Download or read book Abundance and Spawning Distribution of Susitna River Chum Onchorhynchus Keta and Coho O Kisutch Salmon 2012 written by Peter Mallon Cleary and published by . This book was released on 2016 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2009, the Alaska Department of Fish and Game began a 4-year spawning distribution and abundance estimation study in response to concerns over the status of the Susitna River chum (Oncorhynchus keta) and coho (O. kisutch) salmon stocks. This report summarizes results of mark-recapture abundance and distribution assessments completed during 2012. Four fish wheels were used at river mile (RM) 22 in the Susitna River to capture and tag chum and coho salmon with dart tags in July and August 2012. Two fish wheels were used at RM 6 in the Yentna River and 2 fish wheels were used at RM 34 in the mainstem Susitna River to sample salmon for tags. Estimated spawning abundance of chum salmon was 229,903 (SE 155,193) fish for the mainstem Susitna River and 99,442 (SE 84,876) fish for the Yentna River. Estimated spawning abundance of coho salmon was 90,397 (SE 36,701) fish for the mainstem Susitna River and 93,919 (SE 10,688) fish for the Yentna River. A total of 799 radio tags were placed in chum and coho salmon. Their movements were tracked using 10 ground tracking stations, 15 aerial surveys of the mainstem Susitna River, 6 aerial surveys of the Yentna River, and 2 drainagewide aerial surveys. All but 50 of the radio tags were relocated, and 716 (89.6%) were assigned a putative spawning location. Both chum and coho salmon exhibited bank orientation at the tagging site.
Download or read book Abundance and Spawning Distribution of Susitna River Chum Oncorhynchus Keta and Coho O Kisutch Salmon 2011 written by Peter Mallon Cleary and published by . This book was released on 2016 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2009, the Alaska Department of Fish and Game began a 4-year spawning distribution and abundance estimation study in response to concerns over the status of the Susitna River chum (Oncorhynchus keta) and coho (O. kisutch) salmon stocks. This report summarizes results of mark-recapture abundance and distribution assessments completed during 2011. Four fish wheels were used to capture and tag chum and coho salmon with dart tags at river mile (RM) 22 in the Susitna River in July and August 2011. Two fish wheels were used at RM 7 in the Yentna River and 2 fish wheels were used at RM 34 in the mainstem Susitna River to sample salmon for tags. Estimated abundance of chum salmon was 1,473,969 (SE 123,933) fish for the mainstem Susitna River and 278,063 (SE 42,780) fish for the Yentna River. Estimated abundance of coho salmon was 131,878 (SE 24,146) fish for the mainstem Susitna River and 84,677 (SE 9,981) fish for the Yentna River. A total of 734 radio tags were placed in chum and coho salmon. Their movements were tracked using 6 ground tracking stations, 7 aerial surveys of the mainstem Susitna River, 6 aerial surveys of the Yentna River, and 3 drainagewide aerial surveys. All but 31 of the radio tags were relocated and 635 (86.5%) were assigned a putative spawning location. Both chum and coho salmon exhibited bank orientation at the tagging site.
Download or read book Abundance and Spawning Distribution of Susitna River Chum Oncorhynchus Keta and Coho O Kisutch Salmon 2010 written by Peter Mallon Cleary and published by . This book was released on 2013 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution of Spawning Susitna River Chum Oncorhynchus Keta and Coho O Kisutch Salmon 2009 written by Richard A. J. Merizon and published by . This book was released on 2010 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of the first year of a 4-year spawning distribution study of the lower Susitna River chum Oncorhynchus keta and coho O. kisutch salmon stocks, in which four fish wheels were used to capture and radio-tag chum and coho salmon from July through August 2009.
Download or read book Abundance Distribution and Surveys of Spawning Chinook Salmon 2012 2014 and Spawning Coho Salmon 2013 2014 in the Susitna River written by Richard J. Yanusz and published by . This book was released on 2018 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Between 2012 and 2014, information was collected on the distributions and abundances of adult Chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon as part of the Susitna-Watana Hydro studies conducted by the Alaska Department of Fish and Game in partnership with LGL Alaska Research Associates Inc. and the Alaska Energy Authority. Spawning distributions were assessed using radiotelemetry for Chinook salmon in the mainstem Susitna River in 2012-2014 and in the Yentna River in 2013 and 2014, and for coho salmon in the mainstem Susitna River in 2013 and 2014 only. Inriver abundances for both species were estimated using mark-recapture techniques in 2013 and 2014 for the mainstem Susitna River and for Chinook salmon in the Yentna River in 2014. For Chinook salmon, these abundance estimates were combined with telemetry data to estimate individual management unit-specific abundances which were then used to calculate the percent contribution of each to total abundance. In both 2013 and 2014, all units but unit 3 (upper Susitna River) contributed nearly equally (21-27%) to the total mainstem Susitna River Chinook salmon inriver run. When the Yentna River estimate was included with estimates for the other management units in 2014, the Yentna River contributed 25% to the drainagewide inriver run; units 1, 2, 5, and 6 contributed 15-19% each; and unit 3 contributed 7%. Sport harvest was subtracted from the mark-recapture inriver abundance to estimate escapement which was then compared to aerial indexes and weir counts. For Chinook salmon, index and weir counts counted 34-39% of the escapement on the mainstem Susitna River and 36% on the Yentna River. For coho salmon, the Deshka River weir counted 19% and 16% of the Sustina River escapements in 2013 and 2014, respectively. Foot counts of coho salmon escapement for 4 streams on the mainstem Susitna River accounted for an average of 0.9% of the escapement over 2013-2014.
