Download or read book Anchor River Chinook Salmon Escapement 2011 written by Carol M. Kerkvliet and published by . This book was released on 2018 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2011 Anchor River Chinook salmon (Oncorhynchus tshawytscha) escapement was censused using dual-frequency identification sonar (DIDSON) during high spring flows and by a resistance board weir when flows subsided. The Chinook salmon escapement, an estimated 3,545 fish, fell below the sustainable escapement goal (SEG) range of 3,800?10,000 Chinook salmon and was the second lowest on record. The midpoint of the Chinook salmon run was 16 June. The Chinook salmon daily escapement counts were positively correlated (r = 0.41, df = 43, P = 0.0052) with average daily river stage. The dominant age class was ocean age 3 (41.1%, SE 2.9%). Overall mean length of males (648 mm, SE 7.5 mm) was smaller than that of females (751 mm, SE 8.4 mm).

Download or read book Anchor River Chinook Salmon Escapement 2014 written by Carol M. Kerkvliet and published by . This book was released on 2020 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2014, the Anchor River Chinook salmon (Oncorhynchus tshawytscha) escapement was fully enumerated with combined daily counts from the north and south forks of the Anchor River using weirs fitted with underwater video systems. The 2014 escapement (2,499) fell below the sustainable escapement goal (SEG) range of 3,800-10,000 Chinook salmon. It was the lowest escapement observed since Chinook salmon were first fully enumerated on the Anchor River in 2003. A series of emergency orders were issued in 2014 that restricted the inriver and nearby marine sport fisheries. The midpoint of the combined north and south fork Chinook salmon runs occurred on 15 June. No correlation was detected between daily Chinook salmon counts on the south fork and average river stage or average river temperature. Age composition was estimated from samples collected during weekly beach seining in the mainstem, downstream of the weirs. The dominant age class was ocean age 3 (40.4%; SE 3.0%). No significant differences were detected between mean lengths of ocean-age-3 males and females or between ocean-age-4 males and females. There were no significant differences between the proportion Chinook salmon ≤508 mm total length collected from beach seine samples and video weir observations. The escapement and age composition data will be used in a spawner-recruit analysis to derive appropriate escapement goals.

Download or read book Anchor River Chinook Salmon Escapement 2015 written by Carol M. Kerkvliet and published by . This book was released on 2020 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2015 Anchor River Chinook salmon (Oncorhynchus tshawytscha) escapement (10,241) exceeded the sustainable escapement goal (SEG) range of 3,800–10,000 Chinook salmon. Escapement was more than twice the average of recent low-productivity years (2009–2014) and was more similar to the large escapements from 2003 to 2005. Some preseason emergency orders that restricted the inriver and nearby marine sport fisheries were rescinded as a result of the unexpectedly strong run. Escapement was based on combined counts collected on the north and south forks of the Anchor River using weirs fitted with an underwater video system in the passage chute. The midpoint of the combined Chinook salmon run was 15 June. Daily Chinook salmon counts on the south fork and average south fork river stage were significantly correlated. Age composition was determined from samples collected during weekly beach seining downstream of the weirs. The dominant age class was ocean age 3 (44.6% SE 2.6%). No significant difference was detected between the length of ocean-age-3 males and females, but there was a significant difference in the average length of the sexes for ocean-age-2 and ocean-age-4 fish. There was no significant difference between the sex composition collected from beach seine samples and that observed at the video weirs, but there was a significant difference in the proportion of jacks captured in the beach seine and that observed at the video weirs.

