natural spawners

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dimebrite
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2012/03/18 18:29:29 (permalink)

natural spawners

Its quite impressive to know that a high percentage of fish being caught are dropbacks while the hatchery is still loaded and even some reports of fresh fish as well. It makes one wonder how many thousands of trout have spawned naturally since the late fall spawn up to present time. Makes one also wonder the likelihood of and percentage of wild returns to come from all of the eggs that were dropped in the river. Im interested to hear the dec's final analysis on the return rate of wild rainbow/steelhead.

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    Clint S
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    RE: natural spawners 2012/03/18 19:45:45 (permalink)
    I had thought I had read that the average was in the 40% range or so that was natural spawners. I cant find the article though.

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    dimebrite
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    RE: natural spawners 2012/03/18 20:05:38 (permalink)
    Clint I believe that figure was for the coho. To my knowledge they haven't made a conclusion regarding wild rainbows. But then again im just a dumb plumber behind a smart phone
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    pafisher
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    RE: natural spawners 2012/03/18 20:18:01 (permalink)
    We had this discussion months ago.To sum it up:the steel/rainbow is next to zero,the Salmon have a good return on spawners.Why is that?The trout fry stay in the rivers for a year and can't survive the warm temps,the salmon leave the river in the spring of the first year so they live out in the lake.If the hatchery would not stock the smolts in the spring there would be no steel to speak of.
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    Clint S
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    RE: natural spawners 2012/03/18 21:04:58 (permalink)
    Dime, I think your right on that being the Coho #

    The gods do not deduct from man's allotted span the hours spent in fishing.  ~Babylonian Proverb

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    Lucky13
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    RE: natural spawners 2012/03/19 07:08:50 (permalink)
    Mike Connerton, the biologist in charge of the fin clip trailer for DEC, reported at the State of the Lake meeting that they have enough data on Kings to report 30+% of the returning fish in the SR are wild. The next fish they will evaluate is cohos, maybe steelhead after that.

    L13
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    dimebrite
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    RE: natural spawners 2012/03/19 09:07:47 (permalink)
    Thanks for the input lucky. I thought the coho study was completed but I always knew the steelhead study was not yet.

    My reasons for reiterating topic were soley based on the abundance of fish that spawned in the winter. It would make one wonder if the survival rate is any higher since the eggs have been kept in such cold water for a longer time .
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    Lucky13
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    RE: natural spawners 2012/03/19 19:38:22 (permalink)
    DB-

    Are you referring to the cohos that were reported, here, to be late spawning? Cohos spawn later than kings in their native natural ecosystems. Also spawning season modification is confirmed in some GL tribs in scientific studies, for Rainbows, so you've probably been observing modification, and I've seen it too, but not huge numbers of fish, in SR bows that are out of the normal spawning season range, if it was early spawning 'bows. Mid winter is late for cohos, early for Bows in their native systems, but most of these fish are supposed to be adjacent and connected to the Pacific Ocean, so they are adapting to a foreign ecology even after this many years, and a lot of changes occur under those conditions. And reproduction time also gets distributedg along a normal curve,so if something catastrophic happens early or late, or inthe middle, the species is not obliterated.

    L13
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    dimebrite
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    RE: natural spawners 2012/03/19 19:47:41 (permalink)
    Lucky, I was referring to the early spawning steelhead not the cohoes.... although those late spawning cohoes are something else. Saw a pair in the first week of march last year and many in mid february last year.
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