Kodiak Management Area Salmon Escapement And Catch Sampling Results 1999

Author : Michelle L. Wattum
Publisher :
ISBN 13 :
Total Pages : 94 pages
Book Rating : 4.:/5 (114 download)

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Download or read book Kodiak Management Area Salmon Escapement and Catch Sampling Results, 2017 written by Michelle L. Wattum and published by . This book was released on 2018 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over 2.2 million salmon were enumerated through Alaska Department of Fish and Game (ADF&G) salmon counting weirs in the Kodiak Management Area (KMA) during 2017. Of these fish, over 1.4 million were sockeye salmon Oncorhynchus nerka, which are the focus of sampling efforts. Approximately 9,700 adult sockeye salmon were sampled for age, sex, and length (ASL) on major river systems in the KMA; these data were used to represent escapement age compositions. The predominant age classes in the escapement were age-2.2 (45.7%), -2.3 (21.4%), -1.3 (11.4%), and -1.2 (10.1%) fish, but primary age classes varied by system. Commercially-caught sockeye salmon were sampled by ADF&G for age estimation from several areas throughout the KMA. Approximately 6,900 scales were used to represent a combined commercial harvest of approximately 1.7 million sockeye salmon from sampled areas. ASL samples collected from the 2017 commercial catch revealed an age structure composed predominantly of age-2.2 (38.7%), -1.3 (21.5%), and -2.3 (19.5%) sockeye salmon; however, primary age classes varied by section and district. Sockeye salmon brood tables were updated for the Ayakulik, Frazer, Karluk, and Upper Station systems; 10-year average return-per-spawner estimates ranged from 1.3 for the Upper Station early run to 2.9 for the Frazer run. The examination of historical trends in sockeye salmon age compositions shows tremendous variability within and among systems.