Adelie penguins on Signy Island

Population size and breeding success of Adelie penguins on Signy Island from 1978 to 2020.

This dataset pertains to Adelie penguin breeding success at selected colonies on Signy island from 1978 to 2020. It comprises annual ground counts of occupied and incubating nests, eggs (proxy for breeding pairs), chicks hatched, and chicks expected to fledge. The GPS locations for surveyed sites are also included. From the 1996-1997 season onwards, this dataset conforms to CCAMLR data collection standards and contributes to the CCAMLR Ecosystem Monitoring Program (CEMP). Ecosystems component of BAS Polar Science for Planet Earth Programme, funded by NERC.

Category: Animal


ID Season Date of nest count Total number of nests Date chick count Total number of chicks Comments
1 A41 NA 0 Only total number pairs counted
2 A1 NA 0 Only total number pairs counted
3 A2 NA 0 Only total number pairs counted
4 A3 NA 0 Only total number pairs counted
5 A4 NA 0 Only total number pairs counted
6 A1 24/12/1979 999 NA
7 A2 24/12/1979 606 NA
8 A3 24/12/1979 319 NA
9 A4 24/12/1979 284 NA
10 A41 20/12/1979 622 NA
11 A1 19/12/1980 1089 2 counts 547 + 443
12 A2 26/12/1980 671 2 counts 400 + 310
13 A3 19/12/1980 414 2 counts 275 + 157
14 A4 19/12/1980 415 2 counts 158 + 202; no data on nests with no eggs
15 A1 22/12/1981 1057 NA
16 A2 22/12/1981 657 NA
17 A3 22/12/1981 380 NA
18 A4 22/12/1981 270 NA
19 A1 27/12/1982 1041 Only total number of pairs + chick and fledgling count made
20 A2 27/12/1982 747 Only total no of pairs + chick and fledgling count made
21 A3 27/12/1982 347 Only total no of pairs + chick and fledgling count made
22 A4 27/12/1982 280 Only total no of pairs + chick and fledgling count made
23 A41 27/12/1982 381 Only total no of pairs + chick and fledgling count made
24 A1 30/12/1983 900 Only total number of pairs for pair count
25 A2 30/12/1983 572 Only total number of pairs for pair count
26 A3 30/12/1983 332 Only total number of pairs for pair count
27 A4 30/12/1983 287 Only total number of pairs for pair count
28 A41 31/12/1983 320 Only total number of pairs for pair count
29 A1 20/12/1984 1132 NA
30 A2 20/12/1984 776 NA
31 A3 20/12/1984 343 NA
32 A4 20/12/1984 309 NA
33 A41 21/12/1984 405 NA
34 A1 24/12/1985 1203 NA
35 A2 24/12/1985 791 NA
36 A3 24/12/1985 540 NA
37 A4 24/12/1985 382 NA
38 A41 23/12/1985 500 NA
39 A1 14/12/1986 1486 NA
40 A2 14/12/1986 983 NA
41 A3 14/12/1986 526 NA
42 A4 14/12/1986 422 NA
43 A62 14/12/1986 33 Only total number of pairs
44 A63 14/12/1986 19 Only total number pairs counted;fledglings not counted
45 A64 14/12/1986 31 Only total number pairs counted
46 A41 16/12/1986 402 No data on nests with no eggs
47 A1 16/12/1987 913 Only total number pairs counted; fledgling count for A1+A60
48 A2 16/12/1987 973 Only total number pairs counted
49 A3 16/12/1987 407 Only total number pairs counted; fledgling count for A3+A63
50 A4 16/12/1987 343 Only total number pairs counted
51 A60 16/12/1987 1 Only total number pairs counted;for fledgling count see colony A1
52 A62 16/12/1987 37 Only total number pairs counted
53 A63 16/12/1987 23 Only total number pairs counted; for fledgling count see colony A3
54 A64 16/12/1987 39 Only total number pairs counted
55 A41 17/12/1987 335 Only total number pairs counted
56 A41 16/12/1988 499 NA
