Ecological Archives E082-034-A2

Gilles Gauthier, Roger Pradel, Stéphane Menu, and Jean-Dominique Lebreton. 2001. Seasonal survival of Greater Snow Geese and effect of hunting under dependence in sighting probability. Ecology 82:3105-3119.

Appendix B.

Table A2. Results of test 2Cm* transformed in z values (see methods) separated by years and seasons. Component 2Cm* was calculated from the tables of component 2Cm of RELEASE and tests whether birds seen at time i are more or less likely to be seen at time i + 3 compared to those not seen then. This is a test for long-term dependence in sighting probabilities, i.e. between consecutive years within the same season (positive sign = positive dependence).

 

Spring to Spring
Summer to Summer
Autumn to Autumn
Year
Group†

 

z

 

P

 

z

 

P

 

z

 

P
1990
1

0.506
0.613
1991
1
-
-
-
-
-0.187
0.852
1992
1
1.629
0.103
-1.750
0.080
1.444
0.148
1993
1
2.752
0.006
-1.452
0.147
2.552
0.011
1994
1
-0.111
0.912
-1.234
0.217
3.817
<0.001
1995
1
1.020
0.308
-
-
2.273
0.023

2

2.336
0.019
1996
1
1.499
0.134
1.001
0.317
3.071
0.002

2
0.109
0.912
-0.729
0.465
3.840
<0.001
1997
1
-0.572
0.567
0.831
0.406

2
1.530
0.126
-0.621
0.535

Total
1
2.538
0.011
-1.165
0.244
5.093
<0.001

2
1.159
0.246
-0.955
0.340
4.368
<0.001

1+2
2.777
0.005
-1.495
0.135
6.551
<0.001

† Group 1: standard neck bands (used 1990-1994); Group 2: UV-resistant neck bands (used 1995-1997).

A dash (-) = not enough data.

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