Rainbow trout (Oncorhynchus mykiss) were captured in the Iliamna drainage from 1986 to 1991. Abundance estimates of spawning trout found in the Kvichak River (at outlet of Lake Iliamna near village of Igiugig, southwestern Alaska) were derived using the Jolly-Seber estimator. Estimates of survival and age were also determined.
The Behavior and Ecology of Pacific Salmon and Trout combines in-depth scientific information with outstanding photographs and original artwork to fully describe the fish species critical to the Pacific Rim. This completely revised and updated edition covers all aspects of the life cycle of these remarkable fish in the Pacific: homing migration from the open ocean through coastal waters and up rivers to their breeding grounds; courtship and reproduction; the lives of juvenile salmon and trout in rivers and lakes; migration to the sea; the structure of fish populations; and the importance of fish carcasses to the ecosystem. The book also includes information on salmon and trout transplanted outside their ranges. Fisheries expert Thomas P. Quinn writes with clarity and enthusiasm to interest a wide range of readers, including biologists, anglers, and naturalists. He provides the most current science available as well as perspectives on the past, present, and future of Pacific salmon and trout. In this edition: Over 100 beautiful color photographs of salmon and trout Updated information on all aspects of the salmon and trout life cycle Expanded coverage of trout
Report of a study to estimate abundance of rainbow trout (Oncorhynchus mykiss) in the Agulowak and Agulukpak Rivers near Bristol Bay in southwestern Alaska during 1992, and also to estimate age, length and weight compositions.
A multiple-event mark–recapture study was conducted on rainbow trout (Oncorhynchus mykiss) in the upper Kenai River in 2018. 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, 2001, and 2009 on the same stretch of river. There were an estimated 10,568 (SE 608) rainbow trout at least 200 mm FL and 8,482 (SE 495) rainbow trout at least 300 mm FL in the study area. Abundance of fish at least 200 mm FL was 79% higher than in 2009 and 24% higher than in 2001. Abundance of fish at least 300 mm FL was 66% higher than in 2009, 33% higher than in 2001, and 52% higher than in 1995. Most of the rainbow trout were between 250 mm and 449 mm FL, accounting for 88% of the population. Approximately 75% of the population was less than 400 mm FL, which is the approximate upper length (16 inches total length) of fish allowed to be harvested by regulation. Overall, rainbow trout abundance in 2018 was considerably higher than in any other study year, but the number of fish more than 450 mm FL was only 743 (SE 71), which was less than half of what was observed in 1995, 2001, and 2009.
"Provides a benchmark of Arolik River rainbow trout population parameters for comparison between years and possibly to other western Alaska rainbow trout"--Page ii.
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 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.
