black lab
Well-known member
Something I came across you guy's might find interesting. http://www.livinglandscapes.bc.ca/thomp-ok/kokanee-salmon/view-life.html 101chromefish101
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dragonfly
Well-known member
interesting infomation indeed 101goodpost101
MTmountainman
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- Jan 16, 2012
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- 71
Thanks for sharing. I've observed beach spawners (in late October and november) and now I'm wondering if there are earlier stream spawners too.
Smalma
Well-known member
To expand a bit on the information in the article.
The tributary spawners can further be divided into those populations that use the inlet streams and those that use outlets. There seems to be a strong genetic component to that division as well with outlet spawners producing fry that swim upstream when they hatch rather than downstream. Tend to find outlet spawners in those basins that have outlet streams of low gradient and low flows in the spring when the fry emerge from the gravel. The fry need low velocities to be able to swim upstream to the lake.
In regards tot he spawn timing that varies some depending on the location. That timing is determined by the water temperatures during the incubation of the eggs and the timing of zooplankton blooms in the spring. The two factors work to together selecting for a spawn timing such that fry hit the lake when there is food.
Many of the wests kokanee populations have their source from WAshington's Whatcom stock. This is native stock has been collected in a hatchery for more than a century with the resulting eggs shipped not only state wide but to many other States and even a few countries. Historically the population began spawning in late October or early November and continued into January. While that late component of that hatchery stock has been lost those lakes that were stocked from Whatcom stocks many decades ago still exhibit a late component to spawn timing.
Tight lines
Curt
The tributary spawners can further be divided into those populations that use the inlet streams and those that use outlets. There seems to be a strong genetic component to that division as well with outlet spawners producing fry that swim upstream when they hatch rather than downstream. Tend to find outlet spawners in those basins that have outlet streams of low gradient and low flows in the spring when the fry emerge from the gravel. The fry need low velocities to be able to swim upstream to the lake.
In regards tot he spawn timing that varies some depending on the location. That timing is determined by the water temperatures during the incubation of the eggs and the timing of zooplankton blooms in the spring. The two factors work to together selecting for a spawn timing such that fry hit the lake when there is food.
Many of the wests kokanee populations have their source from WAshington's Whatcom stock. This is native stock has been collected in a hatchery for more than a century with the resulting eggs shipped not only state wide but to many other States and even a few countries. Historically the population began spawning in late October or early November and continued into January. While that late component of that hatchery stock has been lost those lakes that were stocked from Whatcom stocks many decades ago still exhibit a late component to spawn timing.
Tight lines
Curt
