Supplementary Material
Table S1. Summary of numbers of webtagged brent goslings used to estimate pre-fledging survival. Webtags were
applied to goslings that we could assign to parents for which the use of a specific brood rearing area was known during
the prior five years
No. Applied based on brood rearing area used by parents
1987
Total
Bend
Hock
applied Captured
Camp Tutakoke Kashtut Slough Slough Emperor Punoarat
at Ringing
2
29
43
0
23
0
0
97
23
All
Subsequent
encounters
10
1988
13
31
84
15
25
0
0
168
33
4
1989
114
61
244
149
93
12
59
732
133
40
1990
115
45
423
207
149
14
177
1130
191
42
1991
154
71
362
162
133
25
116
1023
185
52
1992
196
53
380
114
112
34
190
1079
155
23
1993
180
50
321
116
149
51
251
1118
150
24
1994
115
73
310
172
222
54
183
1129
149
28
1995
166
60
452
189
204
82
176
1329
228
44
1996
117
40
388
106
287
67
131
1136
270
54
1997
117
153
44
154
131
171
21
62
736
113
14
Table S1 cont.
1998
186
68
441
194
228
45
9
1171
187
24
1999
180
34
364
270
259
27
16
1150
336
22
2000
133
43
286
277
262
22
14
1037
107
5
2001
4
3
8
6
17
3
0
41
0
0
2002
133
33
160
222
286
15
58
907
108
6
2003
32
9
45
58
56
7
45
252
8
1
2004
55
28
88
101
202
30
137
641
50
10
2005
115
46
91
100
147
13
193
705
235
20
TOTAL
2163
821
4644
2589
3025
522
1817
15581
2661
423
Table S2. Summary of ringings, recaptures, resightings, and hunter killed recoveries of black brent captured at Tutakoke
River, Alaska 1986-2007. Recaptures, winter resights, and shot columns indicate pooled numbers across ages and
gender.
Year
1986
Bend Slough
F
M
0
0
Camp
F
M
14
9
Emperor
F
M
0
0
Number Ringed
Goslings
Hock Slough
Kashtut
F
M
F
M
43
43
46
37
Number Reencountered
1987
104
86
58
53
0
0
86
81
249
263
0
0
94
86
0
0
393
376
45
0
63
1988
2
0
160
148
62
47
93
111
60
62
69
68
51
62
95
45
445
457
26
1499
48
1989
222
229
30
19
8
3
9
7
346
366
96
1223
0
0
18
6
644
679
356
3210
65
1990
106
83
185
188
30
25
135
133
223
224
0
0
47
46
39
14
515
570
493
3364
56
1991
30
35
90
109
94
93
120
139
257
227
140
125
23
26
26
19
477
472
583
1926
57
1992
14
11
71
86
75
72
227
225
65
68
161
124
57
62
52
24
404
423
779
984
86
1993
109
95
80
67
54
58
80
87
422
416
0
0
56
47
35
7
473
577
568
435
74
1994
46
51
113
99
51
62
303
325
22
19
0
0
14
11
6
9
284
299
375
1849
119
1995
154
148
94
110
0
0
156
151
217
164
0
0
32
48
12
7
306
403
656
2577
124
1996
23
24
185
177
4
8
461
342
137
112
0
0
102
99
32
16
280
365
1032
2216
105
1997
42
35
100
128
33
33
87
64
39
28
11
10
1
0
30
14
178
221
307
2370
153
1998
92
104
41
36
12
15
165
138
258
222
0
0
36
41
4
1
265
372
488
1960
142
1999
291
216
67
60
51
46
246
225
115
97
0
0
31
21
21
3
306
431
651
1030
132
2000
116
85
41
53
40
41
230
226
102
121
0
0
17
18
24
2
280
417
463
831
71
2001
0
0
0
0
13
6
0
0
0
0
0
0
0
0
0
0
7
9
4
360
59
2002
26
26
26
41
44
55
109
133
0
0
28
27
1
1
0
0
389
513
480
402
58
Punoarat
F
M
0
0
Tutakoke
F
M
41
53
Flighted
Juveniles
Adults
F
M
F
M
0
0
107 100
Recaps
0
Winter
Resights
0
Shot
3
Table 2 cont.
2003
0
0
2
5
0
0
4
1
4
7
0
0
7
7
1
0
11
15
33
312
51
2004
15
11
20
21
0
0
54
44
83
63
76
59
16
18
0
0
249
272
196
82
93
2005
19
23
156
144
0
0
85
96
142
130
0
0
68
58
19
8
242
348
436
0
50
2006
182
183
68
71
20
28
63
63
281
272
0
0
55
56
41
16
302
413
555
0
76
2007
101
112
49
47
7
8
39
24
35
32
0
0
31
28
46
24
119
160
326
0
32
TOTAL
1694
1557
1650
1671
598
600
2795
2658
3105
2930
581
536
780
788
501
215
6676
7892
8852
25407
1717