%0 Book Section
%9 OS CH : Chapitres d'ouvrages scientifiques
%A Daget, Jacques
%T Evolution et spéciation dans les milieux autres que les grands lacs = Evolution and speciation in other aquatic ecosystems than great lakes
%B Biologie et écologie des poissons d'eau douce africains = Biology and ecology of african freshwater fishes
%C Paris
%D 1988
%E Lévêque, Christian
%E Bruton, M.N.
%E Ssentongo, G.W.
%L fdi:26390
%G FRE
%I ORSTOM
%@ 2-7099-0929-4
%K POISSON D'EAU DOUCE ; SPECIATION
%K EVOLUTION DES ESPECES
%K AFRIQUE
%N 216
%P 53-63
%U https://www.documentation.ird.fr/hor/fdi:26390
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/pt5/travaux_d/26390.pdf
%W Horizon (IRD)
%X Freshwaters, with the exception of large lakes, are divided into many different biotopes, generally of small size and isolated by geographical or ecological barriers which prevent gene exchanges between populations. Therefore, segregation plays a major role in freshwater fish speciation in Africa. Some groups of species develop unique ways of speciation e.g. chromosomal translocations for cyprinodonts, ethological segregation for cichlids. The importance of these phenomena in evolution and species multiplication has been demonstrated. Nevertheless, there are still large gaps in our knowledge of reproductive isolation processes in African freshwater fishes. Attempts to cross-fertilize and study hybrids will probably give us much more information on the degree of reproductive isolation of species which itself is the very essence of the biological species and of speciation. (Résumé d'auteur)
%S Travaux et Documents de l'ORSTOM
%$ 034BIOVER01