57 A1 17/12/1988 1454 NA
58 A2 17/12/1988 973 Fledgling count for A2+A62
59 A3 17/12/1988 248 Fledgling count for A3+A63
60 A4 17/12/1988 246 Fledgling count for A4+A64
61 A60 17/12/1988 0 NA
62 A62 17/12/1988 59 For fledgling count see A2
63 A63 17/12/1988 24 For fledgling count see A3
64 A64 17/12/1988 35 For fledgling count see A4
65 A1 14/12/1989 1191 NA
66 A2 14/12/1989 900 NA
67 A3 14/12/1989 396 NA
68 A4 14/12/1989 286 NA
69 A41 14/12/1989 427 NA
70 A60 14/12/1989 105 NA
71 A62 14/12/1989 47 NA
72 A63 14/12/1989 16 NA
73 A64 14/12/1989 21 NA
74 A63 14/12/1990 6 NA
75 A64 14/12/1990 10 NA
76 A62 14/12/1990 25 NA
77 A1 14/12/1990 530 NA
78 A2 14/12/1990 427 NA
79 A3 14/12/1990 196 NA
80 A4 14/12/1990 126 NA
81 A41 15/12/1990 120 NA
82 A60 14/12/1990 37 NA
83 A41 14/12/1991 264 NA
84 A1 15/12/1991 1031 Fledgling count for A1+A60
85 A2 15/12/1991 417 Fledgling count for A2+A63
86 A3 15/12/1991 156 NA
87 A4 15/12/1991 183 NA
88 A60 15/12/1991 107 For fledgling count see A1
89 A62 15/12/1991 43 NA
90 A63 15/12/1991 9 For fledgling count see A2
91 A64 15/12/1991 17 NA
92 A41 14/12/1992 264 NA
93 A1 13/12/1992 1383 Fledgling count for A1+A60
94 A2 13/12/1992 955 NA
95 A3 13/12/1992 443 NA
96 A4 13/12/1992 322 NA
97 A60 13/12/1992 173 See fledgling count for A1
98 A62 13/12/1992 55 NA
99 A63 13/12/1992 27 NA
100 A64 13/12/1992 72 NA
101 A41 10/12/1993 222 NA
102 A1 12/12/1993 1106 Fledgling count for A1+A60+A63
103 A2 12/12/1993 466 NA
104 A3 12/12/1993 68 NA
105 A4 12/12/1993 81 NA
106 A60 12/12/1993 118 See fledgling count for A1
107 A62 12/12/1993 21 NA
108 A63 12/12/1993 7 See fledgling count for A1
109 A64 12/12/1993 2 NA
110 A1 12/12/1994 349 Fledgling count for A1+A60
111 A2 12/12/1994 121 NA
112 A3 12/12/1994 10 NA
113 A4 12/12/1994 44 NA
114 A60 12/12/1994 16 See fledgling count for A1
115 A62 12/12/1994 10 NA
116 A63 12/12/1994 0 NA
117 A64 12/12/1994 2 NA
118 A41 16/12/1994 188 No fledgling count data
119 A1 10/12/1995 1039 NA
120 A2 10/12/1995 602 NA
121 A3 10/12/1995 257 NA
122 A4 10/12/1995 193 NA
123 A41 12/12/1995 163 NA
124 A60 10/12/1995 107 NA
125 A62 10/12/1995 33 NA
126 A63 10/12/1995 10 NA
127 A64 10/12/1995 54 NA
128 A1 13/12/1996 1257 Fledgling count for A1+A60+A63
129 A2 13/12/1996 680 NA
130 A3 13/12/1996 343 NA
131 A4 13/12/1996 312 Fledgling count for A4+A64
132 A60 13/12/1996 189 See fledgling count for A1
133 A62 13/12/1996 45 NA
134 A63 13/12/1996 16 See fledgling count for A1
135 A64 13/12/1996 79 See fledgling count for A4
136 A41 15/12/1996 175 NA
137 A1 NA 0 Sea ice prevented base opening until January
138 A2 NA 0 Sea ice prevented base opening until January
139 A3 NA 0 Sea ice prevented base opening until January
140 A4 NA 0 Sea ice prevented base opening until January
141 A41 NA 0 Sea ice prevented base opening until January
142 A60 NA 0 Sea ice prevented base opening until January, no pair/egg/chick counts. For fledgling count see A1 Adelie penguin,1997-1998,A62,NA,NA,NA,NA,NA,NA,NA,NA,1998-01-19,45,Sea ice prevented base opening until January, no pair/egg/chick counts Adelie penguin,1997-1998,A63,NA,NA,NA,NA,NA,NA,NA,NA,NA,NA,Sea ice prevented base opening until January
143 A64 NA 0 Sea ice prevented base opening until January
144 A1 + A60 15/12/1998 1641 NA
145 A2 15/12/1998 783 NA
146 A3 15/12/1998 343 NA
