Here's a bit for you who might be interested and it illustrates a common and costly phenomena. Van indicated above, "However, they are a ravenous invasive species. They have deeply impacted the bird colonies, causing a massive population decline in birds, at the Malheur wildlife refuge. Considering their invasive nature i cant/wont support them as a game species."
Whoops that sure appears to be "confusing the cause with the effect," or that "costly phenomena," I mentioned just above. It's not Van's fault though as that's straight out of the US F&W Services rants and solutions manual for Malheur Lake.
Here's the rest of the story: That Lake is a Shallow marshy lake that drys almost completley up during some dryer years ( a very water poor area for starts with averge rainfall under 6 inches many years) and it has a long history of watershed misuse from many sources.
It gathers water from a Basin that has been overallocated as far as water goes for over 100 years. So badly in fact it's used as a teaching aid with before and after pictures for historical grazing abuses. (think massive piles of cattle and sheep doodoo)
In short every drop of water that flows is being put to Ag in one way or another or for other use. The land has been under attack just as heavily also. At any rate, the fertilizer, aka poop infused water, runoff from these uses is what flows into shallow, marsh Malheur Lake before slowly soaking through the sand dunes into Harney Lake.
(There used to be a clear channel there but it's pretty much filled in over the years.) Following decades of severe overgrazing by first massive flocks of sheep (hundreds of thousands) and then cattle which peaked in the 1970s the lakes which have no outlet didn't have a chance as lakes go, so the US Govt turned Malheur into a Bird Refuge and built a rookery island, etc to attract birds by the millions.
Birds eat and inturn provide superb fertilizer (chicken poop is second only to rabbit poop for a garden as long as you don't over do it.) To make a long story shorter, the Lake was soon a lovely shade of greenish brown and a cess pool and some where along the way Carp were introduced. The eutrophication soon decimated all other fish populations, killed out the original plant life and soon even the birds began to suffer. No problem as the US Govt in their infinite brillance, recognized the problem with the lake and it was those pesky "Carp!!!"
Yes grazing was somewhat back to acceptable levels by then, but little has been done concerning the other problems and uses.
Of course with too many (introduced and invasive) birds, in part, moved there to alleviate the predation on young salmonids down on the Columbia/Snake systems, (more government help!
) there's little hope for the refuge if their solution is just to remove the Carp!
Now you can believe what you'd like, of course, but it sure seems to me the Carp isn't the problem although I will admit they need a bit more population control there than Mother Nature hindered by Man can provide but to blame the Carp well that's sad!
p.s. Before those Carp were the problem it was the pesky Coyotes
that decimated the nesting birds! Not!
but that's another Government Tom Foolery Story!