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Table 2 The effects of malondialdehyde concentration (MDA), total non-enzymatic antioxidant capacity (AOX), fat stores, and several weather parameters on nocturnal departure time of northern wheatears (Oenanthe oenanthe) in spring and song thrushes (Turdus philomelos) in autumn on Helgoland

From: The oxidative balance and stopover departure decisions in a medium- and a long-distance migrant

Northern wheatear (n = 54)

Song thrush (n = 45)

 

β ± SE

t

P

β ± SE

t

P

Without UA

      

MDA

− 0.01 ± 0.02

− 0.33

0.74

0.20 ± 0.65

0.31

0.76

AOX

3799 ± 2933

1.30

0.20

8449 ± 12,180

0.69

0.49

Fat stores

− 53.10 ± 10.92

− 4.86

 < 0.001

17.93 ± 34.40

0.52

0.61

Cloud cover

2.89 ± 4.91

0.59

0.56

12.95 ± 11.09

1.17

0.25

Temperature

18.10 ± 16.10

1.12

0.27

18.43 ± 22.54

0.82

0.42

u wind

− 1.02 ± 6.07

− 0.17

0.87

− 3.30 ± 8.13

− 0.41

0.69

v wind

− 6.78 ± 3.31

− 2.05

0.046

− 22.03 ± 21.06

− 1.05

0.30

With UA

With UA and UI

MDA

− 0.02 ± 0.02

− 0.69

0.49

0.24 ± 0.68

0.35

0.73

AOX

8111 ± 4772

1.70

0.096

25,836 ± 25,239

1.02

0.31

Fat stores

− 51.27 ± 11.0

− 4.66

 < 0.001

15.70 ± 34.77

0.45

0.65

UA

− 1316 ± 1151

− 1.14

0.26

− 5000 ± 4657

− 1.07

0.29

Cloud cover

3.22 ± 4.90

0.66

0.55

13.54 ± 11.19

1.21

0.23

Temperature

18.46 ± 16.05

1.15

0.26

19.65 ± 23.10

0.85

0.40

u wind

− 2.25 ± 6.15

− 0.37

0.71

− 2.72 ± 8.57

− 0.32

0.75

v wind

− 6.50 ± 3.31

− 1.97

0.056

− 21.32 ± 21.23

− 1.00

0.32

UI

   

20.43 ± 402.3

− 0.05

0.96

  1. Linear regression models were run without and with uric acid concentration (UA) as a covariate, and, for song thrush, without and with the unsaturation index (UI) as a covariate. Due to plasma volume limitation, in case of the northern wheatears sample size decreased by one in the latter analysis. Unstandardized coefficients (β) with standard error (SE) and the t-statistic (t) are presented