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how were they origonally wild fish??? they had to come from somewhere to begin with.....
now if only the biggest fish were used as donors would it not counteract the argument of poor genetics??? I seem to recall something similar done with trout in Taupo some years back...
I would suspect from what I saw on hatchery "open days" when I was a kid, any hand male fish got mixed with any handy female fish! That was about the extent of any genetic "selection"
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