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Table 1 Differences in return rates of semi-collared flycatchers between 2014 and 2015, and between control group and geolocator-tagged group

From: Cold spell en route delays spring arrival and decreases apparent survival in a long-distance migratory songbird

 

2014

2015

χ2

p value

Control

 Males

58.8% (30/51)

23.8% (19/80)

6.29

0.01

 Females

38.1% (24/63)

21.7% (15/69)

1.78

0.18

 2cy

64.3% (18/28)

51.4% (19/37) 

0.11

0.74

 2cy+

41.9% (36/86)

13.4% (15/112)

10.90

<0.001

 Total

47.4% (54/114)

22.8% (34/149)

7.87

0.005

Tagged

 Males

47.1% (8/17)

18.5% (5/27)

1.31

0.25

 Females

13.0% (3/23)

9.1% (2/22)

1.4e−30

1

 2cy

37.5% (6/16)

21.4% (3/14)

0.11

0.75

 2cy+

20.8% (5/24)

11.4% (4/35)

0.23

0.63

 Total

27.5% (11/40)

14.3% (7/49)

0.99

0.32

 

Control

Tagged

χ2

p value

2014–2015

 Males

37.4% (49/131)

29.5% (13/44)

0.24

0.63

 Females

29.5% (39/132)

11.1% (5/45)

3.22

0.07

 2cy

56.9% (37/65)

30.0% (9/30)

1.68

0.20

 2cy+

25.8% (51/198)

15.3% (9/59)

1.39

0.24

 Total

33.5% (88/263)

20.2% (18/89)

2.69

0.10

  1. Significant differences are given in italics