Department Fish Ecology and Evolution

Fish Ecology & Evolution (FishEc)

We study ecology, evolution and biodiversity of fishes and other aquatic organisms. We are interested in the mechanisms that drive the origins, the maintenance and the loss of species, genetic and functional diversity.


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Fig. 1: The diverse demands placed on lakes were reflected by the wide variety of topics discussed at Eawag’s Info Day in Lucerne. (Photo: Peter Penicka)
September 16, 2016

Switzerland’s lakes are not only diverse ecosystems, but also recreation sites, fishing grounds and energy sources. At this year’s Info Day, the tensions between these competing interests were explored. It was concluded that sustainable management calls for an understanding of the complex interactions occurring in lakes – which in turn requires scientific data and appropriate methods of observation. Read more

Latest publications

September 2016:
What looks the same does not have to be the same species. Red and blue Pundamilia cichlid species are found in the main body of Lake Victoria and in a Gulf in the South of the lake.
Joana Meier shows through demographic modelling using whole-genome data that the red and blue cichlids sampled in the Gulf evolved independently from a hybrid swarm of the two red and blue species outside of the Gulf. We call this process “hybrid parallel speciation”.

Meier,J.I.; Sousa,V.C.; Marques,D.A.; Selz,O.M.; Wagner,C.E.; Excoffier,L.; Seehausen,O. (2016) Demographic modeling with whole genome data reveals parallel origin of similar Pundamilia cichlid species after hybridization, Molecular Ecology, doi:10.1111/mec.13838, Institutional Repository