Diel and Seasonal Movement of Lake Trout, Cutthroat Trout, and Bull Trout Between Upper Priest Lake and Priest Lake, Idaho PDF Download

Author: Jacob A. Venard
Publisher:
ISBN:
Category : Bull trout
Languages : en
Pages : 204

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Author: Derek C. Entz
Publisher:
ISBN:
Category : Bull trout
Languages : en
Pages : 92

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Book Description
Chapter 2. "The effects and impacts introduced species have on native species is well known in some cases and less well for others. The introduction and success of Lake Trout in the Priest Lake system, in Idaho, poses a threat to native fish populations. In an effort to further understand the potential competition and predation on native species in Upper Priest Lake, 283 stomachs were collected from Lake Trout in 2015 and 2016. Small Lake Trout (500 mm total length (TL)) fed at a significantly higher rate on Mysis shrimp (Mysis diluviana) than larger Lake Trout (500 mm TL; P0.001). Larger Lake Trout (500 mm TL) fed at a significantly higher rate on fish than small Lake Trout (P

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 412

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"Education, arts and social sciences, natural and technical sciences in the United States and Canada".

Author: John T. Heimer
Publisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 58

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Book Description

Author: Donald R. Beach
Publisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 28

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Book Description

Author: John T. Heimer
Publisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 58

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Book Description

Author: Richard Anthony Irizarry
Publisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 27

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Book Description

Author: John T. Heimer
Publisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 56

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Book Description

Author: Bruce E. Rieman
Publisher:
ISBN:
Category : Bull trout
Languages : en
Pages : 44

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Book Description

Author: Mark Paluch
Publisher:
ISBN:
Category : Bull trout
Languages : en
Pages : 300

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Book Description
"Dams built without a means of fish passage such as Albeni Falls Dam, constructed on the Pend Oreille River, ID in 1955, block fish migration to their natal tributary. The first set of objectives for this study were: to provide bull trout (Salvelinus conjluentus) passage around Albeni Falls Dam, predict natal tributary from genetic samples, and track the movements of the tagged fish to determine if the tributary entered during for spawning period matched the genetically predicted natal tributary for each fish. Eight bull trout were captured below Albeni Falls Dam. Each fish was surgically implanted with a transmitter and released above the dam. Genetic samples from each fish were compared with databases of known bull trout populations located between Albeni Falls Dam and Thompson Falls Dam, MT to determine the most probable natal tributary of each fish. Movements were monitored using radio and acoustic telemetry via twelve fixed receiver stations (four at Albeni Falls Dam, one on the Priest River, two near the Dover railroad tracks leading into Lake Pend Oreille, one on the Pack River, and one on each of the major bull trout producing tributaries of Lake Pend Oreille: Lightning, Trestle, Gold, and Granite creeks) and mobile tracking via vehicle, boat and aircraft. Seven of the eight tagged bull trout migrated past the receiver stations leading into Lake Pend Oreille and one fish traveled up the Priest River. Five of the fish transmitters were detected in the predicted natal tributary. Of the three tags not detected in the predicted natal tributaries; one fish was located in Lake Pend Oreille, one fish has not been located since entering the lake, and one fish was last detected in the Priest River. Preliminary results indicate most bull trout that are provided passage upstream of Albeni Falls Dam attempt to return to upstream tributaries to spawn. These tributaries are most likely their natal tributaries. Providing passage upstream of Albeni Falls Dam reduces losses to populations and protects genetic integrity of native bull trout in the Pend Oreille Basin. The second set of objectives for this study were to: analyze spatial and temporal distributions along the downstream face of Albeni Falls Dam, analyze the relationship between fish behavior and operating conditions of dam, and track movements downstream from the dam. Twelve bull trout and seventeen westslope cutthroat trout (Oncorhynchus clarki) were tagged and released below Albeni Falls Dam. When released below Albeni Falls Dam, bull trout tended to approach the dam before exploring downstream. They generally stayed within a short distance of the dam until water temperature began to rise. Distances of downstream travel increased as temperatures increased. These increased distances traveled downstream were probably made in search of cold. Six bull trout were found downstream of Albeni Falls Dam in areas where cooler water enters the Pend Oreille River. These provided cold water refuge for bull trout when the Pend Oreille River water temperature rose above the bull trout's thermal zone of tolerance (16°C). The existence of cold water refuge downstream from Albeni Falls Dam allows for the potential re-establishing bull trout populations in the Pend Oreille River. Data was collected in two macro and four micro zones on seven of the bull trout and fifteen of the westslope cutthroat trout. Movements were detected on both sides of the powerhouse and tailrace spillways, where potential sites for establishing permanent fish passage have been identified. Albeni Falls Dam has three turbines. No combination of flow through these turbines was found that excluded bull trout or westslope cutthroat trout from moving throughout the entire powerhouse tailrace. Data collected below Albeni Falls Dam indicates a preference for the powerhouse tailrace by bull trout"--Document.