Piltdownpaul
Fish Herder
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- Sep 29, 2006
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Does anybody know anything about endlers and keeping them?
But if two different species of animal breed the offspring is infertile, so that unlikely. Lets hope so anyway.
If only this was true... You are correct, most species cannot interbreed and produce fertile offspring, so this holds 99% of the time. But where species are very closely related, perhaps separated from a common ancestor in the very recent past, then they can and do interbreed, and in doing so produce fertile offspring. Platies and swordtails will interbreed, for example.
As a broad rule, species in different genera (e.g. Poecilia and Xiphophorus) will not interbreed, but species in the same genus (e.g. Poecilia sphenops and Poecilia velifera) may interbreed. For this reason, a lot of cichlid and livebearer enthusiasts tend to keep only different genera in the one tank.
Cheers,
Neale
Wouldn't fertile offspring argue that instead of being separate species that instead the two species are in fact the same species or at least subspecies? I haven't researched this very much but I have read some arguments saying that many supposed species of fish, such as mollies, platies and swordtails, which have several species that can all interbreed successfully are in fact really the same species or closely related subspecies and not actually separate species.