Outdoor mesocosms

At Eawag, there are two large outdoor observation tanks with a glass wall along one side to allow observations of fish behavior.

The two large outdoor observation tanks are 10 x 3 x 1.05 m and 15 x 3 x 1.4 m, with a combined volume of 94’000 L. The tanks can be partitioned lengthwise and crosswise to create smaller compartments. These tanks are connected to a flow-through system with a continuous supply of fresh water from Lake Lucerne.


In addition to the huge troughs, there are 40 blue 1000l mesocosms and many smaller black mesocosms in which we have run many experiments testing for eco-evolutionary feedbacks.