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Thursday, August 6, 2020 | History

2 edition of Abundance and age-sex-size composition of the 1987 Salcha River chinook salmon escapement found in the catalog.

Abundance and age-sex-size composition of the 1987 Salcha River chinook salmon escapement

Calvin Skaugstad

Abundance and age-sex-size composition of the 1987 Salcha River chinook salmon escapement

by Calvin Skaugstad

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Published by Alaska Dept. of Fish and Game, Division of Sport Fish in Juneau, Alaska .
Written in English

    Subjects:
  • Chinook salmon -- Alaska -- Salcha River Watershed.

  • Edition Notes

    Other titlesAbundance and age, sex, size composition of the 1987 Salcha River chinook salmon escapement.
    Statementby Cal Skaugstad.
    SeriesFishery data series -- no. 37.
    ContributionsAlaska. Division of Sport Fish.
    The Physical Object
    Paginationiii, 25 p. :
    Number of Pages25
    ID Numbers
    Open LibraryOL15578226M

      We focus on juvenile fall-run Chinook salmon due to the their use of off-channel habitats during the study period. Fall-run Chinook salmon have an “ocean-type” life history (Healey ) and are currently the largest of the four runs in the Sacramento River (Yoshiyama et al. ).Fall-run adult migration peaks during September and October and spawning occurs soon after adults reach their. South Fork of the Salmon River subbasin. The project has involved noninvasive monitoring of Chinook salmon escapement on the Secesh River between and and on Lake Creek since The overall goal of this project is to accurately estimate adult Chinook salmon spawning escapement numbers to the Secesh River and Lake Creek.

      Upriver movements were determined for Chinook salmon Oncorhynchus tshawytscha returning to the Yukon River, a large, virtually pristine river basin. These returns have declined dramatically since the late s, and information is needed to better manage the run and facilitate conservation efforts. A total of 2, fish were radio tagged during – Stock identification of Columbia River chinook salmon and steelhead trout. Report to U.S. Dep. Energy, Contract DE-ABP, Project , p. Available Bonneville Power Administration, P.O. Box , Portland, OR

    Faurot, Dave, Paul Kucera, "Adult Chinook Salmon Abundance Monitoring in the Secesh River and Lake Creek, Idaho", Annual Report, Project No. , electronic pages, (BPA Report DOE/BP) Bonneville Power Administration P.O. Box Portland, OR This report was funded by the Bonneville Power Administration (BPA). Chinook salmon producing tributary of the Naknek River. In , Big Creek had a Chinook salmon return of 10, fish. It originates in the mountains south of Brooks Lake in Katmai National Park and flows northwest for approximately 60 km before joining the Naknek River. Big Creek is a clear water stream with a maximum width of.


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Abundance and age-sex-size composition of the 1987 Salcha River chinook salmon escapement by Calvin Skaugstad Download PDF EPUB FB2

The Kenai dataset was from commercial mixed-stock gillnet harvests of predominantly Kenai River Chinook salmon (three-year average stock composition of 69% Kenai River fish), but also included small portions of fish from the Kasilof River and other Cook Inlet stocks. We also included datasets for two weirs (Kogrukluk and Deshka rivers) and the Cited by:   Juvenile Chinook Salmon (Oncorhynchus tshawytscha) abundance in the northern Bering Sea is used to provide insight into future returns and fisheries in the Yukon status of Yukon River Chinook Salmon is of concern due to recent production declines and subsequent closures of commercial, sport, and personal use fisheries, and severe restrictions on subsistence fisheries in the Yukon by: 8.

Trends in abundance of chinook salmon (Oncorhynchus tshawytscha) of the Nechako River, a tributary of the Fraser River, were analyzed to quantify the ecological effects of water abstraction for electricity years when the majority of returning chinook adults used the upper Nechako River for spawning, the survival of offspring for the entire river was poorer than in years when Cited by:   Though different methods were used across time and space, GrandTab is the only continuous historical dataset available for California Chinook salmon escapement estimates (Albertson et al.

), and it is the primary source used by fishery management agencies (Carlson and Satterthwaite ). Only estimates of in-river spawning adults in the Cited by: 4. Summary of John Day River Chinook Salmon spawning ground survey carcass recovery sex and age composition for the brood years.

River Chinook Salmon cohort abundance at. Distribution, abundance, habitat preference, migration and residence timing, seawater tolerance, and size were determined for juvenile ocean-type (age 0) chinook salmon (Oncorhynchus tshawytscha) in the Situk River, Alaska.

