05-02-2012, 08:47 PM
My bad, I thought you worked for DWR. Doggone's point about harvesting rainbows quickly makes my point. They are managed for quantity rather than quality. Large numbers are stocked so that there are large numbers to be harvested. The carrying capacity of the 'land' is a finite quantity, meaning you can only put so much biomass on a given range/water. All the mouths compete for the available food, limiting the amount that each individual can grow by limiting the food supply. Reduce the number of mouths and you increase the size any given individual can attain by increasing the amount of available food. Other factors also play into this, but overall, you can have, say 100lbs of fish flesh per acre of water. That can be in 1 - 100lb fish, 2 - 50lb fish, 100 - 1lb fish, or 200 - 1/2lb fish. It all depends on what you want, quantity or quality !! A good example of this is Utah Lake. They are reducing the carp population, to increase the food supply and reduce the negative effects of carp on the ecosystem, to better allow the June Sucker to survive out there. About 85 % of the biomass of the lake is in carp !! So if you want quality, you will have fewer numbers, if you want quantity, you will have lower quality !!
Again, apologies to PBH for calling him a Biologist !!
Again, apologies to PBH for calling him a Biologist !!