06-17-2007, 09:09 PM
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I breed many species of fish. The bloodline subject isn't a big thing that I worry about. I do, from time to time, move fish (male or the female harem, from tank to tank to help prevent heavy inbreeding. A prime example of the bad effects of heavy inbreeding is the Neon Tetra
. The practice of heavy inbreeding can result in faded colors and other genetic abnormalities.
We cannot be sure when we buy a "colony" of fish to start a breeding setup from our lfs's, that these fish are not related in some way. Most, and I say most, breeders are not worried about gene purity, but species purity, unless they are trying to create a viable hybrid. Examples of this are guppies, mollies, Discus
, and some of the other new "mutts" currently showing up in the trade.