Posted by: Beezer
Imprinting Hatchery Steelhead - 12/24/02 02:53 PM
I have often heard coho imprint so well that returning hatchery spawners will try to swim up a garden hose if it has water flowing out of it from the rearing pond where that fish was raised. I have also heard that hatchery chinook are not nearly so particular to where they return to spawn within a given river system. What about the Chambers Creek stock brats?
Bill McMillan recently spoke at a WSC Meeting and indicated that mature hatchery males will hang around for months after the hatchery females have spawned and exited/died. I am sure this could be the case but Bill implied (at least to me) that these hatchery males were omni-present throughout the system possibly even the smaller feeder streams. Is this really the case? Or are these males hanging out where they were imprinted as juveniles? Is a mature hatchery male imprinted to Reiter a threat to a wild female that is imprinted to an area around Start-up, four miles downstream?
Maybe if we are so concerned about hatchery/wild fish interaction we should take a good look at imprinting and also at out planting of smolt. Where does a hatchery fish return to as an adult if it is reared/imprinted to the smolt stage at Reiter but then planted as a smolt in the Sultan River? Hummm.
If Chambers Creek hatchery stock return as adults to a close proximity to where they were imprinted as juveniles then there should be relatively little mixing with wild fish assuming of course that there is some regulation as to where they are originally imprinted/released.
Why couldn't you imprint all the fish to return to Reiter then set-up an adult trap down river, say around Hansen's or Nordstrom's to pick up your returning adult hatchery broodstock thus eliminating the possibility of all the "biters" being harvested upstream, and let the rest go to be harvested or captured at the rack at Reiter? Hell the Tribes could even take their share from the downstream trap thus eliminating their impact on the wild fish.
I know, sounds waaaay too easy.
Bill McMillan recently spoke at a WSC Meeting and indicated that mature hatchery males will hang around for months after the hatchery females have spawned and exited/died. I am sure this could be the case but Bill implied (at least to me) that these hatchery males were omni-present throughout the system possibly even the smaller feeder streams. Is this really the case? Or are these males hanging out where they were imprinted as juveniles? Is a mature hatchery male imprinted to Reiter a threat to a wild female that is imprinted to an area around Start-up, four miles downstream?
Maybe if we are so concerned about hatchery/wild fish interaction we should take a good look at imprinting and also at out planting of smolt. Where does a hatchery fish return to as an adult if it is reared/imprinted to the smolt stage at Reiter but then planted as a smolt in the Sultan River? Hummm.
If Chambers Creek hatchery stock return as adults to a close proximity to where they were imprinted as juveniles then there should be relatively little mixing with wild fish assuming of course that there is some regulation as to where they are originally imprinted/released.
Why couldn't you imprint all the fish to return to Reiter then set-up an adult trap down river, say around Hansen's or Nordstrom's to pick up your returning adult hatchery broodstock thus eliminating the possibility of all the "biters" being harvested upstream, and let the rest go to be harvested or captured at the rack at Reiter? Hell the Tribes could even take their share from the downstream trap thus eliminating their impact on the wild fish.
I know, sounds waaaay too easy.