Yes. While I don't know if it has any relevance to their breeding
behavior, the most obvious difference between the two is the position
of the mouth. P erythrogaster's mouth is slightly subterminal, with
the snout overhanging it _slightly_. P eos' mouth is terminal and
may slant slightly upward. There are surely variations on this from
population to population, but this is generally true in my
experience. The differences in breeding mode could be related to
differences in habitat. P erythrogaster usually lives in small
headwater streams with steady flow. These tend to be sparse on
vegetation and heavy on gravel areas. Versus P eos which tends to
live in clear lakes and quiet areas where submerged vegetation is
common and bare gravel is harder to find, or maybe would leave the
adults and fry more vulnerable to predation by larger fishes than in
shallow headwaters where large predators are limited. Yeah, I think
I've convinced myself of that :)
-- Mark Ohio USA <))>< /----------------------------------------------------------------------------- /"Unless stated otherwise, comments made on this list do not necessarily / reflect the beliefs or goals of the North American Native Fishes / Association" / This is the discussion list of the North American Native Fishes Association / nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word / subscribe, unsubscribe, or help in the body (not subject) of an email to / nanfa-request_at_aquaria.net. For a digest version, send the command to / nanfa-digest-request_at_aquaria.net instead. / For more information about NANFA, visit our web page, http://www.nanfa.org </x-flowed>