Fisheries, Subsistence, and Habitat
Publications Searchable Database
Search Again| Division: | Sport Fish |
| Title: | Late-run Kasilof River Chinook salmon sonar assessment, 2019–2020. |
| Author: | Miller, J., S. Maxwell, B. Key, B. Glick, and A. Reimer. |
| Year: | 2022 |
| Report ID: | Alaska Department of Fish and Game, Fishery Data Series No. 22-13, Anchorage. |
| Abstract: | Adaptive resolution imaging sonar (ARIS) was used for the first time in 2018 to estimate the abundance of late-run Chinook salmon (Oncorhynchus tshawytscha) at RM 8 of the Kasilof River. The same methods were used to estimate late-run Chinook salmon abundance in 2019 and 2020. In 2019, the sonar was operated from 15 June through 31 August. In 2020, the sonar was operated from 15 June through 22 August. Net upstream passage of late-run Chinook salmon greater than or equal to 75 cm mid eye to tail fork length (METF) as measured by ARIS was estimated to be 4,507 (SE = 184) in 2019 and 3,388 (SE = 165) in 2020. The 2019 cumulative late-run Chinook salmon abundance estimate of fish greater than or equal to 75 cm METF was higher than the 2018 and 2020 estimates. Run timing in 2019 and 2020 was earlier than in 2018. |
| Keywords: | Chinook salmon, Oncorhynchus tshawytscha, abundance, adaptive resolution imaging sonar, ARIS, Kasilof River |