Assessment of Chinook, Chum, and Coho Salmon Escapements in the Holitna River Drainage Using Radiotelemetry, 2001-2003 PDF Download

Author: Steven M. Stroka
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ISBN:
Category : Chinook salmon
Languages : en
Pages : 62

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Author: Klaus G. Wuttig
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ISBN:
Category : Chinook salmon
Languages : en
Pages : 42

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Author: Steven M. Stroka
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 42

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Category : Fish surveys
Languages : en
Pages : 0

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This report describes research conducted from 2001 to 2006 to investigate use of the mainstem Columbia River below The Dalles, John Day and McNary dams by spawning fall Chinook salmon through deep water redd surveys. Initial reconnaissance level surveys conducted in 2001 documented salmon redds below John Day Dam. No redds were observed below The Dalles or McNary dams and researchers concluded that spawning habitat conditions below The Dalles were not conducive to spawning, however, conditions appeared to be well suited below McNary Dam. Comprehensive redd surveys were subsequently conducted below John Day Dam from 2002 to 2006. However, 2006 surveys were incomplete because of high turbidities. No surveys were conducted below the other dams in any other years, but researchers recommended additional surveys below McNary Dam. Redd surveys documented a low of 96 redds in 2002 and a high of 183 in 2004. Expanded estimates for a total redd population below John Day Dam ranged from 880 to 1,597 redds for the same years. A run reconstruction exercise was conducted for the John Day Dam tailrace, to determine what the adult escapement may have been with index escapement estimates ranging from 20,362 (2005) to 57,823 (2003) adult fall Chinook salmon for the comprehensively sampled period (2002 – 2005).

Author: Gene J. Sandone
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ISBN:
Category : Chinook salmon
Languages : en
Pages : 81

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After decades of using the DFO mark-recapture border program as the sole U.S./Canada border passage estimator oil the Yukon River, the cooperative ADF&G-NOAA drainage-wide radio telemetry project and ADF&G-DFO sonar projects provided independent estimates of border passage for 2002-2004 and 2005- 2007, respectively. Marked and variable differences between the annual DFO mark-recapture estimates and estimates derived from radio telemetry and sonar projects strongly suggests that the DFO mark- recapture estimate was biased low and a new sonar-based escapement goal was necessary. An exploratory analysis was initiated to reconstruct the historic drainage escapement database and make it compatible with new sonar-based escapement estimates. Analyses were conducted that ranged from simple scaling of historical data to more robust regression models. Seventeen escapement databases were created through these analyses. Ultimately, four escapement databases, reconstructed from drainage escapements derived from radio telemetry and sonar projects (2002-2007) and regressed against escapement indices, were considered viable candidates. A secondary goal of these analyses was to investigate potential escapement goal ranges based oil the viable escapement databases. Interestingly, all Sustainable Escapement Goal (SEG) ranges and Marcov Table analysis indicated similar escapement goals for all four reconstructed escapement database scenarios. Spawner-recruit statistics were also very similar. Therefore, two escapement goal recommendations were suggested: 1) Set a conservative escapement goal range that reflected all escapement database scenarios, 40,000 to 60,000 Chinook salmon, and 2) Do not select a reconstructed escapement database for the period 1982-2001, but build on the current escapement database derived from radio-telemetry estimates (2002-2004) and sonar counts (2005-present).

Author: Reed A. Duston
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ISBN:
Category :
Languages : en
Pages : 70

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From January to July of 2003, 42 entrapments and 25 stranding sites were examined on the Columbia River near Ives Island, downstream of Bonneville Dam. A total of 6,122 salmonids, consisting of three different species, were collected at these sites (Table 1). The fish sampled during this time were chinook salmon (69%), chum salmon (7%), and coho salmon (24%). The following analysis of the relationship between environmental factors and salmon placed at risk by river level fluctuations focuses on each of these three salmon species.