Download or read book Distribution of Spawning Susitna River Chinook Oncorhynchus Tshawytscha and Pink Salmon O Gorbuscha 2012 written by Richard Yanusz and published by . This book was released on 2013 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study is to determine the spawning distribution of chinook salmon in the Susitna drainage upstream of the confluence with the Yentna River as well as the spawning distribution of pink salmon in the entire Susitna drainage. The information collected during the 2012 field season will be used to address the feasibility of conducting a basin-wide capture-recapture study of chinook salmon in 2013 and 2014.
Download or read book Synopsis of Biological Data on the Chum Salmon Oncorhynchus Keta Walbaum 1792 written by Richard G. Bakkala and published by . This book was released on 1970 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Documentation of Chinook Chum and Coho Salmon Presence in the Upper Tanana River Drainage written by Brandy Baker and published by . This book was released on 2022 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Documentation and inventory of anadromous fish species has been limited in the Upper Tanana River drainage due to its remoteness, perceived low salmon abundance, and the greater importance of nonsalmon species to local users. The mainstem Tanana River is known to have spawning populations of chum (Oncorhynchus keta) salmon, and limited documentation of Chinook (O. tshawytscha) and coho (O. kisutch) salmon in the upper reaches of the Tanana River. This study proposed to document Pacific salmon Oncorhynchus spp. spawning and rearing habitat in the Upper Tanana River drainage (the largest tributary of the Yukon River) using a combination of biological and social science methods. Ethnographic methods, such as in-depth interviews with key community fishers, were used to identify potential areas for biological sampling based on traditional ecological knowledge (TEK). Over 2 field seasons, researchers collected environmental DNA (eDNA) and attempted to capture both adult and juvenile salmon as evidence of salmon spawning or rearing. The eDNA lab results reported 6 out of 33 samples positive for chum salmon and all 33 samples were negative for Chinook or coho salmon. No physical evidence of salmon was found including the 6 sites that returned positive eDNA results for chum salmon; therefore, no additional findings were submitted to the Anadromous Water Catalog (AWC) to be listed as important for spawning, rearing, or migration of anadromous fish. Ethnographic evidence suggests that Chinook salmon do occasionally travel to the area, but no physical evidence of their presence was discovered through biological sampling. Salmon presence within the study area is likely sporadic and may fluctuate based on annual changes in environmental conditions, variability in salmon escapement abundance, run timing, and harvest levels in the lower reaches of the Yukon and Tanana Rivers.
Download or read book Inriver Abundance and Distribution of Spawning Susitna River Sockeye Salmon Oncorhynchus Nerka 2008 written by Richard Yanusz and published by . This book was released on 2011 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of sockeye salmon Oncorhynchus nerka escapement to the Susitna River drainage were determined via a capture-recapture experiment, which was conducted using radio tags, fish wheels, and weirs in 2008.
Download or read book Spawning Site Selection of Coho Salmon Oncorhynchus Kisutch in Susitna River Tributaries Alaska written by Betsy W. McCracken and published by . This book was released on 2021 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coho Salmon Oncorhynchus kisutch are the most widely distributed Pacific salmon species across Alaska. The lack of knowledge surrounding the habitat requirements of this species results in challenges for conservation and management due to natural and anthropogenic pressures. Tributaries of the Susitna River drainage in Alaska support many small and distinct Coho Salmon populations. Heterogeneity of in-stream spawning habitat is an ecological concept known to promote resiliency of salmonid populations. The goal of this study was to investigate the best habitat predictors of spawning site selection and the scale by which spawning habitat should be evaluated for management insights. Scale is particularly important when measuring, assessing, and predicting potential impacts to species from development activities because habitat research at the stream rather than the reach scale can overestimate the amount of available spawning habitat. I investigated a suite of field-measured stream habitat variables paired with empirical Coho Salmon spawning survey data in five tributaries during 2013 and 2014. Physical data was defined as biotic and abiotic surroundings of an organism or population that have an influence on survival, development, and evolution. Mixed-effects modeling results indicated that Coho Salmon spawning-site selection was positively related to gravel substrate and the presence of groundwater flux, and that spawning Coho Salmon avoided cobble substrate. Physical data were analyzed at both the stream and reach scales, and mixed-effects modeling results further concluded that variation in spawning activity at the reach scale (variance = 1.34, SD = 1.16) accounted for more variability and was more predictive than at the stream scale(variance = 0.04, SD = 0.19). This is important because fish habitat-associations identified at the reach scale were not identified at the stream scale. These results highlight the need for multi-scale habitat data collections and analyses to identify the most meaningful fish-habitat associations.
