Originally Posted by CTD
Quote
The occurrence of hereditary disorders in conservation breeding programs may severely hamper the overall aim of such programs. The obstacles that arise in this context and the particular management strategies needed to deal with the problems are yet to be adequately addressed. Results from a literature review indicate that hereditary disorders may be fairly common in zoo populations. An example with albinism in a captive brown bear population bred in Nordic zoos is presented. It is demonstrated that the segregation pattern is consistent with an autosomal recessive allele, and carrier probabilities of live animals indicate that the allele occurs in high frequency in the present population. Removing animals with a probability of carrying the allele will result in loss of founder alleles considered particularly valuable. Zoo Biol 18:81-99, 1999. © 1999 Wiley-Liss, Inc.
(emphasis added)
Source.

Of course a little thought, and nobody'd believe mutations only accumulate at an alarming rate among humans. The selection goddess can't select critters automatically, you see. That's my whole point. Without automatic 'selection' eliminating them, mutations must accumulate, and all observations support (and will continue to support) this inescapable conclusion.

Those are zoo populations that have been bred amongst each other for long spans of time. The limited variety of the gene pool in that population coupled with the tendency of zoos to keep even the less adapted animals alive, unlike nature, will result in an increase in undesireable traits.
You've essencially agreed with the theory that animals with those traits will be eliminated more by natural selection than animals without those traits.
Humans have had an increase in inherited sickness since medical science has been able to treat those diseases and the people who would have died young can now live to have children. Hemophilia, and childhood diabeties have increased.

A faith that connot survive collision with the truth is not worth many regrets. -- Arthur C. Clarke