Download or read book Escapement and Harvest of Chilkoot River Sockeye Salmon 2004 2006 written by Randall L. Bachman and published by . This book was released on 2013 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 2004-2006.
Download or read book Escapement and Harvest of Chilkoot River Sockeye Salmon 2007 2012 written by Randall L. Bachman and published by . This book was released on 2014 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Chilkoot Lake Sockeye Salmon Stock Status and Escapement Goal Review written by Rich Brenner and published by . This book was released on 2018 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Situk River Chinook and Sockeye Salmon Sport Harvest Estimates 2004 2005 2006 and 2007 written by Robert E. Johnson and published by . This book was released on 2008 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of angler effort and harvests of chinook salmon, Oncorhynchus tshawytscha, and sockeye salmon, O. nerka, at the Situk River, near Yakutat, Alaska, from June through July in 2004-2007.
Download or read book Estimates of Escapement of Sockeye Salmon Into Speel Lake in 2004 written by Renate R. Riffe and published by . This book was released on 2005 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chilkat Lake Sockeye Salmon Escapement Goal Review written by Sara E. Miller and published by . This book was released on 2018 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: We reviewed the escapement goal for the Chilkat Lake sockeye salmon (Oncorhynchus nerka) run, which is intensely harvested in the District 15 commercial drift gillnet fishery in Lynn Canal, Southeast Alaska. The current biological escapement goal of 70,000 to 150,000 sockeye salmon was established in 2009, based on a spawner-recruit analysis with weir counts converted to mark-recapture units. We fit age-structured state-space spawner-recruit models to updated 1976-2016 data on abundance, harvest, age composition, and coefficients of variation to examine the effect of autocorrelation and fry plants on recruits and to recommend a new biological escapement goal in Dual-frequency Identification Sonar (DIDSON) units. Historical mark-recapture and weir counts were considered indices of escapement, while the DIDSON counts (2008-2016) were considered 'true' counts of escapement. Fishery management reference points as well as optimal yield, optimal recruitment, and overfishing profiles were estimated from the final state-space Ricker model. Estimates derived from the state-space Ricker model suggest that the probability of achieving yields greater than 90% of maximum sustained yield from escapements at the current upper and lower bounds is 62% and 34%, respectively, and an average 65% over the entire escapement goal range. Therefore, we recommend maintaining the current biological escapement goal of 70,000 to 150,000 sockeye salmon counted at the Chilkat Lake weir site with the DIDSON sonar.
Download or read book Bristol Bay Sockeye Salmon Inriver Test Fishing 2004 written by Frederick W. West and published by . This book was released on 2007 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports on the results of the mid-June to mid-July 2004 inriver test fisheries on the Kvichak, Egegik, and Ugashik Rivers, where preliminary test fish escapement estimates were used as an inseason management tool to regulate sockeye salmon commercial harvests and achieve escapement goals.
Download or read book Sport Effort Harvest and Escapement of Sockeye Salmon in the Buskin River Kodiak Alaska 1988 written by John B. Murray and published by . This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mark recapture Experiments to Estimate the Abundance of Sockeye Salmon in the Lost River in 2003 and 2004 written by David L. Waltemyer and published by . This book was released on 2005 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chinook Salmon Escapement in the Gulkana River 2005 2006 written by James William Savereide and published by . This book was released on 2010 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sockeye Salmon Stock Status and Escapement Goals in Southeast Alaska written by Steven C. Heinl and published by . This book was released on 2011 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes escapement and harvest information of sockeye salmon in the southeast Alaska and Yakutat areas.
Download or read book Anchor River 2003 and 2004 Chinook Salmon and 2004 Coho Salmon Escapement written by Carol M. Kerkvliet and published by . This book was released on 2008 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chinook Salmon Escapement in the Gulkana River 2003 2004 written by Linda J. Perry-Plake and published by . This book was released on 2007 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of Sockeye Salmon Escapement in Mortensens Creek Izembek National Wildlife Refuge 2006 and 2001 to 2006 Run Comparisons written by Jeffry L. Anderson and published by . This book was released on 2007 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Run Reconstruction and Escapement Goals for Alsek River Sockeye Salmon written by Douglas Murrell Eggers and published by . This book was released on 2011 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book A Mark recapture Experiment to Estimate the Escapement of Sockeye Salmon in the East Alsek River 2004 written by David L. Waltemyer and published by . This book was released on 2005 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Kodiak Management Area Salmon Escapement and Catch Sampling Results 2006 written by Matthew Birch Foster and published by . This book was released on 2007 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Roughly 1.0 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 2006. Adult sockeye salmon were sampled for age, sex, and length determination on river systems in the KMA and approximately 10 thousand escapement scale samples were used to represent escapement age compositions.
