This is an old article, reposted from the original WordPress incarnation of Not Exactly Rocket Science. I’m on holiday for the moment, but you can expect a few new pieces here and there (as well as ...

Biologists have genetically mapped the sex chromosomes of several species of cichlid fish from Lake Malawi, East Africa, and identified a mechanism by which new sex chromosomes may evolve. In research ...

There are about 16 species of Aulonocara cichlids in Lake Malawi, all of which feed in the sand. "These cichlids join a short list of fish that have been demonstrated to use their lateral line system ...

Sex-determining systems may evolve rapidly and contribute to lineage diversification. In fact, recent work has suggested an integral role of sex chromosome evolution in models of speciation. We use ...

Lake Tanganyika in Africa is a true hotspot of organismal diversity. Approximately 240 species of cichlid fishes have evolved in this lake in less than 10 million years. A research team from the ...