Table 2:
The number of sites occupied by the native species and the alien brook trout (
Salvelinus fontinalis
). Total number of sites was 78 in both years.
Species
Number of sites (1994)
Number of sites (2004)
Difference
Salmo trutta
1+
56
64
8
Salmo trutta
0+
32
23
−9
Salvelinus fontinalis
1+
21
28
7
Salvelinus fontinalis
0+
15
27
12
Lampetra planeri
32
22
−10
Phoxinus phoxinus
37
54
17
Lota lota
32
7
−25
Cottus gobio
69
70
1
Thymallus thymallus
8
12
4
Pungitius pungitius
16
20
4