Table 1 Numbers of Galba truncatula harbouring Calicophoron daubneyi according to season and snail size

2007

Summer

0/1

1/9

1^c

1/6

1^c

1/3

1^c

3/19

3^c

Autumn

0/3

0/3

2008

Winter

1/13

1^b

0/33

4/67

2^a 2^b

3/75

3^a

1/41

1^b

0/5

9/234

5^a 4^b

Spring

5/11

5^b

17/39

4^a 13^b

4/23

4^b

1/12

1^b

3/24

1^a 1^b 1^c

1/12

1^b

31/121

5^a 25^b 1^c

Summer

1/8

1^a

10/53

7^a 2^b 1^c

2/23

2^a

0/3

13/87

10^a 2^b 1^c

Autumn

2/11

1^a 1^c

13/66

3^a 8^b 2^c

5/52

5^b

0/2

20/131

4^a 13^b 3^c

2009

Winter

0/46

3/105

3^a

3/123

2^a 1^b

1/75

1^c

0/23

0/7

7/379

5^a 1^b 1^c

Spring

0/21

5/70

3^a 1^b 1^c

4/58

2^a 1^b 1^c

0/14

1/4

1^a

10/167

6^a 2^b 2^c

TOTAL

9/111

2^a6^b1^c

49/378

20^a24^b 5^c

23/352

8^a 13^b2^c

6/184

3^a 1^b 2^c

5/92

2^a 2^b 1^c

1/24

1^b

93/1141

35^a47^b11^c