Elucidating how natural selection promotes local adaptation in interaction with migration,
genetic drift and mutation is a central aim of evolutionary biology. While several conceptual …

Despite the impressive increase in the cloning and expression of genes encoding fish
immunoregulatory molecules, the knowledge on “in vivo” and “in vitro” functional …

According to the theory of mate choice based on heterozygosity, mates should choose each
other in order to increase the heterozygosity of their offspring. In this study, we tested the …

Evidence of selection acting on major histocompatibility complex (MHC) genes has been
illustrated with the analysis of their nucleotide sequences and allele frequency distribution …

Abstract At 1,830 m altitude, Lake Tana is situated on the basaltic Plateau of the north-
western highlands of Ethiopia covering an area of ca 3,050 km2. It is poor in nutrients and …

Balancing selection maintains high levels of polymorphism and heterozygosity in genes of
the MHC (major histocompatibility complex) of vertebrate organisms, and promotes long …

Recently the complex of 'large', hexaploid barbs (genus Barbus) of Lake Tana, Ethiopia, was
revised as 14 species (NAGELKERKE & SIBBING, 1997), seven of which were new. This …

Sequence-based ty** of a breeding population (G1) consisting of 84 Atlantic salmon
individuals revealed the presence of 7 Sasa-DAA and 7 Sasa-DAB expressed alleles …

A unique species flock of large barbs (Barbus spp.) from Lake Tana is presented, from the
level of fish stocks to molecules. Evidence is given for the species status of 14 morphotypes …

Reproductive segregation among the large barbs Barbus intermedius complex, Cyprinidae,
of Lake Tana, Ethiopia, was investigated in the mouths and upstream reaches of rivers …