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Table 2 Results of comparative analysis of characteristic parameters between autumn and spring using paired t-test

From: A 30,000-km journey by Apus apus pekinensis tracks arid lands between northern China and south-western Africa

 

t

df

p value

All (N = 25)

Migration distance

4.59

24

1.18e−04

Detour

5.23

24

2.31e−05

Travel speed

− 1.88

24

0.07

Migration speed

− 9.52

24

1.27e−09

Total duration

11.851

24

1.62e−11

Stopover time

7.66

24

6.75e−08

Travel time

2.66

24

0.01

Female (N = 6)

Migration distance

0.42

5

0.69

Detour

0.55

5

0.61

Travel speed

− 2.44

5

0.06

Migration speed

− 6.02

5

0.002

Total duration

4.84

5

0.005

Stopover time

1.94

5

0.11

Travel time

2.40

5

0.06

Male (N = 15)

Migration distance

4.74

14

3.18e−04

Detour

5.91

14

3.78e−05

Travel speed

− 1.41

14

0.18

Migration speed

− 8.15

14

1.11e−06

Total duration

9.40

14

1.99e−07

Stopover time

8.08

14

1.23e−06

Travel time

1.62

14

0.13

  1. Significant effects are marked with bold