147 A4 15/12/1998 289 NA
148 A62 15/12/1998 39 NA
149 A63 15/12/1998 10 NA
150 A64 15/12/1998 83 NA
151 A41 15/12/1998 192 NA
152 A1 + A60 19/12/1999 376 NA
153 A2 19/12/1999 238 NA
154 A3 19/12/1999 83 NA
155 A4 19/12/1999 74 NA
156 A41 19/12/1999 14 NA
157 A62 19/12/1999 17 NA
158 A63 19/12/1999 4 NA
159 A64 19/12/1999 28 NA
160 A1 + A60 16/12/2000 1031 NA
161 A2 16/12/2000 474 NA
162 A3 16/12/2000 195 NA
163 A4 16/12/2000 185 NA
164 A41 16/12/2000 60 NA
165 A62 16/12/2000 34 NA
166 A63 16/12/2000 7 NA
167 A64 16/12/2000 185 NA
168 A1 + A60 17/12/2001 1255 NA
169 A2 17/12/2001 545 NA
170 A3 17/12/2001 229 NA
171 A4 17/12/2001 225 NA
172 A41 17/12/2001 40 NA
173 A62 17/12/2001 37 NA
174 A63 17/12/2001 8 NA
175 A64 17/12/2001 65 NA
176 A1 + A60 19/12/2002 1392 NA
177 A2 19/12/2002 622 NA
178 A3 19/12/2002 240 NA
179 A4 19/12/2002 200 NA
180 A41 19/12/2002 39 NA
181 A62 19/12/2002 43 NA
182 A63 19/12/2002 7 NA
183 A64 19/12/2002 74 NA
184 A1 + A60 21/12/2003 825 NA
185 A2 21/12/2003 362 NA
186 A3 21/12/2003 154 NA
187 A4 21/12/2003 146 NA
188 A62 21/12/2003 30 NA
189 A63 21/12/2003 2 NA
190 A64 21/12/2003 44 NA
191 A41 21/12/2003 32 NA
192 A1 + A60 21/12/2004 1015 NA
193 A2 21/12/2004 387 NA
194 A3 21/12/2004 159 NA
195 A4 21/12/2004 113 NA
196 A62 21/12/2004 8 NA
197 A63 21/12/2004 3 NA
198 A64 21/12/2004 37 NA
199 A41 21/12/2004 15 NA
200 A1 + A60 23/12/2005 839 NA
201 A2 23/12/2005 344 NA
202 A3 23/12/2005 86 NA
203 A4 23/12/2005 108 NA
204 A41 23/12/2005 7 NA
205 A62 23/12/2005 0 NA
206 A63 23/12/2005 1 NA
207 A64 23/12/2005 38 NA
208 A1 + A60 22/12/2006 603 NA
209 A2 22/12/2006 519 NA
210 A3 22/12/2006 254 NA
211 A4 22/12/2006 136 NA
212 A41 22/12/2006 0 NA
213 A62 22/12/2006 0 NA
214 A63 22/12/2006 2 NA
215 A64 22/12/2006 37 NA
216 A1 + A60 21/12/2007 432 Comments for nest count and chick count: large number of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nests and eggs. Colonies in low lying areas
217 A2 21/12/2007 146 Comments for nest count and chick count: large number of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nests and eggs. Colonies in low lying areas
218 A3 21/12/2007 6 Comments for nest count and chick count: large number of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nests and eggs. Colonies in low lying areas
219 A4 21/12/2007 38 Comments for nest count and chick count: large number of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nests and eggs. Colonies in low lying areas
220 A62 21/12/2007 0 Comments for nest count and chick count: large number of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nests and eggs. Colonies in low lying areas
221 A63 21/12/2007 0 Comments for nest count and chick count: large number of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nests and eggs. Colonies in low lying areas
222 A64 21/12/2007 8 Comments for nest count and chick count: large number of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nests and eggs. Colonies in low lying areas
223 A41 21/12/2007 2 General comments: Continued decline not due to snow: area clear; Nest and chick count comments: Large numbers of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nest and eggs. Colonies in low lying areas
224 A41 9/12/2008 0 Large numbers of nests abandoned in all colonies due to snow covering them and subsequent meltwater inundating nest and eggs. Colonies in low lying areas
