Originally posted by fishNphysician:
"These results confirm that hatchery fish are maladapted for reproductive survival in the natural environment. This confirmation is robust and applies to hatchery fish regardless of hatchery broodstock origin and various attempts to mimic the genetic and reproductive characteristics of wild fish. Further, it appears supplementation of depressed wild populations with hatchery spawners is an ineffective conservation strategy." [/QB]
Some of the sources of potential error that need scrutiny include: reliability of detecting wire in returning adult fish with present technique (wanding of un-anesthetized fish), errors in estimating smolt migrants because of temporal variations in spill at NF dam and the associated reduction in gear efficiency, and wild adult recruitment from smolt production in areas other than above NF dam. I am sure there are other estimating problem areas; hopefully with the help of others we can complete and critique a full list of them.
Wrong time over the dam and alot of the smolts die. And there are fish that spawn in the lower clackamas.. below all of the damns.
Secondly that statement i quoted above of yours has nothing to do with the True Broodstock programs that they are trying right now on other rivers. He is refering to the standard "hatchery brat". If you have ever caught a True broodstock fish then you could instantly see the difference. its a whole different creature.
Previous Topic
Index