Author: Lisa Ann Stuby
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ISBN:
Category : Chinook salmon
Languages : en
Pages : 64

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During 2016 the Alaska Department of Fish and Game conducted salmon enumeration projects on the Chena, Salcha, and Delta Clearwater rivers in the Tanana River drainage. Chinook salmon Oncorhynchus tshawytscha escapements for the Chena and Salcha rivers were estimated using tower-counting techniques with the addition of sonar (DIDSON and ARIS) methodology as a secondary means of enumeration when high-water events precluded visual counts. A Bayesian mixture model was used to apportion species from the sonar files. Coho salmon Oncorhynchus kisutch escapement in the Delta Clearwater River was estimated by a visual boat survey at peak escapement. The counting towers operated on 26 June for the Chena River and 26 June-3 July and 11-17 July for the Salcha River until high, muddy water precluded visual counts. Sonars could not be operated due to flooding from 19 July-5 August for the Chena River and during 19-26 July and 31 July-5 August for the Salcha River. A Bayesian hierarchical model was used to estimate salmon abundance for days when the sonars were not operating. Estimated Chinook salmon escapement for the Chena River was 6,665 (SE = 363) and 2,675 (SE = 313) for the Salcha River. Due to flooding and sonar placement, the abundance estimate for the Salcha River represents a minimum. During the carcass surveys 388 and 503 Chinook salmon were collected from the Chena and Salcha rivers respectively to estimate the age, sex, and length composition of the escapement. Dominant age classes were age 1.2 (0.43) for males and age 1.3 (0.14) for females for the Chena River and 1.2 (0.37) for males and age 1.3 (0.17) for females for the Salcha River. Estimated proportion of females was 0.22 (SE = 0.02) and the proportion adjusted for gender-bias was 0.16 (SE = 0.03) for the Chena River and 0.38 (SE = 0.02) and gender-bias adjusted was 0.33 (SE = 0.07) for the Salcha River. Mean length of females in the Chena River escapement was 771 mm and 629 mm for males and the mean length of females in the Salcha River escapement was 746 mm and 631 mm for males. Chum salmon Oncorhynchus keta escapement for the Chena and Salcha rivers was 6,493 (SE = 427) and 2,897 (SE = 177), respectively. Because counting operations ceased during the chum run, these counts were considered incomplete. The peak escapement count of coho salmon escapement in the Delta Clearwater River on 26 October was 6,767.

Author: Allison N. Matter
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 62

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During 2018, the Alaska Department of Fish and Game conducted salmon enumeration projects on the Chena, Salcha, and Delta Clearwater Rivers in the Tanana River drainage. Chinook salmon Oncorhynchus tshawytscha escapements for the Chena and Salcha Rivers were estimated using tower-counting techniques with the addition of sonar (DIDSON and ARIS) apportionment, interpolation, and a Bayesian hierarchical model as a means of enumeration when high-water events precluded visual counts. The Chena River counting tower and sonars operated from 27 June until 10 August, and the final escapement estimate was 5,947 (SE = 226) Chinook salmon. The adjusted sex composition was 0.63 (SE = 0.07) male and 0.37 (SE = 0.07) female (n = 348). The dominant age class was 1.3 for males (41% of total escapement) and 1.4 for females (28% of total escapement). The Salcha River counting tower and sonars operated from 27 June until 10 August and the final escapement estimate was 4,195 (SE = 205) Chinook salmon. The adjusted sex composition was 0.65 (SE = 0.07) male and 0.35 (SE = 0.07) female (n=504). Like the Chena River, the dominant age class was 1.3 for males (31% of total escapement) and 1.4 for females (35% of total escapement). Incomplete chum salmon Oncorhynchus keta escapements for the Chena and Salcha Rivers were estimated to be 13,084 (SE = 1705) and 39,996 (SE = 8,095), respectively. Coho salmon Oncorhynchus kisutch escapement in the Delta Clearwater River was estimated as 2,884 fish by a visual boat survey at peak escapement on 7 November.

Author: Allison N. Matter
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 0

