Thursday, 10 September 2015

River sampling - 9 September 2015

Riverfly sampling - Sept 2015
Organisation: Abington Naturewatch
Site name: The Ford, Abington, Cambridge (not the usual place)
River: Granta
Grid ref: TL534490
Monitoring Group Coordinator: Rob Mungovan
Date: 09 September 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 200
Stoneflies: Nil
Gammarus (Freshwater shrimp): C, ca 100

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

Hatches seen: none
River low; fine, dry weather, cool evening; 3 kick-shuffles undertaken within the allotted 3 minutes (1. Some Weed (water crowfoot) with rocky gravel bottom; 2. Gravel/rocky bottom in main flow, deeper water; 3. Lower flow, rocky bottom, edge of weed).

Other fauna:
1 signal crayfish - 3cm
4 fish (stone loach) - 3 x 10-12cm, 2 x 5 cm

Non-sightings (we’ve often found these): leeches, worms, minnows etc.

Stone Loach
Signal Crayfish
Olive nymphs
Caddis larvae, Shrimp
Freshwater Shrimp
Caddis larva, Shrimp, Olive nymph 
Shrimp

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