by aka anglinarcher » Mon Apr 04, 2011 11:57 am
dahlberg wrote:
> History has proven that almost any time a non indigenous fish is introduced
> into a system, something that belongs in that system suffers. Often with
> irreversible consequences.
> best,
> L
I so agree with Larry on this one. That does not mean I don't enjoy the Bass and Walleye and Perch and even a lot of trout and ........... that I fish for in the Pacific Northwest, because none of them are indigenous to our waters. Still, other species have suffered because of them.
In our case, the species that suffered most are species that we, as fishermen, don't consider sport or food fish, but ....... An exception would be a native West Slope cutthroat trout. It has been out competed and interbred with the Rainbow Trout in most of our waters, so this is one desirable that is suffering from a fish that we consider a desirable non-indigenous species.
Consider the Carp, invasive, destructive, not native to any waters in the US. I have seen very few cases where someone would say that the Carp was good for a body of water.
There are always exceptions to the rules, and the Great Lakes are a prime example of cases where predators were required to re-balance a system, but for every exception to the rule, there is a case to prove why we want to be so careful. A prime example of rule and exception would be Lake Powell on the Colorado River in Utah/Arizona. The lake had some of the best Large Mouth Bass fishing in the world, let alone the greatest scenery in the world. The Bass were not indigenous, but they were put in the lake to fill an un-natural ecosystem created by the Glen Canyon Dam. Bluegill, Crappie, Catfish, all did well. Then, in a poorly thought out event, Fisheries Managers planted Stripped Bass. At first, it looked like a brilliant move. The Strippers soon overpopulated, stunted, took over, cleaned out the Shad, and the lake was devastated. I understand that somewhat of a balance has been established again, but it is not what it was once before.
Only time will tell if the Snakehead problem is as bad as it is suggested it will be. They are a top end predator, being placed in water with no natural enemies, with full knowledge that they will at least compete with existing desirable predators. Worse yet is the strong indication that they will feed on the desirable and indigenous predators we have grown to love.
Species introduction is something that should be done only with a great deal of study and thoughtful consideration, not by bucket biologist, or Johnny Fish Seed's. In the case of the Snakehead, we may very well be watching proof of this.
I think my bucket list has a hole in the bottom!