Re: undescribed apisto species

[Mike & Diane Wise <apistowise@fgn.net>]

Sarah,

This information is from a Ph.D. student doing DNA studies on apistos. Most of
his results must await completion of his Ph.D. dissertation, but he allowed
Koslowski to mention this one result in his new book. If you're interested in
this type of thing you might want to read the following paper:

Farias, I., G. Orti, I. Sampaio, H. Schneider, & A. Meyer. 2001. The cytochrome
b gene as a phylogenetic marker: the limits of resolution for analyzing
relationships among cichlid fishes. J. Molecular Evolution 53: 89-103.

In it, the authors claim that the genus Apistogramma is one of the fastest
evolving genera of cichlids in South America. If geological & ethnological data
from the Amazon Basin are true, many of the Apistogramma species we see today
are less than 2,000 years old! This corresponds well with their DNA findings
for recent, rapid, speciation.

Mike Wise

Samala wrote:

> Mike Wise wrote:
> "Mitochondrial DNA studies now show that A. caetei &
> A. cf. caetei (Guamá) are more distantly related to
> each other than all of the Mbuna genera in Lake
> Malawi. In other words species of Pseudotropheus are
> more closely related to species of Melanochromis,
> Labidochromis, etc. than A. caetei is related to A.
> cf. caetei (Guamá)."
>
> Wow!  Let me say that again, WOW!  The implications of
> that are just, for an evolutionary ecology geek like
> me, they're breathtaking.  Twenty miles apart and
> they're THAT distant genetically?!  Holy holy holy
> cow.  Allopatric speciation processes at its best I
> suppose.
>
> I desperately hope this has been published, if so
> would you be so kind as to give me a journal
> reference?  And if not, I'll definitely keep an eye
> out for this - it is EXACTLY what I'm interested in
> for grad work.
>
> Thanks for the advice/help on the cf/sp. situation!
>
> >Sarah
>
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