Abundance and Spawning Distribution of Susitna River Chum Oncorhynchus Keta and Coho O. Kisutch Salmon, 2011 PDF Download
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Author: Peter Mallon Cleary Publisher: ISBN: Category : Chum salmon Languages : en Pages : 52
Book Description
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.
Author: Peter Mallon Cleary Publisher: ISBN: Category : Chum salmon Languages : en Pages : 52
Book Description
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.
Author: Richard J. Yanusz Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 31
Book Description
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.
Author: Richard Yanusz Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 38
Book Description
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.
Author: Richard Yanusz Publisher: ISBN: Category : Escapement (Fisheries) Languages : en Pages : 44
Book Description
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.
Author: Richard Yanusz Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 40
Book Description
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.
Author: Publisher: ISBN: Category : Chum salmon Languages : en Pages : 93
Book Description
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.
Author: Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 178
Book Description
A cooperative study involving the Department of Fisheries and Oceans Canada, the Alaska Department of Fish and Game, and the Taku River Tlingit First Nation was conducted to estimate the number of spawning Chinook salmon Oncorhynchus tshawytscha in the Taku River in 2003 with a mark-recapture experiment. Fish were captured at Canyon Island on the lower Taku River with fish wheels from May through August and were individually marked with back-sewn, solid-core spaghetti tags. All tagged fish were also batch marked with an opercle punch plus removal of the left axillary appendage. Sampling on the spawning grounds in tributaries was used to estimate the fraction of the population that had been marked. The estimated spawning abundance of small Chinook salmon ( 400 mm long; mid-eye to fork of tail) was 3,489 (SE = 1,052). Spawning abundance of medium-size Chinook salmon (401-659 mm) was estimated to be 16,780 (SE = 2,274). Finally, spawning abundance of large-size fish (= 660 mm) was estimated to be 36,435 (SE = 6,705), and the estimated total of all fish was 56,704 (SE = 7,158). The sum of the peak aerial survey counts of large spawning Chinook salmon conducted at five index tributaries of the Taku River was 16% of the mark-recapture estimate. Age 1.3 fish (1998 brood year) constituted an estimated 40% of the spawning population, followed by age 1.2 fish (1999 brood year), which constituted an estimated 29% of the population
Author: Peter Mallon Cleary
Author: Peter Mallon Cleary
Author: Peter Mallon Cleary
Author: Richard J. Yanusz
Author: Richard G. Bakkala
Author: Richard Yanusz
Author: Richard Yanusz
Author: Richard Yanusz
Author: Richard Yanusz
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