River sampling - August 2015

We had a fine, dry and warm evening on 12th August for our sampling session near the cricket nets. The river was very low and we used the usual 3 kick-shuffles of one minute each in three slightly different places, all under trees which are increasingly shading the river.
(1. Gravel/rocky bottom in main flow; 2. Some Weed (water crowfoot) with rocky gravel bottom; 3. Deeper water, rocky bottom)

We submitted the following report on the Riverfly monitored species:

Organisation: Abington Naturewatch
Site name: Cricket Pitch Reach, Abington, Cambridge
River: Granta
Grid ref: TL534490
Monitoring Group Coordinator: Rob Mungovan
Date: 12 August 2015, 6.30pm
Recorded by: Peter Brunning

Cased caddisfly: Nil
Caseless caddisfly: B, ca 10
Mayfly (Ephemeridae):  Nil
Blue-winged olive (Ephemeridae): Nil
Flat bodied up-wings (Heptageniidae): Nil
Olives (Baetidae): C, ca 100
Stoneflies: Nil
Gammarus (Freshwater shrimp): B, ca 20

[A:1-9; B:10-99; C:100-999;D:>1000]

A few photos were taken: 

Olive

Caddis

Caddis

Freshwater Shrimp (Gammarus)

In addition to the monitored species, we caught 3 small signal crayfish - 7cm, 5cm, 2cm

Signal Crayfish