The field works of aqua biological group to study and to gather the biological objects in the Luga River and its tributaries, Saba and the Jashera rivers in 2013, was finished on the 13th of September, 2013. There were seven trips in Luga district, during which more than 100 samples of biological objects were picked up in the pilot sites of the rivers. The pictures from the fifth trip (July 16-19, 2013) are presented.(download)