s10750-019-3913-z

Cited by 27 publications

(43 citation statements)

References 49 publications

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“…Dux et al. (2019) described the suppression of Lake Trout in Lake Pend Oreille, the focal area of this study. They emphasized the importance of understanding Lake Trout distribution patterns, spawning areas, and population characteristics prior to and during their suppression efforts to increase their efficiency and success.…”

Section: Discussionmentioning

confidence: 90%

“…Although successful suppression netting programs for Lake Trout in the northwest (e.g., Dux et al. 2019; Koel et al. 2020) and others provide many lessons and a template for future Walleye suppression efforts on Lake Pend Oreille and elsewhere, the life history characteristics of Lake Trout are fundamentally different from those of Walleye.…”

Section: Discussionmentioning

confidence: 99%

“…Collapse was avoided in large part due to an aggressive and successful predator removal program that was directed at suppressing the growing Lake Trout population (Dux et al. 2019). Walleye prefer to consume soft‐rayed prey fishes, such as salmonids (Knight et al.…”

Section: Figurementioning

confidence: 99%

“…Indeed, intensive population dynamics research improved the management of invasive Lake Trout in Lake Pend Oreille (Dux et al. 2019) and in Yellowstone Lake, Wyoming (Koel et al. 2020).…”

Section: Figurementioning

confidence: 99%

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Characteristics of an Introduced Walleye Population with Implications for Suppression

Ryan

Corsi

Rust

2021

N American J Fish Manag

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The management of introduced fishes, including Walleye Sander vitreus, whether for control or enhancement, requires understanding of population dynamics at the invasion front. Walleye recently established in the Pend Oreille basin, Idaho, threaten the existing salmonid‐based fish community and associated recreational fishery. Therefore, the objectives of this study were to describe population growth and associated life history characteristics. Walleye were sampled in October of 2011, 2014, and 2017 using a standardized gill netting survey protocol to describe trends in relative abundance and evaluate population dynamics. Relative abundance increased exponentially from 1.4 to 4.3 fish/net over the 6‐year monitoring period. This population was characterized by fast somatic growth, robust body condition, and early age at maturity at or near the biological maxima for Walleye. Among the survey years, mean length at age 2 varied for female (359–441 mm) and male (358–426 mm) Walleye and relative weight varied from 91 to 98. The sampled Walleye matured at 1 to 4 years of age, and recruitment became more consistent as abundance increased. These density‐dependent metrics suggest that the Walleye population is still at low density relative to carrying capacity. The information that was gained from this study was used to better understand potential risks and guide management decisions related to experimental population suppression that is now underway. Suppression under these conditions must overcome the recruitment capabilities of the population. We conclude that natural mortality is likely regulated by density‐dependent processes. Therefore, at current (low) density, fishing mortality may be entirely additive and compensation is unlikely to further complicate management.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

“…Indeed, intensive population dynamics research improved the management of invasive Lake Trout in Lake Pend Oreille (Dux et al. 2019) and in Yellowstone Lake, Wyoming (Koel et al. 2020).…”

Section: Figurementioning

confidence: 99%

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Characteristics of an Introduced Walleye Population with Implications for Suppression

Ryan

Corsi

Rust

2021

N American J Fish Manag

Self Cite

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“…Five articles were included here in the proceedings. First, Dux et al (2019) Rogers et al (2019) found that the Klondike strain lake charr had lower survival, were heavier at length, grew to shorter length at maturity and asymptotic length, and had higher frequencies of fresh sea lamprey wounds at larger sizes than the Seneca strain of lean lake charr in Lake Erie. Fifth, Carlson et al (2019) used precipitation-and groundwater-corrected stream temperature models to predict effects of climate change on brook charr populations in Michigan.…”

Section: Managementmentioning

confidence: 99%

Assessing the impact of charr research past, present, and future

et al. 2019

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The 9th International Charr Symposium convened on 18-21 June 2018, in Duluth, Minnesota, USA, to gather scientists with an interest in charr biology and management from the entire geographical range of the genus Salvelinus. The symposium was attended by 169 individuals from six countries, and included 99 oral and 32 poster presentations, 28 of which were published in the ensuing proceedings. Topic areas of presentations and publications included (1) cultural anthropology; (2) genetics, evolution, taxonomy, and systematics; (3) behavior, movement, and habitat; (4) reproductive ecology, developmental ontogeny, and physiology; (5) population ecology, dynamics, and life history; (6) trophic ecology, parasites, predators, toxicology, and pollution; and (7) management. Research reported in these proceedings has built upon the history of earlier symposiums and will be continued with the 10th symposium scheduled to convene in Nikko City, Tochigi Prefecture, Japan, in 2021.

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Yellowstone Cutthroat Trout Recovery in Yellowstone Lake: Complex Interactions Among Invasive Species Suppression, Disease, and Climate Change

Glassic,

Chagaris,

Guy

et al. 2023

Fisheries

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In Yellowstone Lake, Wyoming, the largest inland population of nonhybridized Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri, hereafter Cutthroat Trout, declined throughout the 2000s because of predation from invasive Lake Trout Salvelinus namaycush, drought, and whirling disease Myxobolus cerebralis. To maintain ecosystem function and conserve Cutthroat Trout, a Lake Trout gill netting suppression program was established in 1995, decreasing Lake Trout abundance and biomass. Yet, the response of Cutthroat Trout to varying Lake Trout suppression levels, collectively with the influence of disease and climate, is unknown. We developed an ecosystem model (calibrated to historical data) to forecast (2020–2050) whether Cutthroat Trout would achieve recovery benchmarks given disease, varying suppression effort, and climate change. Lake Trout suppression influenced Cutthroat Trout recovery; current suppression effort levels resulted in Cutthroat Trout recovering from historical lows in the early 2000s. However, Cutthroat Trout did not achieve conservation benchmarks when incorporating the influence of disease and climate. Therefore, the National Park Service intends to incorporate age‐specific abundance, spawner biomass, or both in conservation benchmarks to provide better indication of how management actions and environmental conditions influence Cutthroat Trout. Our results illustrate how complex interactions within an ecosystem must be simultaneously considered to establish and achieve realistic benchmarks for species of conservation concern.

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Effectiveness of lake trout (Salvelinus namaycush) suppression in Lake Pend Oreille, Idaho: 2006–2016

Cited by 27 publications

References 49 publications

Characteristics of an Introduced Walleye Population with Implications for Suppression

Characteristics of an Introduced Walleye Population with Implications for Suppression

Assessing the impact of charr research past, present, and future

Yellowstone Cutthroat Trout Recovery in Yellowstone Lake: Complex Interactions Among Invasive Species Suppression, Disease, and Climate Change

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