Catch, harvest, and size statistics for the rainbow trout fishery in the Tazimina River, Alaska, during 1987 and 1988
Brookover TE. 1990. Catch, harvest, and size statistics for the rainbow trout fishery in the Tazimina River, Alaska, during 1987 and 1988. Fishery Data Series. 112. Alaska Department of Fish and Game, Division of Sport Fish. Juneau, AK
A 2-year cooperative study between the US National Park Service and the ADFG, Sport Fish Division, was conducted on the Tazimina River from 1 August to 3 October 1987 and from 8 June to 5 October 1988. The study was designed to collect sport angler effort, catch, harvest, and boat use information through direct expansion creel surveys, and to investigate sockeye salmon Oncorhynchus nerka spawning habitats through spawning ground sruveys. It was estimated taht anglers fished 3,720 hours during 1987 resutling in an estimated catch of 969 rainbow trout Oncorhynchus mykiss, 3,155 sockeye salmon, 577 Arctic char Salvenlinus alpinus, and 1,477 Arctic grayling Thymallus arcticus. During 1988, angling effort was estimated to be 7,073 hours and resulted in a catch of 1,818 rainbow trout, 3,679 sockeye salmon, 335, Arctic char, and 5,115 Arctic grayling. Havests of all species were less than 30 percent of the total catch in both years. Raft accounted for 33 percent of the boat traffic during the 1987 study and jet boats accounted for 46 percent. In 1988, raft accounted for 22 percent of the boat use and jet boats accounted for 60 percent. Rainboa trout and Arctic grayling were sampled for age and length using hook and line, seine, and minnow trap gear. Age 5 and 6 rainbow trout were teh dominate age group sampled by hook and line gear, age 4 by the beach seine gear, and age 1 by the minnow trap gear. In addition, 256 of the 716 rainbow trout were tagged with individually numbered Floy anchor tags. Recatures of tagged rainbow trout were reported from Six Mile Lake(2), the Newhalen River(3), and the Tazinina River (28). Age 3,4,and 5 Arctic grayling dominated the sample obtained with all three gear types. One hundred ninety-two redds of sockeye salmon sampled during 1987 had a mean water depth of 0.66 meters (SE = 0.02) and mean water velocity of 0.62 meters per second (se - 0.02). Gravel (0.5 - 1.0 inch diameter) was the substrate found most frequently.
- Type
- Published Report
- Authors
- Brookover, Thomas
- Date of Issue
- 1990
- Publisher
- Alaska Department of Fish and Game, Division of Sport Fish
- Units
- LACL , SWAN
- Keywords
- Animal Studies, Creel Census, Rainbow Trout, Size, Tazimina River AK