Download or read book Postseason Sockeye and Chinook Salmon Escapement Estimates for the Karluk and Ayakulik Rivers and Dog Salmon Creek 1998 written by Nicholas H. Sagalkin and published by . This book was released on 2000 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age Composition and Spawning Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 1997 and 1998 written by Mark Clapsadl and published by . This book was released on 2002 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Mark recapture Experiment to Estimate the Escapement of Chinook Salmon in the Unuk River 1998 written by Edgar L. Jones (III.) and published by . This book was released on 1999 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of the Escapement of Chinook Salmon in the Unuk River in 2003 written by Jan L. Weller and published by . This book was released on 2004 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review of Salmon Escapement Goals in Bristol Bay Alaska 2006 written by Timothy T. Baker and published by . This book was released on 2006 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains recommendations after the Alaska Department of Fish and Game Escapement Goal Review Committee reviewed Pacific salmon, Oncorhynchus spp., escapement goals for the major river systems in Bristol Bay. Spawner-return data were evaluated for: sockeye salmon, O. nerka, in the Ugashik, Egegik, Kvichak, Naknek, Alagnak, Wood, Nushagak, Igushik, Togiak, and Kulukak Rivers; chinook salmon, O. tshawytscha, in the Nushagak, Togiak, Alagnak, Naknek, and Egegik Rivers; chum salmon, O. keta, in the Nushagak River; coho salmon, O. kisutch, in the Togiak, Nushagak, and Kulukak Rivers; and pink salmon, O. gorbuscha, in the Nushagak River.
Download or read book Creel and Escapement Estimates for Chinook Salmon on the Gulkana River 1996 written by Todd R. LaFlamme and published by . This book was released on 1997 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gulkana River Chinook Salmon Escapement Estimation 2022 2026 written by Tracy R. Hansen and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives of this study are to estimate the spawning escapement and run timing of Chinook salmon Oncorhynchus tshawytscha in an index area of the Gulkana River using counting tower methodology. In addition, sockeye salmon O. nerka escapement at the tower site will be estimated during the period of tower operation. The number of Chinook salmon and sockeye salmon passing the tower site will be estimated by visually counting fish as they pass 2 counting towers located approximately 2.5 km upstream of the confluence of the West Fork. Ten-minute visual counts will be conducted for each river channel every hour, 24 hours per day, 7 days per week. The abundance estimates will be stratified by day. Because counts are planned for all hours, daily estimates of abundance will be a single-stage direct expansion from the 10 min counting periods. The count schedule will start prior to the beginning of the Chinook salmon run, approximately 3 June, and continue until after 10 August when the run is complete. Tower operations may be extended to a later date to enumerate more of the sockeye salmon run if funding is provided by Prince William Sound Aquaculture Corporation.
Download or read book Age Composition and Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 2006 2007 written by Donn Tracy and published by . This book was released on 2012 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Situk River Chinook and Sockeye Salmon Sport Harvest Estimates and Yakutat Marine Sport Harvest Sampling 1998 and 1999 written by Robert E. Johnson and published by . This book was released on 2001 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Mark recapture Experiment to Estimate the Escapement of Chinook Salmon in the Blossom and Keta Rivers 1998 written by Kevin Brownlee and published by . This book was released on 1999 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Upper Cook Inlet Sockeye Salmon Escapement Studies 2014 written by William J. Glick and published by . This book was released on 2016 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2014, the Alaska Department of Fish and Game used dual-frequency identification sonar to estimate an escapement of 1,520,340 (95% CI: 1,494,105-1,546,575) sockeye salmon (Oncorhynchus nerka) into the Kenai River, 440,192 (95% CI: 438,380-442,003) into the Kasilof River, and 55,759-137,256 into the Yentna River. Escapement estimates for the Kenai River were adjusted postseason relating to an overlap of sockeye and pink salmon. An escapement range for the Yentna River was estimated postseason for sockeye, pink (O. gorbuscha), chum (O. keta), and coho (O. kisutch) salmon from 6 sets of fish wheel selectivity indices obtained from the literature. The predominant age classes for sockeye salmon in the Kenai River were 1.2 (12.3%), 1.3 (63.5%), 2.2 (7.2%), and 2.3 (15.3%); Kasilof River 1.2 (42.4%), 1.3 (29.4%), and 2.2 (20.6%); Yentna River 1.2 (39.4%), 1.3 (33.3%), 2.2 (12.4%) and 2.3 (10.2%). Length and sex ratio information were also collected for sockeye salmon at each river. Results of escapement projects conducted by other agencies and organizations are also briefly mentioned in this report.
