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Author: Holly I. Dickson Publisher: ISBN: Category : Coho salmon Languages : en Pages : 38
Book Description
In 2021, the Alaska Department of Fish and Game, Division of Sport Fish will operate a sonar project to estimate coho salmon (Oncorhynchus kisutch) escapement in Battle Creek, located approximately 2 miles southwest of the Bradley Lake Hydroelectric Project, which partially diverted Battle Creek into Bradley Lake at river kilometer 10.9 starting in 2020. The sonar will be operated at river kilometer 1.7 from early September until mid-November or the stream ices over, whichever is earlier. A fixed-picket weir will be installed to constrict fish passage in front of the sonar. Beach seine sampling will be conducted when the sonar is installed to determine if any adult coho salmon migrated past the sonar site prior to installation. Additional seine sampling will be conducted to determine if species apportionment is needed for the sonar counts. Foot surveys to visually count adult coho salmon will also be conducted such that data are comparable to previous years’ surveys conducted by the Alaska Energy Authority. Juvenile coho salmon sampling will occur in mid-October or when the stream flow reaches 75 cfs or less. Baited minnow traps will be used, and an analysis of catch-per-unit-effort will be used as an index of abundance of juvenile coho salmon between years.
Author: Holly I. Dickson Publisher: ISBN: Category : Coho salmon Languages : en Pages : 38
Book Description
In 2021, the Alaska Department of Fish and Game, Division of Sport Fish will operate a sonar project to estimate coho salmon (Oncorhynchus kisutch) escapement in Battle Creek, located approximately 2 miles southwest of the Bradley Lake Hydroelectric Project, which partially diverted Battle Creek into Bradley Lake at river kilometer 10.9 starting in 2020. The sonar will be operated at river kilometer 1.7 from early September until mid-November or the stream ices over, whichever is earlier. A fixed-picket weir will be installed to constrict fish passage in front of the sonar. Beach seine sampling will be conducted when the sonar is installed to determine if any adult coho salmon migrated past the sonar site prior to installation. Additional seine sampling will be conducted to determine if species apportionment is needed for the sonar counts. Foot surveys to visually count adult coho salmon will also be conducted such that data are comparable to previous years’ surveys conducted by the Alaska Energy Authority. Juvenile coho salmon sampling will occur in mid-October or when the stream flow reaches 75 cfs or less. Baited minnow traps will be used, and an analysis of catch-per-unit-effort will be used as an index of abundance of juvenile coho salmon between years.
Author: Brandon H. Key Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 130
Book Description
Alaska Department of Fish and Game (ADF&G) has monitored Chinook salmon (Oncorhynchus tshawytscha) passage in the Kenai River using side-looking sonar technology from 1987 to present. The historical site at RM 8.6 used dual-beam (1987–1994), split-beam (1995–2011), and dual-frequency identification sonar or “DIDSON” (2012–2014) technology. Starting in 2013, ADF&G began operating adaptive resolution imaging sonar or “ARIS” at a new site located at RM 13.7. The RM 8.6 site was discontinued following the 2014 season in favor of data collection at the RM 13.7 site. This plan covers RM 13.7 project operations for the 2020–2022 seasons.
Author: Mark J. Witteveen Publisher: ISBN: Category : Coho salmon Languages : en Pages : 62
Book Description
A weir will be used on the Buskin River to count the inriver coho salmon run, with harvest estimated by the Alaska Department of Fish and Game statewide harvest survey, returned subsistence permits, and commercial fish tickets. Age and sex information will be collected from the Buskin River coho salmon run and the composition of the run by age and sex will be estimated. In addition, coho salmon escapements to 10 other drainages on the Kodiak road system (KRS) will also be indexed. SEGs associated with the American, Olds and Pasagshak Rivers will be monitored via postseason escapement foot surveys. A simultaneous postseason drone survey will also be conducted on the American and Olds rivers to explore establishment of drone-based SEGs. Multiple inseason surveys will be conducted by drone at each of the Olds, American, and Pasagshak river drainages to provide inseason run information to fishery managers; the inseason data will also be used to explore new ways of establishing SEGs for the Pasagshak river. Postseason escapement foot surveys will be conducted for the remaining 7 KRS rivers without SEGs (Monashka, Pillar, Salonie, Felton, Roslyn, Sargent, and Russian). The Pasagshak River coho salmon escapement will also be estimated with a temporally stratified mark-recapture study.
