Skip to main content

Table 1 Summary of the statistical models used to explain male investment in flies and silk added to the nuptial gift

From: Differential allocation in a gift-giving spider: males adjust their reproductive investment in response to female condition

Predictors

Estimate

SE

t- or z-value

p-value

Proportion of flies added to the gift

 Intercept (POOR females)

− 0.28 (0.43)

0.18

− 1.54

0.130

 GOOD females

− 0.41 (0.40)

0.24

− 1.71

0.093

 Time near the barrier

− 0.01 (0.50)

0.005

− 2.080

0.042

 GOOD females × Time near the barrier

0.02 (0.50)

0.007

2.498

0.016

Time adding silk before physical interaction

 Intercept (POOR females)

3.05

1.06

2.878

0.006

 GOOD females

0.01

0.02

0.236

0.814

 Time near the barrier

− 1.59

1.18

− 1.35

0.182

 GOOD females × Time near the barrier

0.03

0.03

0.897

0.373

Probability of adding more silk after physical interaction

 Intercept (POOR females)

0.57 (0.64)

0.58

0.99

0.051

 GOOD females

− 0.38 (0.41)

0.87

− 0.435

0.658

 Time previously invested in silk

− 0.52 (0.37)

0.22

− 2.411

0.016

 GOOD females × Previous invest in silk

0.01 (0.50)

0.35

0.038

0.970

Total time adding silk

 Intercept (POOR females)

3.79

0.50

7.597

< 0.001

 GOOD females

− 0.77

0.67

− 1.149

0.255

  1. For the models of Proportion of flies added to the gift and Probability of adding more silk before physical interaction, we report the estimate in logit units and present the original units in parentheses. Moreover, the model of Probability of adding more silk before physical interaction uses a z-value instead of a t-value as in the other models. Significant results are highlighted in bold. SE = standard error