Download or read book Stock Status and Recommended Escapement Goal for Anchor River Chinook Salmon written by Nicole J. Szarzi and published by . This book was released on 2007 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Anchor River Chinook and Coho Salmon Escapement 2007 2008 written by Carol M. Kerkvliet and published by . This book was released on 2012 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Anchor River 2003 and 2004 Chinook Salmon and 2004 Coho Salmon Escapement written by Carol M. Kerkvliet and published by . This book was released on 2008 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chinook Salmon Escapement and Run Timing in the Gulkana River 2011 2012 written by Scott H. Maclean and published by . This book was released on 2013 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Anchor River Chinook and Coho Salmon Escapement 2009 written by Carol M. Kerkvliet and published by . This book was released on 2012 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the Anchor River Chinook salmon Oncorhynchus tshawytscha and coho salmon O. kisutch 2009 escapement estimates.

Download or read book Anchor River Chinook Salmon Escapement 2010 written by Carol M. Kerkvliet and published by . This book was released on 2018 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2010 Anchor River Chinook salmon (Oncorhynchus tshawytscha) escapement was estimated using dual-frequency identification sonar (DIDSON) during high spring flows and then censused using a resistance board weir when flows subsided. The Chinook salmon escapement, an estimated 4,449 fish (SE 103) fell below the lower bound of the sustainable escapement goal (SEG) of 5,000 fish and was the second lowest on record. The midpoint of the Chinook salmon run was 10 June. The Chinook salmon daily escapement counts were positively correlated (r = 0.56, df = 45, P

Download or read book Anchor River Chinook Salmon Escapement 2012 written by Carol M. Kerkvliet and published by . This book was released on 2018 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2012 Anchor River Chinook salmon (Oncorhynchus tshawytscha) escapement was estimated using a dual-frequency identification sonar (DIDSON) during high spring flows, and a resistance board weir fitted with an underwater video once flows subsided. Chinook salmon escapement (4,509 fish; SE 100) fell within the sustainable escapement goal (SEG) range of 3,800?10,000. The midpoint of the Chinook salmon run was 13 June. The daily Chinook salmon escapement counts were positively correlated with daily average river stage, but not with daily average river temperature. The Chinook salmon dominant age class was ocean age 3 (50.4%; SE 4.0%). Overall mean length of males (603 mm; SE 15.4) was smaller than that of females (755 mm; SE 7.4). The inriver sport fishery was restricted by a series of emergency orders, which resulted in the lowest estimated harvest (38 fish) on record.

Download or read book Anchor River Chinook Salmon Escapement 2013 written by Carol M. Kerkvliet and published by . This book was released on 2018 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2013 Anchor River Chinook salmon (Oncorhynchus tshawytscha) escapement (4,401 fish, SE 117) fell within the sustainable escapement goal (SEG) range of 3,800?10,000 fish. High river flows changed the channel morphology at the confluence of the north and south forks, which rendered the 2003?2012 mainstem dual-frequency identification sonar (DIDSON) site unsuitable for monitoring escapement. Thus, for the 2013 season, the DIDSON was relocated about 0.3 RKM downstream and was operated throughout the high-water period. Once flows subsided, 2 alternative escapement monitoring sites were identified upstream: 1 on the south fork and 1 on the north fork. The north fork site was located approximately 1.5 RKM upstream from the confluence and the south fork site was located approximately 0.2 RKM upstream of the confluence. Weirs and underwater video systems were used at both sites to monitor escapement. The midpoint of the Chinook salmon run was 19 June. The daily Chinook salmon escapement counts were positively correlated with daily average river stage, but not with daily average river temperature. The dominant age class was ocean age 3 (43.5%, SE 4.1%). Overall mean length of males (604 mm, SE 15) was smaller than that of females (734 mm, SE 25). The inriver sport fishery was restricted by a series of emergency orders that probably resulted in a near record low harvest of 97 fish.

Download or read book Anchor River Chinook and Coho Salmon Escapement Project 2005 2006 written by Carol M. Kerkvliet and published by . This book was released on 2010 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the Anchor River Chinook salmon Oncorhynchus tshawytscha and coho salmon O. kisutch escapement estimates, which were generated in 2005 and 2006 from Dual-frequency IDentification SONar (DIDSON) counts during high spring flows and counts through resistance board weir thereafter.

