[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [APD] Cardinals, finned or feathered
>> I thought maybe they evolved schooling behaviour as predator defence
because they are so vivid :) ?
The schooling behaviour is most probably an instinctive survival tool, which
goes in hand with the colouring, rather than because of it. The colouration
is likely to be partly for the ability to find each other in dark water
(look at the Ender's (sp?) guppy, which has bright metallic colouration
becasue it lives in green water), but also to confuse predators when in
groups. This could serve the function of breaking up their individual
profiles, thus preventing the predator from focusing on one fish. This is
akin to that of another strikingly coloured and patterend animal, the zebra,
which in herds is very difficult to visually isolate individuals.
E-mail just got a whole lot better. New ninemsn Premium. Click here
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com