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It may be that the golden gardneri is a highly inbred strain that manifests
some of the likely problems common with excessive inbreeding. Infertility is
one of the signs that this may be the case. The same situation exists with the
golden lineatus which have its origin from one wild male (golden) and a
domestic female. The golden/orange A. australe is another case in point but
the inbreeding did little or no harm as the lethal genes were bred out and
they are essentially clones. Perhaps the golden gardneri will not do as well.
Specimens with any signs of weakness should not be bred and passed on to
others or the weakness will continue to be part of the mix. This is sometimes
a difficult call but it is in the best interests of the hobby. If the
husbandry is right but the fish are not producing strong eggs and fry, then it
should not be passed on unless, of course, it is so rare that it would
disappear without making the effort.