i am no real fresh water fisherman, caught a few bass and trout nothing to write home about, but i am a qualified conservationist. i have said before in other posts i consider myself an indiginut,that is pro indigenous. yes we have a problem with aliens and yes it will take a long time to eradicate. remember with some species it can take a very long time before we start feeling the effects of their precenseand by then it could be to late. as to alternative fish specimens to these aliens maybe there are none due to the fact that these fish may have removed them from the ecosystem.
some would argue that it is the natural way of things that the new species must adapt to survive or die. unfortunatly things that control that species like predation ( general and specialist), habitat needs and even disease resistance are lacking. a good example are the himilayian tar on table mountain. nothing can prey on them due to their habitat specs, one of the thoughts with these animals is that they have lead to the decrease in indigenous mountain species. i dont know i would rather be able to see a species in its own country of origin than to see it in my own country and lose out on getting to know indigenous species.
i have no problem if one sets up a dam with the intent to have only carp, bass or trout and being shut off from all open natural water sources, thus preventing contamination. i have seen this with a few trout dams in the burg so why not follow the same principles. i see this as along the lines of having agricultural land set up for use exclusively to cattle, by doing this the guys can still catch what they want and our ecosystem will not feel the impact. as well as economically people will not lose jobs in fact there may be an element of job creation. just an idea.
my question is with regards to these species reproduction and please excuse the ignorance as no body knows everything. the question is, what level of predation besides humans do carp expeirence in the wild. i ask cause i question the fact that these fish get so big may be because their is nothing to eat them once they get over a certain size. also what would the infant mortality rate be, is there a level of balance. this could mean that large fish are getting larger and they take up recourses that other fish event hose of the same species could use.
i appreciate everyones input and for me the only way to learn is to listen to others views. whether i wet my lines regularly or not i see it as growing as a person and enables me to make better judgements on issues. and if you cant laugh at something why bother being involved at all. i am by no means saying that their is not a level of seriousness but i believe that one can make a bigger change if you present a situation in a different light to this is how things are gonna be attitudes. as my motto in life says without education there can be no conservation.