Hybridization boosts evolution

Animals that have either migrated to or been introduced in Central Europe, such as the Asian bush mosquito or the Asian ladybeetle, have adapted well to their new homes due to changing climatic conditions. If these newcomers ...

Brood parasitism in fish

There are other animals besides the cuckoo who smuggle their offspring into another animal's nest. The synodontis multipunctatus, which lives in Lake Tanganyika in Africa and is better known as the cuckoo catfish, is just ...

Evolution: On mosaics and melting-pots

Genetic studies of cichlid fishes suggest that interspecies hybrids played a prominent role in their evolution. Analysis of a unique fossil cichlid from the Upper Miocene of East Africa now provides further support for this ...

Fish cooperate for selfish reasons

Why do animals help raise offspring that aren't their own? A new study by an international team of researchers from Sweden, Canada and the UK shows that fish cooperate to raise another fish's offspring to reduce their own ...

How satellite data changed chimpanzee conservation efforts

Approximately 345,000 or fewer chimpanzees remain in the wild, according to the International Union for the Conservation of Nature, a substantial decline from the more than two million that existed a hundred years ago. Humans' ...

Lake Tanganyika fisheries declining from global warming

The decrease in fishery productivity in Lake Tanganyika since the 1950s is a consequence of global warming rather than just overfishing, according to a new report from an international team led by a University of Arizona ...

Predators drive social complexity

Variation in social organization and behavior of highly social animals like cichlids is primarily explained by predation risk and related ecological factors. This stresses the significance of predation for social evolution.

Cichlid sisters swim together in order to reach the goal

The manner and routes of dispersal vary with the species and the ecological conditions. Many fish form shoals to avoid predation. Shoaling with familiar conspecifics affords the fish an even greater advantage by increasing ...

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