Table 5 Sample number, week of the year, year and the extrinsic and intrinsic variables included in the weekly sampling scheme of wintering whooper swans in Sanmenxia Swan National Wetland Park (daily data were pooled and averaged for each week): photo period (day length in minutes), mean weekly air temperature (°C), mean fecal glucocorticoid metabolite (FGM) concentration (pg/ml), home range (HR) size (km2) and the frequency of seven behaviors: vigilance (V), fighting (G), preening (P), resting (R), calling (C), locomotion (L) and foraging (F).

From: Extrinsic factors, endocrine mechanisms, and behavioral indicators of migratory restlessness in wintering whooper swans (Cygnus cygnus)

Sample no.

Week

Year

Day length

Mean. temp

Mean FGM

V

G

P

R

C

L

F

HR size

1

46

2017

619.0

9.50

28.41

0.08

0.00

0.07

0.09

0.02

0.31

0.42

1.69

2

47

2017

612.0

4.00

17.99

0.07

0.00

0.07

0.17

0.05

0.30

0.33

2.03

3

48

2017

603.0

5.50

24.58

0.08

0.00

0.12

0.22

0.04

0.22

0.31

2.04

4

49

2017

596.0

3.50

35.12

0.08

0.01

0.09

0.18

0.03

0.24

0.36

0.95

5

50

2017

551.0

2.25

29.89

0.06

0.00

0.10

0.26

0.04

0.21

0.34

0.39

6

51

2017

589.0

2.50

24.33

0.05

0.01

0.08

0.20

0.03

0.20

0.43

0.86

7

52

2017

590.0

3.25

23.79

0.10

0.00

0.09

0.17

0.04

0.19

0.40

0.95

8

1

2018

592.0

4.50

30.97

0.14

0.00

0.09

0.13

0.04

0.19

0.41

0.44

9

2

2018

599.0

− 2.50

23.91

0.12

0.00

0.14

0.08

0.04

0.17

0.45

0.28

10

3

2018

607.5

3.75

27.44

0.18

0.00

0.11

0.08

0.05

0.20

0.39

0.20

11

6

2018

642.0

− 0.25

25.80

0.14

0.01

0.19

0.12

0.05

0.25

0.24

0.55

12

7

2018

656.0

4.00

33.00

0.19

0.00

0.15

0.10

0.03

0.22

0.30

0.30

13

11

2018

716.0

12.50

46.80

0.21

0.00

0.16

0.05

0.02

0.27

0.29

1.71

14

12

2018

726.0

9.00

47.28

0.22

0.00

0.17

0.15

0.03

0.20

0.24

1.37

15

13

2018

741.0

19.00

89.44

0.17

0.01

0.13

0.13

0.04

0.19

0.32

2.22

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