225 A1 + A60 6/12/2008 1296 Logistical constraints prevented fledgling counts from being carried out at the optimum time. Most chicks had fledged and gone to sea by the time these figures were obtained. Mean number of chicks per colony and no. chicks fledged per pair are therefore unreliable for this year.
226 A2 6/12/2008 481 Earlier than expected fledging (even earlier at N Point) with most chicks leaving between chronology counts resulted in few chicks remaining.
227 A3 6/12/2008 194 Earlier than expected fledging (even earlier at N Point) with most chicks leaving between chronology counts resulted in few chicks remaining.
228 A4 6/12/2008 127 Earlier than expected fledging (even earlier at N Point) with most chicks leaving between chronology counts resulted in few chicks remaining.
229 A62 6/12/2008 0 Earlier than expected fledging (even earlier at N Point) with most chicks leaving between chronology counts resulted in few chicks remaining.
230 A63 6/12/2008 0 Earlier than expected fledging (even earlier at N Point) with most chicks leaving between chronology counts resulted in few chicks remaining.
231 A64 6/12/2008 46 Earlier than expected fledging (even earlier at N Point) with most chicks leaving between chronology counts resulted in few chicks remaining.
232 A41 16/12/2009 0 Old chronology colony No Active nests; Fledgling comments: Earlier than expected fledging (even earlier at N Point) with most chicks leaving between chronology counts resulted in few chicks remaining.
233 A1 + A60 16/12/2009 163 General comments: 128 x ""0 egg"" nests are failed nests. Includes small colony to the south of A1; Chick count comments: empty nests calc from original pop size owing to old nests under refurbishment by non breeders (where these old nests were prev covered by snow / ice) and new empty nests prob arising due to increased non breeder activity in the colonies (where approx 90% of individuals seen were either failed or non breeding birds and partners). NB unusual to see so many partners attending occupied nests - seen at Gourlay also for at least a week prior to North Point count.
234 A2 16/12/2009 142 General comments: 30 x ""0 egg"" nests are failed nests; Chick count comments: empty nests calc from original pop size owing to old nests under refurbishment by non breeders (where these old nests were prev covered by snow / ice) and new empty nests prob arising due to increased non breeder activity in the colonies (where approx 90% of individuals seen were either failed or non breeding birds and partners). NB unusual to see so many partners attending occupied nests - seen at Gourlay also for at least a week prior to North Point count.
235 A3 16/12/2009 29 General comments: 23 x ""0 egg"" nests are failed nests; Chick count comments: empty nests calc from original pop size owing to old nests under refurbishment by non breeders (where these old nests were prev covered by snow / ice) and new empty nests prob arising due to increased non breeder activity in the colonies (where approx 90% of individuals seen were either failed or non breeding birds and partners). NB unusual to see so many partners attending occupied nests - seen at Gourlay also for at least a week prior to North Point count.
