smokin' Kokes
Well-known member
the mysis shrimp may be contributing to the unique long term fluctuations of several complex strains of ocean run now landlocked sockeye, centuries old strains of natural geological events landlocked sockeye transplanted by man, and artificially created by man "kokanee" into Wallowa Lake from indications of ODFW studies. ODFW biologists are concerned that the shrimp directly compete with sockeye for food, zooplankton. There are at least 3 major gene pools at work here and more than likely more unofficial bucket brigade do-gooders dumping in kokanee strains in the middle of the night.
This was an stable river/lake system ecosystem until disturbed and biologically damaged in the last 150 years by tampering.
http://www.coastangler.com/kokanee/odfw.html
The following is quoted from the Oregon Department of Fish and Wildlife Internet site. This site features the weekly recreation report, the latest department news releases and much more.
SPECIFIC STATUS CONDITIONS GRANDE RONDE/WALLOWA LAKE: The sockeye morphology became extinct in the Grande Ronde as the result of a barrier constructed at the outlet of Wallowa Lake in 1916. The barrier eliminated sockeye access to Wallowa Lake. Sockeye continued to be observed in Wallowa River below the lake until the early 1930s, when they become extinct. Two kokanee populations exist in Wallowa Lake, an inlet-spawning population and a shore spawning population. The shore population is a new population discovered in 1993. The two populations are reproductively isolated from all other kokanee. Kokanee population trends and age-class distribution have been monitored annually by creel sampling and inlet population age-class sampling since 1970. The populations fluctuate over time, but show no particular long-term trend. Models to estimate population sizes are being evaluated, but the spawning populations are known to include hundreds of fish based on observations on the spawning grounds. Mysis shrimp were introduced into Wallowa Lake in the 1960s. Although the shrimp are eaten in small amounts, they do not appear to be used as a primary kokanee food item and there is concern that they may be affecting the population dynamics of native zooplankton. Zooplankton populations have been monitored annually since 1986. Hatchery kokanee were planted in this population historically. The hatchery program was discontinued for a period, then reinstated in 1990 using Paulina Lake stock to evaluate the feasibility of using hatchery fish for harvest. Evaluation of catch contribution of these hatchery fish has been conducted annually through angler creel surveys. Preliminary results to date indicate hatchery kokanee have contributed less than 3% to angler catches through 1994. All hatchery fish have been marked. The hatchery fish are of mixed origin and less than 5% can naturally spawn with the wild fish. Marked fish were observed spawning in the shoreline population for the first time in 1993. No hatchery fish have been observed in the inlet population, but sampling of the population has been limited. Hatchery releases were discontinued after 1994. Preliminary results from the NMFS biochemical survey suggest that there has been some hatchery introgression in both populations, most probably from the historical hatchery program
This was an stable river/lake system ecosystem until disturbed and biologically damaged in the last 150 years by tampering.
http://www.coastangler.com/kokanee/odfw.html
The following is quoted from the Oregon Department of Fish and Wildlife Internet site. This site features the weekly recreation report, the latest department news releases and much more.
SPECIFIC STATUS CONDITIONS GRANDE RONDE/WALLOWA LAKE: The sockeye morphology became extinct in the Grande Ronde as the result of a barrier constructed at the outlet of Wallowa Lake in 1916. The barrier eliminated sockeye access to Wallowa Lake. Sockeye continued to be observed in Wallowa River below the lake until the early 1930s, when they become extinct. Two kokanee populations exist in Wallowa Lake, an inlet-spawning population and a shore spawning population. The shore population is a new population discovered in 1993. The two populations are reproductively isolated from all other kokanee. Kokanee population trends and age-class distribution have been monitored annually by creel sampling and inlet population age-class sampling since 1970. The populations fluctuate over time, but show no particular long-term trend. Models to estimate population sizes are being evaluated, but the spawning populations are known to include hundreds of fish based on observations on the spawning grounds. Mysis shrimp were introduced into Wallowa Lake in the 1960s. Although the shrimp are eaten in small amounts, they do not appear to be used as a primary kokanee food item and there is concern that they may be affecting the population dynamics of native zooplankton. Zooplankton populations have been monitored annually since 1986. Hatchery kokanee were planted in this population historically. The hatchery program was discontinued for a period, then reinstated in 1990 using Paulina Lake stock to evaluate the feasibility of using hatchery fish for harvest. Evaluation of catch contribution of these hatchery fish has been conducted annually through angler creel surveys. Preliminary results to date indicate hatchery kokanee have contributed less than 3% to angler catches through 1994. All hatchery fish have been marked. The hatchery fish are of mixed origin and less than 5% can naturally spawn with the wild fish. Marked fish were observed spawning in the shoreline population for the first time in 1993. No hatchery fish have been observed in the inlet population, but sampling of the population has been limited. Hatchery releases were discontinued after 1994. Preliminary results from the NMFS biochemical survey suggest that there has been some hatchery introgression in both populations, most probably from the historical hatchery program
