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Table 1 Contingency table to test the independence between sperm collection success and the birds’ behaviour

From: Sperm collection in Black-legged Kittiwakes and characterization of sperm velocity and morphology

 

No specific behaviour

Female begging for food

Male about to mount

Copulation occurred recently

Row totals

Successful collection

19

22.4%

24.8%

5

5.9%

5.4%

4

4.7%

1.6%

0

0%

1%

28

Unsuccessful collection

45

52.9%

50.5%

9

10.6%

11%

0

0%

3.2%

3

3.5%

2.3%

57

Column totals

64

14

4

3

85

  1. Number, observed percentage and expected percentage (in italic) under H0 (independence between sperm collection success and the birds’ behaviour) for successful (≥ 10 viable sperm in the ejaculate) and unsuccessful sperm collection according to the pair’s behaviour immediately before male capture