236 A4 16/12/2009 57 General comments: 3 x ""0 egg"" nests are abandoned; Chick count comments: empty nests calc from original pop size owing to old nests under refurbishment by non breeders (where these old nests were prev covered by snow / ice) and new empty nests prob arising due to increased non breeder activity in the colonies (where approx 90% of individuals seen were either failed or non breeding birds and partners). NB unusual to see so many partners attending occupied nests - seen at Gourlay also for at least a week prior to North Point count.
237 A62 16/12/2009 0 General comments: colony is abandoned; Chick count comments: empty nests calc from original pop size owing to old nests under refurbishment by non breeders (where these old nests were prev covered by snow / ice) and new empty nests prob arising due to increased non breeder activity in the colonies (where approx 90% of individuals seen were either failed or non breeding birds and partners). NB unusual to see so many partners attending occupied nests - seen at Gourlay also for at least a week prior to North Point count.
238 A63 16/12/2009 0 General comments: colony is abandoned; Chick count comments: empty nests calc from original pop size owing to old nests under refurbishment by non breeders (where these old nests were prev covered by snow / ice) and new empty nests prob arising due to increased non breeder activity in the colonies (where approx 90% of individuals seen were either failed or non breeding birds and partners). NB unusual to see so many partners attending occupied nests - seen at Gourlay also for at least a week prior to North Point count.