Author: Greg Buck Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 41
Book Description
The Alaska Department of Fish and Game, Division of Commercial Fisheries, monitors annual escapements of salmon returning to the Nushagak River system near Dillingham, Alaska. Hydroacoustic techniques, dual frequency identification sonar (DIDSON), are used to develop escapement estimates of sockeye Oncorhynchus nerka, Chinook O. Tshawytscha, chum O. keta, coho O. kisutch, and pink O. gorbuscha salmon into the Nushagak River. Sonar passage estimates are used for inseason management of commercial fisheries in the Nushagak District. Estimates of species composition, age, sex, and length, are derived from samples obtained with drift gillnets. This report provides operational guidelines for the Nushagak River sonar project, estimation of salmon escapement, and sampling procedures, as well as general camp policies.
Author: Lee K. Borden Publisher: ISBN: Category : Coho salmon Languages : en Pages : 0
Book Description
This project surveys the sport fishery on the Nushagak River. Information will be collected on angler-days of effort by type of angler (guided vs. unguided) and gear (bait vs. no bait); catch and harvest rates of coho salmon; as well as sex, length, and weight of coho salmon in the sport harvest. Data collected from onsite surveys will be used to document use patterns and design regulations that accommodate growth of the sport fishery while maintaining angling opportunity. Results will also guide review of current regulations and will be used to assess the effectiveness of current regulations in maintaining compliance with the management plan.
Author: Jeffrey T. Williams Publisher: ISBN: Category : Coho salmon Languages : en Pages : 0
Book Description
Coho salmon Oncorhynchus kisutch smolt abundance and adult escapement will be estimated for the Taku stock of coho salmon originating from the Canadians portion of the Taku River, above the U.S./Canada border. This large glacial river flows into Taku Inlet about 30 km northeast of Juneau, Alaska. Multiple, independent sampling approaches will be used including coded wire tagging of smolt, adult harvest sampling, and an inriver adult mark-recapture experiment. A modified Petersen estimator will be used to estimate the smolt emigration during 2019 to 2021. A mark-recapture experiment will be used to estimate inriver runs of adult coho salmon in 2019 to 2021. Radio tags will be used to estimate the number of fish tagged during event 1 of the adult mark-recapture experiment that did not pass the U.S./Canada Border. Inriver harvest will be accounted for in determining escapement estimates for coho salmon annually. Scale samples of coho salmon will be used for age analysis to estimate annual age compositions. Coho salmon smolt will be systematically sampled to estimate the mean length for each species.
Author: Jeffrey J. Opperman Publisher: Univ of California Press ISBN: 0520294106 Category : Business & Economics Languages : en Pages : 268
Book Description
Introduction to temperate floodplains -- Hydrology -- Floodplain and geomorphology -- Biogeochemistry -- Ecology: introduction -- Floodplain forests -- Primary and secondary production -- Fish and other vertebrates -- Ecosystem services and floodplain reconciliation -- Floodplains as green infrastructure -- Case studies of floodplain management and reconciliation -- Central Valley floodplains: introduction and history -- Central Valley floodplains today -- Reconciling Central Valley floodplains -- Conclusions: managing temperate floodplains for multiple benefits
Author: OECD Publisher: OECD Publishing ISBN: 9264251723 Category : Languages : en Pages : 256
Book Description
This report explores the growth prospects for the ocean economy, its capacity for future employment creation and innovation, and its role in addressing global challenges. Special attention is devoted to the emerging ocean-based industries.
Author: Holly I. Dickson
Author: Holly I. Dickson
Author: Brandon H. Key
Author: Mark J. Witteveen
Author: Greg Buck
Author: Lee K. Borden
Author: Jeffrey T. Williams
Author: Jeffrey J. Opperman
Author: Peter B. Moyle
Author: Worrall Reed Carter
Author: OECD