Re: [RML] hybrids

Bruce Hansen (bhansen at ozemail.com.au)
Fri, 7 Feb 1997 11:08:51 +1100

I guess all this talk about invasions has got everyone wondering about
fish smuggling in those good old days - little men in spaceships flying in
bags of eachamensis and repeatedly dumping then up there to fight the nasty
splendidas to be able to rape and pillage their streams and females ;-)

We are talking over geological time here - what sort of time span Peter?
2-500,000 years?

The sympatry/allopatry thing is interesting. Remember when we went to the
Walker River
Barry? We were surprised at the lack of variety compared to the
surrounding regions - only one species of Rainbowfish, one species of
Hardyhead, two species of Ambassis, very few gudgeons and no Blue-eyes. Why
should there be this island of "monotony" in a region of diversity?

Another example that comes to mind from Darwin is the co-existence of
Pseudomugil cyanodorsalis and inconspicuus. but they are estuarine and
perhaps the habitat preference thing is harder to define?

Bruce Hansen
ANGFA

email: bhansen at ozemail.com.au
Don't miss the ANGFA web pages at -
http://www.ozemail.com.au/~fisher/angfa.htm

----------
From: peter.unmack at ASU.Edu

<<Good stuff. We need some interlectual discussion on this list
occasionally>>,