Table 1 Inter-annual comparison of mean (± SD) short foraging trip parameters in short-tailed shearwaters rearing chicks at two breeding colonies

9

8

4

16.2 ± 1.1

16.2 ± 1.4

17.2 ± 3.2

1.29

2, 18

0.30

188.8 ± 58.6

182.1 ± 72.5

159.5 ± 51.7

2.27

2, 18

0.13

41.2 ± 8.6

41.9 ± 18.0

26.0 ± 9.1

0.15

2, 18

0.86

138.5 ± 109.9

91.5 ± 102.3

202.3 ± 38.7

2.21

2, 18

0.14

663.3 ± 217.8

827.1 ± 379.2

561.9 ± 214.3

1.28

2, 18

0.30

124.0 ± 33.2

179.0 ± 86.0

118.1 ± 69.3

1.93

2, 18

0.17

9

1^a

10

18.9 ± 7.1

18.2

25.3 ± 11.4

2.06

1, 17

0.17

269.2 ± 143.1

276.0

581.3 ± 222.4

8.93

1, 17

0.008

78.3 ± 35.0

107.2

156.6 ± 54.4

10.34

1, 17

0.005

148.6 ± 54.4

115.9

158.9 ± 63.2

0.11

1, 17

0.74

1301.7 ± 687.7

1180.9

3271.1 ± 1406.1

14.48

1, 17

0.001

193.6 ± 124.6

182.3

606.2 ± 288.9

15.66

1, 17

0.001