RE: [Killietalk] arnoldi story

[Chris <cgraseck at optonline_net>]

Wright,

How does one differentiate between two closely related species.  I don't
believe that there is any magic number of restriction fragment length
polymorphisms (RFLPs) that determines species.  If there were it would
take all the fun out of taxonomy.  Different species have different
numbers of   RFLPs between them depending on how broad the gene pool of
that species is.
Some species, like ours (H. sapiens sapiens), have a very small gene
pool and all members are very closely related. Where as other species
have much broader gene pools and individuals are not as genetically
similar.

I know you are a dog person so lets use this for instance, according to
Coppinger, et al, it is not possible to differentiate between Dog, wolf,
Coyote, and Jackal DNA.  The line between species is too vague.  They
share too many genes and the distribution of genes is somewhat random
among the whole group.

I'm far from an expert on this so please correct me if I'm mistaken.
Actually I'm not disagreeing with your hypothesis I just don't think we
are at the point where we can say this male is not the same species as
this female when those species are very closely related.

Cheers,

Chris  

-----Original Message-----
From: killietalk-bounces at aka_org [mailto:killietalk-bounces at aka_org] On
Behalf Of Wright Huntley
Sent: Monday, January 05, 2004 12:45 AM
To: killifish discussion list
Subject: Re: [Killietalk] arnoldi story

The *Paludopanchax* sub genus seems to have always had some kind or 
other of breeding problems.

My current hypothesis is that maybe we are not always starting with 
males and females all of the same species. A little DNA detective work 
seems to be called for. Good student project?

Wright


RuevenM at aol_com wrote:

> Hi Ed,
> 
>      Wow that's a good one -- sorry for the stress. At least the
batesii were 
> easy and they are suppose to be the tough ones! There is something
very very 
> odd with arnoldi eggs and it seems to have always been this way. I
guess that 
> is one reason they never stay in the hobby. I guess we have to think
of them 
> like N. furzeri with incubation times all over the map. Maybe like
zonatus and 
> hoignei they need warmth -- 80F in peat storage. Being in Texas maybe
mine 
> were stored warmer although I did not use an incubator like with
zonatus and 
> hoignei. There just seems to be alot of reports on arnoldi eggs so
maybe we should 
> start raising a warning flag?
> 
> Bobby
> To join the AKA see http://www.aka.org/pages/join.html
> Archives are at http://fins.actwin.com/killietalk/
> 

-- 
Wright Huntley -- 760 872-3995 -- Rt. 001 Box K36, Bishop CA 93514

     "...there are only a limited number of things that government
  can do more effectively than individuals or other organizations
  can do."
      -- T. Sowell


To join the AKA see http://www.aka.org/pages/join.html
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Archives are at http://fins.actwin.com/killietalk/