Download or read book Inriver Abundance and Distribution of Spawning Susitna River Sockeye Salmon Oncorhynchus Nerka 2007 written by Richard Yanusz and published by . This book was released on 2011 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates of sockeye salmon Oncorhynchus nerka escapement to the Susitna River were determined via a capture-recapture experiment, which was conducted using radio tags, fish wheels, and weirs in 2007.
Download or read book Inriver Abundance and Distribution of Spawning Susitna River Sockeye Salmon Oncorhynchus Nerka 2006 written by Richard Yanusz and published by . This book was released on 2007 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Abundance of Chum Salmon Oncorhynchus Keta in the Upper Yukon River Basin as Determined by a Radio written by P. A. Milligan and published by . This book was released on 1984 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Spawning Habitat Potential for Chum Oncorhynchus Keta and Pink Salmon O Gorbuscha in Relation to Landscape Characteristics in Coastal Southeast Alaska written by and published by . This book was released on 2018 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to the increasing need for ecosystem services throughout the Southeast Alaska region, decision makers are tasked with balancing the need for natural resources with salmon conservation. However, accurate historical and current information on salmonid population abundance, freshwater distribution, and habitat quality are sparse with limited resolution for large portions of this remote and rugged landscape. Here, I created Intrinsic Potential (IP) models for chum and pink salmon to predict the potential for portions of coastal rivers to provide high-quality spawning habitat. I developed IP models for both species from field redd surveys and synthetic habitat variables derived from 1-m resolution digital elevation models. The surveys were performed at 49 study reaches in five coastal drainage basins on the north end of Chichagof Island, Southeast Alaska.
Download or read book Spawning Areas and Abundance of Chinook Salmon Oncorhynchus Tshawytscha In the Columbia River Basin written by Leonard A. Fulton and published by Forgotten Books. This book was released on 2018-02-21 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Spawning Areas and Abundance of Chinook Salmon (Oncorhynchus Tshawytscha) In the Columbia River Basin: Past and Present Spawn in intermediate and large tribu taries and in middle reaches of the main stem. Spring-run chinook salmon Spawn in some lower Columbia River tributaries such as the Willamette, Cowlitz, and Kalama Rivers. They also are distributed in middle tributaries of the Columbia and Snake Rivers. (fall-run chinook salmon, discussed later in the report, share spawning grounds in some sections of the Cowlitz and Kalama Rivers.) These are not all of the areas in which such duplications occur but are cited as examples. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Susitna River Chinook Salmon Abundance and Distribution 2018 2020 written by Nicholas A. Decovich and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adult Chinook salmon abundance and distribution were estimated for the Susitna River drainage in 2018–2020 for the 6th through 8th consecutive years. Abundance estimates for the mainstem Susitna River above river mile (RM) 34 were produced using mark–recapture techniques to deploy tags on fish caught via fish wheel and gillnet at a site in the lower river (RM 34) and recover tags using a passive integrated transponder (PIT) tag detection system at the Deshka River weir site. Spawning distribution was assessed with radiotelemetry for 2019 and 2020 only. Fish were radiotagged at the lower river tag deployment site and tracked along their spawning migration with an array of fixed-antenna tracking stations. Upstream movement of each tag was categorized into 1 of 5 stocks: Chulitna River, upper Susitna River (RM 102.4–153.4), Deshka River, Eastside Susitna River, or Talkeetna River. The estimated mainstem Susitna River abundance at RM 34 (and 95% confidence intervals) of Chinook salmon ≥500 mm mid eye to tail fork (METF) length for 2018, 2019, and 2020 were 30,605 (23,262–40,396), 57,927 (42,843–78,118), and 62,346 (45,245–87,888), respectively. For 2018–2019, the abundance estimated for Chinook salmon in the Eastside Susitna River group was 14,121 (SE = 3,473) and 21,933 (SE = 5,107) fish, respectively, and accounted for the largest proportions (24% and 35%, respectively) of the mainstem Susitna River estimate.
Download or read book Fish Distribution and Abundance in the Upper and Middle lower Susitna River Studies 9 5 and 9 6 Draft Chinook and Coho Salmon Identification Protocol written by and published by . This book was released on 2014 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes the need for standarizing sampling techniques used to collect data for phenotype variation in juvenile chinook and coho salmon as part of studies for the Susitna-Watana Hydroelectric Project.