Chinook primarily occupied main-stem habitats (channel edges in spring, pools and willow edges in summer). Peak chinook. Adult Fall-run Chinook Salmon Chinook salmon spawning runs in the Tuolumne River have been monitored to some degree sincewith estimates of adult escapement available for all years since Counts of migrating adult salmon were made at a weir in Modesto at river kilometer (rkm) by the California Department of Fish.

Lower Calaveras River Chinook Salmon and Steelhead Limiting Factors Analysis E:\Final_Report_mrs_jrrdoc Stillwater Sciences Figure 5 Location and size class of larger pools in the lower Calaveras River.

Chinook salmon counts at the Deshka River weir were consistently o fish from tobut since then have been less t fish, and the count was below the minimum escapement goal in and Most of the harvest of Susitna River Chinook salmon is by the inriver sport fishery.

Juvenile Chinook salmon abundance indices have been estimated forfrom these pelagic trawl surveys. Despite limited years of data, surveys have provided important insights for the early marine life histories of Yukon River Chinook salmon. The stock composition estimates highlight the Columbia River basin as a major source of juvenile Chinook salmon in the Northeast Pacific and complement the well-documented contributions of the basin's adult Chinook salmon to commercial and recreational fisheries in Alaska and British Columbia (Beacham et al., ; Gilk-Baumer et al., The size, distribution, and abundance of juvenile chinook salmon (Oncorhynchus tshawytscha) were measured in the upper km of the Nechako River during as part of the tenth year of the Nechako Fisheries Conservation Program (NFCP).

Movement rates for individual Yukon River Chinook salmon returning to the Salcha and Big Salmon rivers during – It is important to understand that the variation represented by Axis 1 and Axis 2 reflect a continuum in the migratory patterns exhibited by. The patterns in abundance of chinook salmon described strictly in numerical terms mask an important shift in resource quality that took place between and Abundance and Age-Sex-Size Composition of Chum Salmon Escapements in the Chena and Salcha Rivers, bY Since the same techniques have been used for chinook salmon and the average (CV) of abundance estimates has been % for the Salcha River (, Skaugstad In prep) and % for the Chena River (, Evenson In prep), a.

Chinook salmon sexually mature between the ages of 2 and 7 but are typically 3 or 4 years old when they return to spawn. Chinook dig out gravel nests (redds) on stream bottoms where they lay their eggs. All Chinook salmon die after spawning.

Young Chinook salmon feed on terrestrial and aquatic insects, amphipods, and other crustaceans. It has been estimated that in the Nineteenth Century, Chinook escapement in the basin could have numberedwith approximately 40% returning to spawn in the McKenzie River subbasin.

Since then, the wild Chinook population has decreased dramatically, with only two of seven subbasin populations still considered viable. Figure Estimated hatchery and wild Chinook salmon escapement at Lower Granite Dam, spawn year Confidence intervals are at 95%.

44 Figure Estimated escapement by age class, grouped by smolt migration year (MY), of wild adult Chinook salmon at. Valley that use size and date of capture to estimate race of juvenile Chinook salmon in the lower Sacramento River and Delta.

The size criterion was developed by Frank Fisher (Fisher ), of CDFG in as a weekly model of Chinook salmon growth and later modified to a daily criterion by Sheila Greene of California Department of Water Resources.

abundance, exploitation, and decline in the Central Valley region is essentially a history of the chinook salmon runs. Hereafter, reference to ‘‘salmon’’ is to chinook salmon, unless otherwise indicated. The once-great Central Valley salmon runs have been diminished over time.

Major populations in some tributary streams have been. In, andspawning adult Chinook salmon were collected from the Salcha River, Alaska, USA, and the prevalence of Ichthyophonus in these fish was, and %, respectively. Nicholas JW, Hankin DG () Chinook salmon populations in Oregon coastal river basins: description of life histories and assessment of recent trends in run strengths.

Info. Rep. 88–1. Portland: Oregon Department of Fish and Wildlife. p. Bell J, Kent S () Chinook salmon fecundity in the Unalakleet River, –  Accurate determination of adult salmon spawner abundance is key to the assessment of recovery actions for wild Snake River spring/summer Chinook salmon (Onchorynchus tshawytscha), a species listed as 'threatened' under the Endangered Species Act (ESA).

As part of the Bonneville Power Administration Fish and Wildlife Program, the Nez Perce Tribe operates an experimental project in the .