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Table 2 Tested behaviours, quantification method and results of analyses

From: Sexual signalling in female crested macaques and the evolution of primate fertility signals

Sex

Behaviour

Quantification

Pre-Fertile

Fertile

Post-Fertile

P value

Relationship to OV

Female

Approach and solicitation

Count offset for observation time (i.e. rate).

3.11

3.67

1.94

<0.001

+

 

Approach and parade (ritualized series of presentations involving passing back and forth in front of the male)

Count offset for observation time (i.e. rate).

0.68

0.79

0.43

<0.001

+

 

Lipsmack at male during copulation

Binary (female does or does not).

0.57

0.64

0.51

=0.003

+

 

Look at male during copulation

Binary (female does or does not)

0.91

0.91

0.88

p>0.1

None

 

Reach back to male during copulation

Binary (female does or does not)

0.38

0.44

0.36

<0.001

+

 

Give copulation call during copulation

Binary (female does or does not)

0.22

0.29

0.14

<0.001

+

Male

Ignore female approach

Binary (male does or does not)

0.49

0.47

0.41

p=0.009

-

 

Inspect female

Binary (male does or does not)

0.45

0.48

0.50

p>0.1

None

 

Mount female

Logged rate (n/hr)

2.68

3.56

2.28

P<0.001

+

 

Mate with female

Logged rate (n/hr)

2.71

3.52

2.27

P<0.001

+

 

Give copulation call during copulation

Binary (male does or does not)

0.41

0.57

0.53

P<0.001

+

  1. Mean values across all cycles are given for the 5 days before the fertile period (Pre-Fertile), the four day fertile period (Fertile) and the five days following the fertile period (Post-fertile). Values were first averaged across all cycles for each day with respect to the ovulation window, then across all days within each respective period. For rate behaviours, values given here are n/hr. For binary variables, values given are proportion of copulations in which the behaviour occurred. P values of the statistical test employed are given (see text for full statistical results).