So, the hobby's concern is maintaining the blood lines and appearance of the fish as close to what it would be in the wild. Is that a correct assumption?
It depends. On one end of the spectrum you've got some that enjoy the hobby and their concern would be pretty fish in a glass box that needs the water topped off as it evaporates. On the other end you've got people who are very serious about the care and preservation of species. If you took either the average or the median, I think you'd fall in like with your assumption and the more people know, the more they start to care about the finer points or the larger picture.
As Dan eluded to, there are cichlid species going extinct in Africa. Most are probably most familiar with the Nile Perch and the problems it created in Lake Victoria after being introduced as a food source. That's not the only problem. In many lakes, including Lake Malawi and Lake Tanganyika there are problems that stem from a variety of reasons ranging from development to overfishing (both to eat and for our hobby).
One great awareness effort has come in the form of the C.A.R.E.S. (Conservation, Awareness, Recognition, Encouragement, and Support) Preservation Program.
http://www.carespreservation.com/Through the efforts of many, they've been trying to keep a tab on the status of wild cichlid populations and maintain a list of those that are anywhere between "vulnerable" to extinction all the way up to and including "extinct in the wild". Here's the list:
http://www.carespreservation.com/priority_list.htmlDepending on how long you've been involved in the hobby, some of those might seem odd to appear on the list, as they are or at least were, common place in the hobby in recent years. Here's what I recognize at a glance from the list that I've seen come through our MCA auctions in the last ~5 years or so....
Astatotilapia latifasciata
Astatotilapia sp. 'thick skin'
Aulonocara kandeense
Aulonocara maylandi
Aulonocara sp. 'lwanda'
Cyrtocara moorii
Copadichromis mloto
Copadichromis sp. 'firecrest mloto'
Haplochromis sp. ‘kenya gold’
Harpagochromis sp. ‘golden duck’
Melanochromis chipokae
Paratilapia polleni
Placidochromis phenochilus
Protomelas sp. 'mbenji thick-lip'
Protomelas sp. 'steveni taiwan'
Pseudotropheus demasoni
Pseudotropheus saulosi
I'm sure I missed, some, but man that is a lot of different species that we can find in captivity, but are on the downfall in the wild.
When species are threatened to go extinct or have gone extinct in the wild, preserving the species through captive breeding programs is often the only way to attempt repopulation. So what happens if we've muddied the gene pool through poor breeding practices or acceptance of creating hybridizing species?