Dear Dr. Campbell:
You wrote: "Most animals in this category are parthenogenetic". Great!
Parthenogenetic animals do not hybridise, as only one individual is
involved,
Parthenogenesis therefore excludes hybridisation, as a male and a female
individual are required.
In plants dandelions [Taraxacum officinale] is notorious for its capability
of self-fertilization, and with a "reductio in absurdum" one could say that
every individual would be a species of its own.
So, I am still looking for examples ..................
Gijs
----- Original Message -----
From: "bivalve" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, March 20, 2004 4:55 PM
Subject: Re: hybrids, Lambis, population
> >a large predator (Nile Bass?)<
>
> The Nile perch, an obvious bad idea to anyone familiar with trophic
patterns (for fishery impact) or with the effects of introduced generalist
predators.
>
> There are self-reproducing hybrid populations; these qualify as new
species. Molluscan examples include almost all freshwater Corbicula, most
if not all sphaerioideans, and most populations of Lasaea; probably some
thiarids also fall under this category. They are quite common in plants and
sporadic but widespread in animals (no mammal or bird examples known,
though). Most animals in this category are parthenogenetic, though
Corbicula has some components of sexual reproduction despite being triploid.
>
> Dr. David Campbell
> Old Seashells
> University of Alabama
> Biodiversity & Systematics
> Dept. Biological Sciences
> Box 870345
> Tuscaloosa, AL 35487-0345 USA
> [log in to unmask]
>
> That is Uncle Joe, taken in the masonic regalia of a Grand Exalted
Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at
Droitgate Spa
>
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