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Author: Randall L. Bachman Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 84
Book Description
Results of a stock assessment program conducted by the Alaska Department of Fish and Game, Division of Commercial Fisheries to estimate escapements and harvest of adult Chilkoot Lake sockeye salmon (Oncorhynchus nerka) in 2007-2012.
Author: Randall L. Bachman Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 84
Book Description
Results of a stock assessment program conducted by the Alaska Department of Fish and Game, Division of Commercial Fisheries to estimate escapements and harvest of adult Chilkoot Lake sockeye salmon (Oncorhynchus nerka) in 2007-2012.
Author: Rich Brenner Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 34
Book Description
Chilkoot Lake, located in upper Lynn Canal near the city of Haines, supports one of the largest runs of sockeye salmon (Oncorhynchus nerka) in southeast Alaska. This stock is currently managed as a sustainable escapement goal range with a lower bound of 38,000 and an upper bound of 86,000 spawners. Escapement is monitored by the Alaska Department of Fish and Game with a weir on the Chilkoot River, and stock of origin from the District 15 commercial drift gillnet fishery harvest is determined using scale pattern analysis. We used Ricker spawner-recuit models in a Bayesian framework to fit data from brood years 1976-2010. Given significant autocorrelation at lag-1, we chose an autoregressive Ricker model for this assessment. Based on model results, maximum sustainable yield would be achieved with an escapement of approximately 52,900 sockeye salmon (median of spawning abundance at maximum sustained yield), and a range of 45,000-60,000 spawners would result in a greater than 80% probability of achieving at least 90% of maximum sustainable yield. This range of escapements fits within the current escapement goal range and, given considerable uncertainty in parameter estimates, we do not recommend changes to the goal at this time. However, some large escapements since 2012 will provide contrast to the existing data once the resulting recruits can be enumerated; thus, we recommend reassessing this escapement goal prior to the Alaska Board of Fisheries meeting in 2021.
Author: Brian W. Elliott Publisher: ISBN: Category : Coho salmon Languages : en Pages : 60
Book Description
The purpose of this study was to conduct a full stock assessment of Chilkat River coho salmon Oncorhynchus kisutch. Coho salmon smolt were captured in the Chilkat River during spring 2009, marked with an adipose fin clip and a coded wire tag (CWT), and sampled for age, weight, and length. In 2010, adult coho salmon were sampled for CWTs in sport and commercial fishery harvests throughout Southeast Alaska and in the Chilkat River to estimate the marked fraction. In addition, the 2010 escapement to the Chilkat River was estimated by expanding peak survey counts.
Author: Jeffrey L. Estensen Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 74
Book Description
This report provides a description of the chinook salmon, Oncorhynchus tshawytscha, fisheries in the Unalakleet Area; summarizes available harvest, escapement, age and sex information for returns to the Unalakleet River; and provides recommendations for improved data collection and escapement goals.
Author: John H. Clark Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 112
Book Description
"Age compositions, escapements, and harvests of sockeye salmon Oncorhynchus nerka returning to the Alsek, Akwe, East Alsek, Italio, and Lost rivers ... was used to develop brood tables and to estimate spawner-recruit relationships"--Abstract.
Author: Matthew Birch Foster Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 104
Book Description
Roughly 1.2 million sockeye salmon Oncorhynchus nerka were estimated to escape through Alaska Department of Fish and Game salmon counting weirs in the Kodiak Management Area (KMA) during 2007. Adult sockeye salmon were sampled for age, sex, and length determination on river systems in the KMA and approximately 14,000 escapement scale samples were used to represent escapement age compositions.
Author: Douglas Murrell Eggers Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 69
Book Description
Report discusses escapement goal analyses for stocks of sockeye salmon in the transboundary Alsek River and in one of its tributaries, the Klukshu River. Data and estimates for harvest, in-river run size, harvest rates, relative age composition, and escapements for calendar years 1976 through 2008 are provided.
Author: Randall L. Bachman
Author: Randall L. Bachman
Author: Rich Brenner
Author: Brian W. Elliott
Author: International Pacific Salmon Fisheries Commission
Author: Michael L. Dahlberg
Author: Jeffrey L. Estensen
Author: John H. Clark
Author: Matthew Birch Foster
Author: Carol M. Kerkvliet
Author: Douglas Murrell Eggers