Download or read book Unalakleet River Chinook Salmon Escapement Monitoring and Assessment 2011 2012 written by Scott Kent and published by . This book was released on 2014 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Declining run sizes, coupled with state and federal restrictions and closures to the Unalakleet River Chinook salmon fisheries, have highlighted the need to obtain more complete estimates of the magnitude and age, sex, and length (ASL) composition of the spawning escapement.

Download or read book Chinook Salmon Escapement in the Chena Salcha and Goodpaster Rivers and Coho Salmon Escapement in the Delta Clearwater River 2011 2012 written by James William Savereide and published by . This book was released on 2014 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the 2011-2012 results from the Chinook and coho salmon counting projects on the Chena, Delta Clearwater, Goodpaster and Salcha Rivers.

Download or read book Operational Plan written by Holly I. Dickson and published by . This book was released on 2020 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2020-2024, Chinook salmon (Oncorhynchus tshawytscha) will be enumerated at 2 Anchor River sites from mid-May through early August to monitor escapement for the drainage. The south fork site, located at approximately river kilometer (RKM) 4.0, will be monitored by an Adaptive Resolution Imaging Sonar (ARIS) during high flow periods, and a resistance board weir fitted with underwater video will be used thereafter. The north fork site, located at about RKM 5.3, will be monitored by a resistance board weir with underwater video from the beginning of the Chinook salmon run in early May. Motion-detection technology will be used at each weir to record fish passage 24 hours per day. Weekly beach seine surveys will be used to capture Chinook salmon for age-sex-length (ASL) samples downstream of the confluence of the south and north forks. Chinook salmon data will be used to update estimates of the spawner-recruit relationship and harvest rate, and to provide inseason run information to managers. Coho salmon and steelhead will also be monitored in the fall of each year using the resistance board weir and video system on each fork. Coho salmon age, sex, and length will be collected via beach seining. Coho salmon escapement and harvest rate will be estimated along with an index of steelhead abundance and catch rate.

Download or read book Production Escapement and Juvenile Tagging of Chilkat River Chinook Salmon in 2011 written by Richard S. Chapell and published by . This book was released on 2014 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book West Cook Inlet Theodore and Lewis Rivers Chinook and Coho Salmon Escapement Studies 2012 2014 written by Nick Logelin and published by . This book was released on 2017 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2011, the Alaska Board of Fisheries (BOF) designated Chinook salmon (Oncorhynchus tshawytscha) in the Northern District of Cook Inlet, which includes the Theodore and Lewis rivers, to be a stock of yield concern. The purpose of this project was to determine whether the current escapement survey method of a single aerial survey, conducted annually during peak Chinook salmon spawning, provides a reliable index to manage these fisheries. From 2012 to 2014, resistance board weirs were installed on the Theodore and Lewis rivers to monitor Chinook salmon escapement for comparison to the aerial index survey. Weir operation was extended through the fall to enumerate coho salmon (O. kisutch) for the 2013 and 2014 runs. Because weirs on the Theodore and Lewis rivers had numerous inoperable periods when missed passage could not be estimated for 2013 (Lewis River) and 2014 (Lewis and Theodore rivers), reliable escapement estimates could not be made for these years. The only year when a comparison between the weir count and the aerial index survey could be made for the Lewis River was 2012. Of the 58 Chinook salmon that passed the Lewis River weir in 2012, 28 (48%) were counted above the weir by aerial survey. For the Theodore River, 129 (22%) and 434 (69%) of the 577 and 630 Chinook salmon that passed the weir were accounted for in the aerial surveys in 2012 and 2013, respectively. On the Theodore River in 2013, a total of 1,560 coho salmon passed the weir between 20 July and 31 August. On the Lewis River in 2013, a total of 413 coho salmon passed the weir between 30 July and 31 August. Coho salmon counts on the Theodore and Lewis rivers in 2014 were incomplete due to several periods when the weirs were inoperable because of high water.