A Comparison of Estimates from 2 Hydroacoustic Systems Used to Assess Sockeye Salmon Passage in 5 Alaska Rivers PDF Download
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Author: Suzanne L. Maxwell Publisher: ISBN: Category : Copper River (Alaska) Languages : en Pages : 155
Book Description
Report discusses the relationship between salmon escapement estimates obtained from the 2 sonar systems used--Bendix echo-counting sonar and a dual-frequency identification sonar (DIDSON).
Author: Suzanne L. Maxwell Publisher: ISBN: Category : Copper River (Alaska) Languages : en Pages : 155
Book Description
Report discusses the relationship between salmon escapement estimates obtained from the 2 sonar systems used--Bendix echo-counting sonar and a dual-frequency identification sonar (DIDSON).
Author: William J. Glick Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 0
Book Description
Dual-frequency Identification Sonar (DIDSON; Belcher et al. 2002) is used annually to estimate sockeye salmon Oncorhynchus nerka passage into the Kenai River of Upper Cook Inlet (UCI), Alaska (Figure 1). Adaptive Resolution Imaging Sonar (ARIS) is used to estimate sockeye salmon passage into the Kasilof River. Both multi-beam sonar systems are manufactured by Sound Metrics Corporation with ARIS being an upgraded replacement of the DIDSON. Sonar passage estimates of sockeye salmon are used for inseason management of UCI commercial fisheries, as well as personal use fisheries in the Kenai and Kasilof rivers, to achieve established escapement goals and inriver run goals. The current sustainable escapement goal (SEG) for sockeye salmon in the Kenai River is 750,000–1,300,000 fish. The inriver goal for sockeye salmon in the Kenai River is 1,000,000–1,200,000 fish if the forecasted return estimate is 2,300,000; 1,100,000–1,400,000 fish for a forecasted return of 2,300,000–4,600,000; and 1,200,000–1,600,000 fish for a forecasted return of 4,600,000 (Marston and Frothingham In prep). The Kasilof River optimal escapement goal (OEG) is 140,000–370,000 sockeye salmon, with a biological escapement goal (BEG) of 140,000–320,000. (McKinley et al. 2020). Fish wheels are used to capture migrating salmon for 1) species apportionment; 2) to estimate age, length, and sex composition of the sockeye salmon escapement; and, 3) to collect genetic samples as needed. Historical sonar passage and escapement data for the Kenai and Kasilof rivers (Table 1) is provided in yearly Regional Information and Fishery Data Series reports as exhibited by Glick and Marston (In prep). This plan outlines how sonar sampling and logistical operations will be conducted for each of these sonar enumeration sites.
Author: April V. Faulkner Publisher: ISBN: Category : Fish populations Languages : en Pages : 118
Book Description
The feasibility of using sonar in the lower Kvichak River to assess adult sockeye salmon Oncorhynchus nerka passage was evaluated as a possible replacement for the existing inriver gillnet test fishery.
Author: Carl Thomas Pfisterer Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 57
Book Description
Daily passage estimates for chinook salmon (Oncorhynchus tshawytscha) and summer and fall chum salmon (Oncorhynchus keta) are provided for the corresponding 2001 Yukon River escapement. A two component process was utilized: estimation of total fish passage via a single-beam sonar at the confluence of the Yukon and Atchuelinguk rivers, and estimation of species proportions by sampling with a series of gillnets near the same (Pilot Station) site.
Author: Elizabeth A. Smith Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 42
Book Description
This reports on the results of using the Dual-Frequency Identification Sonar (DIDSON) and split-beam sonar equipment, which were used to estimate Chinook salmon, Oncorhynchus tshawytscha, and fall chum salmon, Oncorhynchus keta, passage in the Yukon River near Eagle, Alaska from July 5 to October 6, 2011. This continued long-term hydroacoustic enumeration project for Chinook and chum salmon near the United States/Canada border will help fishery managers meet conservation and management commitments made by both countries under the Yukon River Salmon Agreement.
Author: Kyle D. Vaught Publisher: ISBN: Category : Coho salmon Languages : en Pages : 54
Book Description
Reports on the feasibility of using dual beam sonar to facilitate data collection for estimating riverine abundance estimates of coho salmon (Oncorhynchus kisutch) in the Kenai River. Drift gill nets and fish wheels were also used to collect length frequency data; diurnal patterns in fish passage were also documented.
Author: Suzanne L. Maxwell
Author: Suzanne L. Maxwell
Author: 
Author: William J. Glick
Author: April V. Faulkner
Author: David Alan Levy
Author: Carl Thomas Pfisterer
Author: Douglas W. Lieb
Author: Elizabeth A. Smith
Author: Kyle D. Vaught
Author: David Alan Levy