Fisheries, Subsistence, and Habitat
Publications Searchable Database
Search Again| Division: | Sport Fish |
| Title: | Stock assessment of rainbow trout in the upper Kenai River, Alaska, 2009 |
| Author: | Eskelin, A., and D. Evans |
| Year: | 2013 |
| Report ID: | Alaska Department of Fish and Game, Fishery Data Series No. 13-16, Anchorage. |
| Abstract: | A multiple event mark–recapture study was conducted on rainbow trout (Oncorhynchus mykiss) in the upper Kenai River in 2009. The objectives of this study were to estimate the abundance and fork length (FL) composition of rainbow trout in the most heavily fished section of the upper Kenai River (river miles 69.6–73.2), and to compare these estimates to those from previous surveys conducted in 1986, 1987, 1995, and 2001 on the same stretch of river. Estimated abundance of rainbow trout at least 200 mm FL in the study area was 5,916 (SE 481) fish. The estimate included 5,106 (SE 354) rainbow trout at least 300 mm FL. The abundance estimate of fish at least 200 mm FL was 30% lower in 2009 than in 2001. The number of fish less than 450 mm FL was 45% less than that observed in 2001. Abundance of fish at least 300 mm FL was significantly larger than estimates from 1986 and 1987, but not significantly different from estimates in 1995 and 2001. |
| Keywords: | rainbow trout, Oncorhynchus mykiss, abundance, MARK, RMark, Huggins models, fork length, Kenai River, mark–recapture |