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Table 2 Monthly abundance (number of individuals) of each sex and ovigerous condition, as well as monthly sex ratio at Saint Peter and Saint Paul Archipelago, Brazil

From: Biology of Grapsus grapsus (Linnaeus, 1758) (Brachyura, Grapsidae) in the Saint Peter and Saint Paul Archipelago, Equatorial Atlantic Ocean

Months

Male total

Female

Total

OV%

Sex ratio

NO

OV

Total

M:F

Sig

Feb 2003

74

17

17

34

108

50.0

1:0.5

*

Apr

34

17

7

24

58

29.2

1:0.7

NS

Jul

41

18

3

21

62

14.3

1:0.5

*

Nov

25

24

7

31

56

22.6

1:1.2

NS

Mar 2004

26

17

7

24

50

29.2

1:0.9

NS

Aug

29

18

6

24

53

25.0

1:0.8

NS

Nov

53

31

27

58

111

46.6

1:1.1

NS

Jan 2005

35

42

14

56

91

25.0

1.1.6

*

May

38

33

5

38

76

13.2

1:1

NS

Jul

22

17

1

18

40

5.6

1:0.8

NS

Total

377

234

94

328

705

28.7

1:0.9

NS

  1. NO not ovigerous, OV ovigerous, OV% percentage of ovigerous females in relation to total females
  2. * P < 0.05
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Helgoland Marine Research

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