Coexistence of natural clones and biotypes of hybrid complex of genus Cobitis in selective processes

Some animals are characteristic with sexual and asexual reproduction. Answer to the question if the sexual reproduction is advantageous or rather detrimental is still ambiguous. The so-called asexual complexes offer an interesting possibility to adress this questions, since there are composed of co-existing sexual and asexual biotypes and of a spectre of clonal lineages which usually compete for the same resources. We will focus on diploid-polyploid complex in loaches (Cobitis). We will apply parasitological, genetic-molecular, ecological and behavioural methods.