March 24, 2022 – Our Laboratory for Fish and Aquatic Ecosystems recently conducted a study of interstitial fauna in the Sava River in Slovenia with colleagues from the Faculty of Science, University of Zagreb and Ruđer Bošković Institute in Zagreb. The aim of the project is to investigate the hyporheic interstitial biocenosis between the surface water of the Sava River and groundwater (water-saturated area below and along the riverbed). Sampling methods with a portable Bou-Rouch pump and the Karaman-Chappuis method were used for the study.
For those willing to know more…
The Karaman-Chappuis sound (or KC method) is effective at river banks, particularly gravel banks. A hole in the gravel or sand can be dug using a shovel; the water that collects in that hole can then be ladled out and filtered through a hand net.
The portable Bou-Rouch pump (Bou, 1974) can be used wherever there is groundwater close to the surface. Pumping should be undertaken in different locations and depths. The content of the net has to be processed in the same way as that from the Karaman-Chappuis sound.
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