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TEST VALLEY.

Anton Lakes.

Rooksbury Mill.

Tadburn.

Valley Park.

Anton Lakes

 

2003

2004

2005

2006

2007

 

2008

 

2009

2010

 

 

 

 

 

 

 

21/06

29/06

22/5

16/06

16/06

17/06

24/06

06/07

All Caddis

2.5

0.7

1.8

 

0.0

2.5

0.0

1.3

1.3

2.1

1.6

0.8

Caddis - stone

 

 

0.4

 

0.0

0.0

0.0

0.0

0

0.4

0.8

0.4

Damselfly nymph

0.5

0.9

0.6

 

1.9

2.5

2.5

2.5

2.5

1.7

7.5

0.8

Diving Beetle

3

0.5

0

 

0.0

0.0

0.0

0.6

1.9

1.3

3.3

0.0

Dragonfly - darter/chaser

0

0.1

0.1

 

0.6

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Dragonfly - hawker

0

0

0

 

0.0

2.5

0.0

1.3

1.3

0.8

0.8

0.0

Freshwater Shrimp

6

2.5

2.6

 

3.8

2.5

8.8

7.5

6.3

16.3

7.5

6.3

Hoglouse

2.5

1.6

2

 

7.5

2.5

5.0

15.3

7.5

5.4

16.2

5.8

Lesser Water Boatman

22.5

21.5

54.2

 

6.3

2.5

5.0

15.3

3.8

23.0

24.7

12.1

Mayfly nymph

3

1

0.5

 

3.8

2.5

2.5

1.9

1.3

2.1

2.5

8.5

Waterflea - Daphnia

52

62.9

321.8

 

150.0

150.0

94.3

131.3

112.5

112.6

87.8

112.5

The data below has been gathered during school visits. A typical collecting day consists of 4 sessions. 6 groups of children in each session collect from the water using nets with 1 mm mesh. These are sorted through in white trays and a selection of animals taken from the trays and put into smaller pots. Animals from all trays are used to compile a list for the day. Towards the end of the session, each group estimates the numbers of  particular animal types in their tray. The numbers shown below are intended to show  the contents of a typical tray from the sampling effort of  all visits for the years 2003 - 2005 and for each day visit for 2007 - 2008. No quantitative data was recorded in 2006.

 

Although there is considerable variation in the collecting effort and accuracy of each group, the number of repetitions does provide a degree of validity to the data, at least with respect to observing trends, and this is the main reason for gathering the data.

Animals recorded during the school visits

Anton Lakes

 

 

 

 

 

 

 

22_05_08

16_06_08

16_06_09

17_06_10

24_06_10

06_07_10

 

 

 

 

 

 

 

Hydra

 

 

 

 

X

 

Flatworm

X

X

X

 

 

X

Worm - Lumbriculus

 

 

 

 

X

 

Leech - Erpobdella octolucata

 

X

X

 

X

X

Bird Leech

 

 

X

 

 

X

Fish Leech - Piscicola

 

 

 

 

X

X

Fish Leech - Hemiclepsis

 

 

 

 

X

X

Great Pond Snail

 

X

X

 

X

X

Ramshorn Snail

X

X

X

 

X

X

Orb Shell

X

X

X

 

X

X

Mite

X

X

X

 

X

X

Waterflea - Daphnia

X

X

X

 

X

X

Waterflea - Cyclops

 

X

X

 

X

X

Freshwater Shrimp

X

X

X

 

X

X

Hog-louse

X

X

X

 

X

 

Mayfly

X

X

X

 

X

X

Hawker Dragonfly

 

X

X

 

X

 

Damselfly

X

X

X

 

X

X

Pond Skater

 

 

 

 

X

X

Water Stick-insect

X

X

X

 

X

X

Greater Waterboatman

X

X

X

 

X

X

Lesser Waterboatman

X

X

X

 

X

X

Lesser Back-swimmer

X

 

X

 

 

 

Alderfly

X

 

 

 

 

X

Caddis - green leaf case

 

X

 

 

 

 

Caddis - stick case

 

 

X

 

X

 

Caddis - transparent

X

 

X

 

 

 

Bloodworm

X

X

X

 

X

X

Non-biting Midge

X

 

 

 

X

 

Scavenger Beetle

 

 

 

 

 

X

Water  Beetle - Haliplidae

 

 

 

 

 

X

Diving Beetle - Dytiscidae

 

 

 

 

X

X

Diving Beetle -Platambus

 

X

X

 

 

X

Fish Fry

 

X

X

 

X

 

Bullhead

X

X

X

 

 

X

Pike

X

 

X

 

 

 

Smooth Newt

 

X

X

 

X

X

Common Toad

X

X

X

 

 

 

Common Frog

 

X

X