Table 2 Sampling effort: Number of individual on which analyses are based per year and months

jan

5

5

0,31

fev

2

9

7

32

1

3

1

55

3,38

mar

2

3

8

2

1

3

13

8

2

42

2,58

avr

23

128

20

105

45

3

50

20

10

41

8

5

16

7

2

482

29,59

may

8

1

12

2

6

11

10

2

53

3,25

jun

3

129

1

14

69

21

1

33

2

19

29

9

46

6

25

407

24,98

jul

28

5

90

1

53

5

21

12

37

1

11

264

16,21

aug

25

1

3

2

54

18

103

6,32

sep

49

12

61

3,74

oct

15

3

10

9

3

36

76

4,67

nov

5

8

1

8

9

4

35

2,15

dec

7

7

26

2

4

46

2,82

Sum

54

262

1

34

353

70

33

154

56

57

105

58

215

107

24

5

41

1629

100

%

3,31

16,08

0,06

2,09

21,67

4,30

2,03

9,45

3,44

3,50

6,45

3,56

13,20

6,57

1,47

0,31

2,52

100