239 A64 16/12/2009 3 General comments: 4 x "0 egg"" nests are abandoned . Nest count originally entered as 17-DEC
240 A1 + A60 21/12/2011 1340 No nest counts made as assistant did not arrive on time
241 A2 NA 0 No nest counts made as assistant did not arrive on time
242 A3 NA 0 No nest counts made as assistant did not arrive on time
243 A4 NA 0 No nest counts made as assistant did not arrive on time
244 A41 NA 0 No nest counts made as assistant did not arrive on time; Chick count: no chicks in colony
245 A62 NA 0 No nest counts made as assistant did not arrive on time; fledglings counted as part of colony A2
246 A63 NA 0 No nest counts made as assistant did not arrive on time; no signs of nests in fledgling count
247 A64 NA 0 No nest counts made as assistant did not arrive on time
248 A1 + A60 21/12/2011 1340 NA
249 A2 21/12/2011 480 NA
250 A3 21/12/2011 234 NA
251 A4 21/12/2011 138 NA
252 A62 21/12/2011 0 Colony is extinct: no birds/nests present.
253 A63 21/12/2011 0 Colony is extinct: no birds/nests present.
254 A64 21/12/2011 26 NA
255 A41 23/12/2011 0 Colony is extinct: no birds present. Evidence of 1 failed nest attempt this season.
256 A39 23/12/2011 505 General comments: It was decided to start monitoring this colony to see if using it for chronology affects the number of pairs and Fledgling comments: This value was taken from the creche size counts and it is the largest value that was counted during the period when the colony was monitored for fledging
257 A1 + A60 27/12/2012 793 Nest count comments: Nests with 1 Chick=9; Nests with 1 Egg+1 Chick=18; Nests with 2 Chicks=16
258 A2 27/12/2012 220 Nest count comments: Nests with 1 Chick=5; Nests with 1 Egg+1 Chick=5; Nests with 2 Chicks=5;
259 A3 27/12/2012 44 Nest count comments: Nests with 1 Chick=0; Nests with 1 Egg+1 Chick=0; Nests with 2 Chicks=0
260 A4 27/12/2012 35 Nest count comments: Nests with 1 Chick=0; Nests with 1 Egg+1 Chick=0; Nests with 2 Chicks=1
261 A64 27/12/2012 2 Nest count comments: Nests with 1 Chick=0; Nests with 1 Egg+1 Chick=0; Nests with 2 Chicks=0
262 A39 29/12/2012 217 Nest count comments: Nests with 1 Chick=2; Nests with 1 Egg+1 Chick=2; Nests with 2 Chicks=2
263 A1 + A60 23/12/2013 1269 Nest count comments: Nests with 1 chick & 1 egg = 28; Nests with 1 chick = 5; Nests with 2 chicks=16; Chick count comments: 2 chicks and 1 egg = 3 nests
264 A2 23/12/2013 441 Nest count comments: Nests with 1 chick & 1 egg = 15; Nests with 1 chick = 14; Nests with 2 chicks=24
265 A3 23/12/2013 196 Nest count comments: Nests with 1 chick & 1 egg = 8; Nests with 1 chick = 1; Nests with 2 chicks=8
266 A4 23/12/2013 100 Nest count comments: Nests with 1 chick & 1 egg = 10; Nests with 1 chick = 6; Nests with 2 chicks=7
267 A64 23/12/2013 9 NA
268 A39 24/12/2013 374 Nest count comments: Nests with 1 chick; Nests with 1 egg = 22 nests; Nests with 2 chicks = 18 nests; Nests with 1 chick = 23 nests
269 A1 + A60 22/12/2014 1546 Nest count comments: Nests with 1 egg & 1 chick=70; Nests with 1 chick=17; Nests with 2 chicks=75
270 A2 22/12/2014 514 Nest count comments: Nests with 1 egg & 1 chick=14; Nests with 1 chick=8; Nests with 2 chicks=10
271 A3 22/12/2014 248 Nest count comments: Nests with 1 egg & 1 chick=9; Nests with 1 chick=1; Nests with 2 chicks=3
272 A4 22/12/2014 178 Nest count comments: Nests with 1 egg & 1 chick=; Nests with 2 chicks=6
273 A64 22/12/2014 12 Nest count comments: Nests with 1 egg & 1 chick=1
274 A39 24/12/2014 445 Nest count comments: Nests with 1 egg & 1 chick=12; Nests with 1 chick=4; Nests with 2 chicks=13
275 A1 + A60 23/12/2015 1459 NA
276 A2 23/12/2015 396 NA
277 A3 23/12/2015 117 NA
278 A4 23/12/2015 51 Nest count comments: Colony still very icy
279 A64 23/12/2015 4 NA
280 A39 24/12/2015 372 NA
281 A1 + A60 27/12/2016 499 NA
282 A2 27/12/2016 104 NA
283 A3 27/12/2016 64 Fledgling comments: plus two birds incubating eggs
284 A4 27/12/2016 46 NA
285 A64 27/12/2016 0 NA
286 A39 26/12/2016 92 NA
287 A1 + A60 19/12/2017 979 NA
288 A2 19/12/2017 216 NA
289 A3 19/12/2017 133 NA
290 A4 19/12/2017 68 NA
291 A64 19/12/2017 0 NA
292 A39 19/12/2017 166 NA
293 A39 18/12/2018 191 NA
294 A64 17/12/2018 0 NA
295 A4 17/12/2018 101 NA
296 A3 17/12/2018 176 NA
297 A1 + A60 17/12/2018 1083 NA
298 A2 17/12/2018 164 NA
299 A1 + A60 18/12/2019 1197 Chick count comments: One nest has acquired an extra chick from somehwhere! Fledgling count comments: counted from photo
300 A2 18/12/2019 151 NA
301 A3 18/12/2019 193 NA
302 A4 18/12/2019 96 NA
303 A64 18/12/2019 0 Fledgling comments: colony abandoned
304 A39 20/12/2019 280 NA
305 A1 + A60 NA 0 No nest or chick counts due to late opening of base; Fledgling count from a photo
306 A2 NA 0 No nest or chick counts due to late opening of base
307 A3 NA 0 No nest or chick counts due to late opening of base
308 A39 NA 0 No nest or chick counts due to late opening of base
309 A4 NA 0 No nest or chick counts due to late opening of base
310 A64 NA 0 No nest or chick counts due to late opening of base