Fisheries, Subsistence, and Habitat
Publications Searchable Database
Search Again| Division: | Sport Fish |
| Title: | Estimates of chinook salmon abundance in the Kenai River using split-beam sonar, 2000. |
| Author: | Miller, J. D., and D. Burwen. |
| Year: | 2002 |
| Report ID: | Alaska Department of Fish and Game, Fishery Data Series No. 02-09, Anchorage. |
| Abstract: | The passage of chinook salmon Oncorhynchus tshawytscha in the Kenai River in 2000 was estimated using side-looking split-beam sonar technology. Early (16 May-30 June) and late (1 July-10 August) runs of Kenai River chinook salmon have been monitored acoustically since 1987. A 200 kHz split-beam sonar system has been used since 1995 to estimate numbers of migrating adult chinook salmon returning to their natal stream. From 1987 to 1994, a 420 kHz dual-beam sonar was used to generate similar estimates. In 2000, total upstream chinook salmon passage from 16 May through 10 August was an estimated 56,996 (SE = 709) fish, 12,479 (SE = 234) during the early run and 44,517 (SE = 669) during the late run. The daily peak of the early run occurred on 19 June with 50% of the run having passed by that date. The daily peak of the late run occurred on 15 July, with 50% of the late run having passed by 17 July. |
| Keywords: | split-beam sonar, dual-beam sonar, chinook salmon, Oncorhynchus tshawytscha, acoustic assessment, Kenai River, riverine sonar, early run, late run. |