Download or read book Age Composition and Spawning Escapement of Chinook Salmon in the Karluk Ayakulik and Chignik Rivers Alaska 1995 and 1996 written by Tim Motis and published by . This book was released on 1997 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundance of the Chinook Salmon Escapement on the Stikine River 1998 written by Keith A. Pahlke and published by . This book was released on 2000 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chinook Salmon Escapement and Run Timing in the Gulkana River 2016 2018 written by Corey J. Schwanke and published by . This book was released on 2019 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Counting tower techniques were used to estimate Chinook salmon Oncorhynchus tshawytscha escapement in the Gulkana River during 2016, 2017, and 2018. The counting tower was located in the mainstem Gulkana River about 3.25 rkm upstream of the West Fork Gulkana River confluence. The estimated escapement of Chinook salmon was 1,122 (SE = 166; 95% CI = 796-1,447) in 2016, 3,336 (SE = 309; 95% CI = 2,730-3,942) in 2017, and 5,174 (SE = 344; 95% CI = 4,499-5,848) in 2018. These numbers do not represent total inriver escapement, just passage above the counting tower site. The 2016 estimated escapement of Chinook salmon was the lowest since the inception of the project in 2002, whereas the 2018 estimated escapement was the 2nd highest on record and had the latest run timing. The dates of 25th, 50th, and 75th percentile passage of Chinook salmon have been getting later since the project's inception in 2002. The estimated escapement of sockeye salmon O. nerka during the counting tower's operational period was 26,010 (SE = 1,157; 95% CI = 23,743-28,277) in 2016, 20,492 (SE = 927; 95% CI = 18,675-22,309) in 2017, and 12,436 (SE = 540; 95% CI = 11,377-13,494) in 2018. The partial sockeye salmon escapement estimate in 2018 was the 2nd lowest since the inception of this project in 2002.
Download or read book Estimated Abundance of Chinook Salmon Returning to the Nass River BC 1997 written by Michael R. Link and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1994, a mark-recapture experiment has been used to estimate the annual system-wide chinook salmon escapement to the Nass River, British Columbia. This report describes and presents results from the 1997 experiment, which was designed to test some basic assumptions that heretofore had not been rigorously examined. The objectives of the study were to: determine if the fishwheels used to capture the salmon were size- and/or stock-selective, and if so, examine the implications of ignoring fishwheel selectivity when estimating escapement; estimate the abundance of chinook spawning in the Nass watershed in 1997; and recommend a cost-efficient, long-term study design to accurately estimate the annual, system-wide escapement of chinook to the Nass River. Results are presented and discussed with regard to catches, catch per unit effort, tagging, tag recovery and loss, spawning ground surveys, size selectivity, recoveries among tributaries of the Nass River, and factors affecting escapement estimates. Recommendations are made for the 1998 study.
Download or read book Estimating the 1998 Fraser River Sockeye Salmon Oncorhynchus Nerka Escapement with Special Reference to the Effect of Migration Stress on Estimation Accuracy written by N. D. Schubert and published by . This book was released on 2007 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chinook Salmon Escapement in the Chena and Salcha Rivers and Coho Salmon Escapement in the Delta Clearwater River 2016 written by Lisa Ann Stuby and published by . This book was released on 2018 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