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Book Description
During 2017, Alaska Department of Fish and Game conducted salmon enumeration projects on the Chena, Salcha, and Delta Clearwater Rivers in the Tanana River drainage. Chinook salmon Oncorhynchus tshawytscha escapements for the Chena and Salcha Rivers were estimated using tower-counting techniques with the addition of sonar (DIDSON and ARIS) methodology as a secondary means of enumeration when events precluded visual counts. A Bayesian mixture model was used to apportion species from the sonar files. The Chena River counting tower and sonars operated from 26 June-3 August and the final escapement estimate was 5,235 (SE = 321) Chinook salmon. The adjusted sex composition was 0.67 (SE = 0.03) male and 0.33 (SE = 0.03) female (n = 420). The dominant age class was 1.3 for both males (28% of total sample) and females (46% of total sample). The Salcha River counting tower and sonars operated from 27 June-4 August and the final escapement estimate was 4,195 (SE = 205) Chinook salmon. The adjusted sex composition was 0.65 (SE = 0.07) male and 0.35 (SE = 0.07) female (n = 504). Like the Chena River, the dominant age class was 1.3 for both males (49% of total sample) and females (23% of total sample). Incomplete chum salmon Oncorhynchus keta escapement for the Chena and Salcha Rivers was estimated to be 21,176 (SE = 994) and 20,093 (SE = 1,220), respectively. Coho salmon Oncorhynchus kisutch escapement in the Delta Clearwater River was estimated as 9,617 fish by a visual boat survey at peak escapement on 26 October.

Author:
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ISBN:
Category :
Languages : en
Pages : 34

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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 South Fork of the Salmon River subbasin. The project has involved noninvasive monitoring of Chinook salmon escapement on the Secesh River between 1997 and 2000 and on Lake Creek since 1998. The overall goal of this project is to accurately estimate adult Chinook salmon spawning escapement numbers to the Secesh River and Lake Creek. Using time-lapse underwater video technology in conjunction with their fish counting stations, Nez Perce researchers have successfully collected information on adult Chinook salmon spawner abundance, run timing, and fish-per-redd numbers on Lake Creek since 1998. However, the larger stream environment in the Secesh River prevented successful implementation of the underwater video technique to enumerate adult Chinook salmon abundance. High stream discharge and debris loads in the Secesh caused failure of the temporary fish counting station, preventing coverage of the early migrating portion of the spawning run. Accurate adult abundance information could not be obtained on the Secesh with the underwater video method. Consequently, the Nez Perce Tribe now is evaluating advanced technologies and methodologies for measuring adult Chinook salmon abundance in the Secesh River. In 2003, the use of an acoustic camera for assessing spawner escapement was examined. Pacific Northwest National Laboratory, in a collaborative arrangement with the Nez Perce Tribe, provided the technical expertise to implement the acoustic camera component of the counting station on the Secesh River. This report documents the first year of a proposed three-year study to determine the efficacy of using an acoustic camera to count adult migrant Chinook salmon as they make their way to the spawning grounds on the Secesh River and Lake Creek. A phased approach to applying the acoustic camera was proposed, starting with testing and evaluation in spring 2003, followed by a full implementation in 2004 and 2005. The goal of this effort is to better assess the early run components when water clarity and night visibility preclude the use of optical techniques. A single acoustic camera was used to test the technology for enumerating adult salmon passage at the Secesh River. The acoustic camera was deployed on the Secesh at a site engineered with an artificial substrate to control the river bottom morphometry and the passage channel. The primary goal of the analysis for this first year of deployment was to validate counts of migrant salmon. The validation plan involved covering the area with optical video cameras so that both optical and acoustic camera images of the same viewing region could be acquired simultaneously. A secondary test was contrived after the fish passage was complete using a controlled setting at the Pacific Northwest National Laboratory in Richland, Washington, in which we tested the detectability as a function of turbidity levels. Optical and acoustic camera multiplexed video recordings of adult Chinook salmon were made at the Secesh River fish counting station from August 20 through August 29, 2003. The acoustic camera performed as well as or better than the optical camera at detecting adult Chinook salmon over the 10-day test period. However, the acoustic camera was not perfect; the data reflected adult Chinook salmon detections made by the optical camera that were missed by the acoustic camera. The conditions for counting using the optical camera were near ideal, with shallow clear water and good light penetration. The relative performance of the acoustic camera is expected to be even better than the optical camera in early spring when water clarity and light penetration are limited. Results of the laboratory tests at the Pacific Northwest National Laboratory facility indicated that the detection rate for the acoustic camera system was essentially 100% across all levels of turbidity in the experiments. Overall, the acoustic camera outperformed the optical camera at detecting fish, both in the laboratory tank and at the Secesh River fish counting station. However, the optical camera approach still offers some advantages over the acoustic camera under certain limited circumstances. The primary advantages are better species, gender and condition determination and better separation of debris from fish moving downstream. Using both systems in parallel will provide the most robust and accurate platform for counting fish in the field by exploiting the relative strengths of both systems through the season.