Estimation of Yukon River Salmon Passage in 2001 Using Hydroacoustic Methodologies PDF Download

Author: Carl Thomas Pfisterer
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 57

View

Book Description
Daily passage estimates for chinook salmon (Oncorhynchus tshawytscha) and summer and fall chum salmon (Oncorhynchus keta) are provided for the corresponding 2001 Yukon River escapement. A two component process was utilized: estimation of total fish passage via a single-beam sonar at the confluence of the Yukon and Atchuelinguk rivers, and estimation of species proportions by sampling with a series of gillnets near the same (Pilot Station) site.

Author: Douglas W. Lieb
Publisher:
ISBN:
Category : Chum salmon
Languages : en
Pages : 56

View

Book Description

Author: David H. Johnson
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 504

View

Book Description
This is the first publication to collect, standardize, and recommend a scientifically rigorous set of field protocols for monitoring and assessing salmon and trout populations. Includes five additional techniques that can be used with any of the 13 principle methods to supplement information gathered.Over four dozen fisheries experts throughout the U.S. Pacific Northwest and beyond contributed their time to pick, write, and review the most reliable protocols for enumerating salmonids in the field. Presented in an easy to use format, each of the 18 peer-reviewed protocols covers objectives, sample design, data handling, personnel and operational requirements, and field and office techniques, including survey forms.Standardized monitoring protocols will improve data reliability, maximize opportunities for data sharing and data set comparability, and ultimately improve the ability to assess status and trends. The Handbook will also support consistency in data collection for salmonids at the international level.

Author: Ann B. Crane
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 40

View

Book Description
This reports on the results of using the Dual-Frequency Identification Sonar (DIDSON) and split-beam sonar equipment, which were used to estimate Chinook salmon, Oncorhynchus tshawytscha, and fall chum salmon, Oncorhynchus keta, passage in the Yukon River near Eagle, Alaska from July 3 to October 6, 2010. This continued long-term hydroacoustic enumeration project for Chinook and chum salmon near the United States/Canada border will help fishery managers meet conservation and management commitments made by both countries under the Yukon River Salmon Agreement.

Author: Elizabeth A. Smith
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 42

View

Book Description
This reports on the results of using the Dual-Frequency Identification Sonar (DIDSON) and split-beam sonar equipment, which were used to estimate Chinook salmon, Oncorhynchus tshawytscha, and fall chum salmon, Oncorhynchus keta, passage in the Yukon River near Eagle, Alaska from July 5 to October 6, 2011. This continued long-term hydroacoustic enumeration project for Chinook and chum salmon near the United States/Canada border will help fishery managers meet conservation and management commitments made by both countries under the Yukon River Salmon Agreement.

Author: Jody D. Lozori
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 78

View

Book Description
The Pilot Station sonar project has provided daily passage estimates for Chinook (Oncorhynchus tshawytscha), chum (O. keta), and coho (O. kisutch) salmon for most years since 1986. Fish passage estimates for each species were generated in 2010 using a 2-component process: (1) estimation of total fish passage using 120 kHz split-beam sonar and a dual-frequency identification sonar (DIDSON), and (2) apportionment to species by sampling using a suite of gillnets of various mesh sizes. An estimated 3,683,588 fish passed through the sonar sampling area between June 1 and September 7. Of those fish, 662,329 passed along the right bank and 3,021,259 passed along the left bank. Included, with 90% confidence intervals, were 112,605 ± 49,275 large Chinook salmon (>655 mm mideye tail fork), 25,294 ± 36,165 small Chinook salmon (=655 mm mideye tail fork), 1,423,372 ± 89,356 summer chum salmon, 458,103 ± 40,797 fall chum salmon, 177,724 ± 12,489 coho salmon, 919,036 ± 63,942 pink salmon, 281,456 ± 37,151 cisco, 175,749 ± 21,348 humpback whitefish, 19,835 ± 6,581 broad whitefish, 49,250 ± 31,895 sheefish, and 41,164 ± 29,700 other species.

Author: Jody D. Lozori
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 74

View

Book Description
Results of a Yukon River sonar project, which provided estimates of Chinook salmon Oncorhynchus tshawytscha, chum salmon O. keta, and coho salmon O. kisutch daily passage on the Yukon River near Pilot Station, Alaska. Fish passage estimates for each species were generated in 2011 through a two-component process: (1) estimation of total fish passage with 120 kHz split-beam sonar and a Dual Frequency Identification Sonar (DIDSON), and (2) apportionment to species by sampling with a suite of gillnets of various mesh sizes.

Author: Jody D. Lozori
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 75

View

Book Description
Results of a Yukon River sonar project, which provided estimates of Chinook salmon Oncorhynchus tshawytscha, chum salmon O. keta, and coho salmon O. kisutch daily passage on the Yukon River near Pilot Station, Alaska. Fish passage estimates for each species were generated in 2008 through a two-component process: (1) estimation of total fish passage with 120 kHz split-beam sonar and a Dual Frequency Identification Sonar (DIDSON), and (2) apportionment to species by sampling with a suite of gillnets of various mesh sizes.

Author: Holly C. Carroll
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 76

View

Book Description
Results of a Yukon River sonar project, which provided estimates of Chinook salmon Oncorhynchus tshawytscha, chum salmon O. keta, and coho salmon O. kisutch daily passage from June 5-August 31, 2006, on the Yukon River near Pilot Station, Alaska. Fish passage estimates for each species were generated through a 2-component process: (1) estimation of total fish passage with 120 kHz split-beam sonar and a Dual Frequency Identification Sonar (DIDSON), and (2) apportionment to species by sampling with a suite of gillnets of various mesh sizes.

Author: Holly C. Carroll
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 74

View

Book Description
Results of a Yukon River sonar project, which provided estimates of Chinook salmon Oncorhynchus tshawytscha, chum salmon O. keta, and coho salmon O. kisutch daily passage from June 2-August 31, 2007, on the Yukon River near Pilot Station, Alaska. Fish passage estimates for each species were generated through a 2-component process: (1) estimation of total fish passage with 120 kHz split-beam sonar and a Dual Frequency Identification Sonar (DIDSON), and (2) apportionment to species by sampling with a suite of gillnets of various mesh sizes.