DORSET OTTER GROUP ANNUAL RESULTS
(2002-2003)
|
| | | No. Surveyed | Positive | Negative | % Positive |
| River Avon |
Spring 02 |
6 |
2 |
4 |
33.3 |
| Summer 02 |
6 |
1 |
5 |
16.7 |
| Autumn 02 |
5 |
0 |
5 |
0 |
| Winter 03 |
6 |
1 |
5 |
16.7 |
| Total |
29 |
4 |
25 |
13.8 |
| River Axe |
Spring 02 |
7 |
4 |
3 |
57.1 |
| Summer 02 |
2 |
1 |
1 |
50 |
| Autumn 02 |
2 |
1 |
1 |
50 |
| Winter 03 |
6 |
2 |
4 |
33.3 |
| Total |
17 |
8 |
9 |
47.1 |
| River Frome |
Spring 02 |
57 |
8 |
49 |
14 |
| Summer 02 |
42 |
8 |
34 |
19 |
| Autumn 02 |
36 |
7 |
29 |
19.4 |
| Winter 03 |
27 |
5 |
22 |
18.5 |
| Total |
162 |
28 |
134 |
17.3 |
| River Piddle |
Spring 02 |
13 |
3 |
10 |
23.1 |
| Summer 02 |
15 |
3 |
12 |
20 |
| Autumn 02 |
14 |
4 |
10 |
34.7 |
| Winter 03 |
16 |
4 |
12 |
25 |
| Total |
58 |
14 |
44 |
24.1 |
| Poole Harbour |
Spring 02 |
8 |
1 |
7 |
12.5 |
| Summer 02 |
5 |
0 |
5 |
0 |
| Autumn 02 |
10 |
0 |
10 |
0 |
| Winter 03 |
1 |
0 |
1 |
0 |
| Total |
24 |
1 |
23 |
4.2 |
| Upper Stour |
Spring 02 |
37 |
10 |
27 |
27 |
| Summer 02 |
52 |
14 |
38 |
26.9 |
| Autumn 02 |
56 |
10 |
46 |
17.8 |
| Winter 03 |
49 |
12 |
37 |
24.5 |
| Total |
194 |
46 |
148 |
23.5 |
| Lower Stour |
Spring 02 |
67 |
18 |
49 |
27.1 |
| Summer 02 |
52 |
6 |
46 |
11.5 |
| Autumn 02 |
42 |
7 |
35 |
16 |
| Winter 03 |
28 |
7 |
21 |
25 |
| Total |
189 |
38 |
151 |
20.1 |
| West Dorset Rivers |
Spring 02 |
49 |
18 |
31 |
36.7 |
| Summer 02 |
43 |
8 |
35 |
18.6 |
| Autumn 02 |
33 |
11 |
22 |
33.3 |
| Winter 03 |
45 |
12 |
33 |
26.3 |
| Total |
170 |
49 |
121 |
28.8 |
| River Wey and the Fleet |
Spring 02 |
11 |
0 |
11 |
0 |
| Summer 02 |
8 |
0 | 8 | 0 |
| Autumn 02 |
7 |
0 |
7 |
0 |
| Winter 03 |
10 |
1 |
9 |
10 |
| Total |
36 |
1 |
35 |
2.7 |
| River Yeo |
Spring 02 |
12 |
8 |
4 |
66.7 |
| Summer 02 |
8 |
4 |
4 |
50 |
| Autumn 02 |
5 |
2 |
3 |
40 |
| Winter 03 |
6 |
4 |
2 |
66.7 |
| Total |
31 |
18 |
13 |
58.1 |
| TOTAL | |
910 |
207 |
703 |
22.7 |
|