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Table 3 Sex ratio and inferred reproductive mode in European Triops cancriformis. The number (n) of individual males and females/hermaphrodites and the male proportion per pond are given. The results of the Chi-Square test to infer deviations from a null hypothesis of equal sex ratio and the inferred type of reproductive mode are provided (see text). In the populations investigated here, the collection year is indicated under the Reference heading.

From: Recent evolution of alternative reproductive modes in the 'living fossil' Triops cancriformis

Location

nmale

nfemale/hermaphrodite

prop. of males

p value (Chi-Square)

Inferred reproductive mode

Reference

Baillargues, France

0

200

0.000

<0.0001

hermaphrodite

[35]

Neuburg, Germany

0

102

0.000

<0.0001

hermaphrodite

own data (2004–2006)

Jaktorów, Poland

0

40

0.000

<0.0001

hermaphrodite

[75]

Zabieniec, Poland

0

40

0.000

<0.0001

hermaphrodite

[75]

Godshill pond, United Kingdom

0

25

0.000

<0.0001

hermaphrodite

this paper (2004–2006)

Königswartha (KOE25), Germany

2

32

0.059

<0.0001

androdioecious

this paper (2006)

Bavaria, Germany

8

1000

0.008

<0.0001

androdioecious

[76]

Augsburg, Germany

7

568

0.012

<0.0001

androdioecious

[77]

Königswartha (KOE12), Germany

10

95

0.095

<0.0001

androdioecious

this paper (2004 to 2006)

Cracow, Poland

16

144

0.100

<0.0001

androdioecious

[78]

Königswartha (KOE27), Germany

14

123

0.102

<0.0001

androdioecious

this paper (2006)

Wroclaw, Poland

114

912

0.111

<0.0001

androdioecious

[79]

unknown location, Hungary

9

34

0.209

0.0001

androdioecious

[80]

Wroclaw, Poland

29

88

0.248

<0.0001

androdioecious

[79]

Lake Balaton, Hungary

15

45

0.250

0.0001

androdioecious

[81]

Lake Balaton, Hungary

7

19

0.269

0.0186

androdioecious

[81]

Cracow, Poland

154

395

0.281

<0.0001

androdioecious

[78]

Algarve, Portugal

19

23

0.452

0.5371

bisexual

[82]

Algarve, Portugal

54

22

0.711

0.0002

bisexual

[82]

Espolla, Spain

64

57

0.529

0.5245

bisexual

this paper (2006)

Espolla, Spain

1723

1775

0.493

0.3872

bisexual

[33]