10.5285/DAF2C4FD-C1E3-4E65-851F-D11F02C5B69D
Dunn, Michael J
Michael J
Dunn
0000-0003-4633-5466
British Antarctic Survey
Adlard, Stacey
Stacey
Adlard
British Antarctic Survey
Lynnes, Amanda
Amanda
Lynnes
0000-0002-6405-6658
International Association of Antarctic Tour Operators
Briggs, Dirk
Dirk
Briggs
British Antarctic Survey
Fox, Derren
Derren
Fox
Royal Society for the Protection of Birds
Morley, Tim
Tim
Morley
University of Aberdeen
Population size and breeding success of Adelie penguins on Signy Island from 1978 to 2020.
NERC EDS UK Polar Data Centre
2021
"EARTH SCIENCE","BIOSPHERE","ECOLOGICAL DYNAMICS","SPECIES/POPULATION INTERACTIONS","POPULATION DYNAMICS"
"EARTH SCIENCE","BIOSPHERE","ECOLOGICAL DYNAMICS","SPECIES/POPULATION INTERACTIONS","POST-BREEDING PERIODS"
"EARTH SCIENCE","BIOSPHERE","ECOLOGICAL DYNAMICS","SPECIES/POPULATION INTERACTIONS","SURVIVAL RATES"
Adelie penguin
Breeding success
Population size
Signy Island
Dunn, Michael J
Michael J
Dunn
0000-0003-4633-5466
British Antarctic Survey
Dunn, Michael J
Michael J
Dunn
0000-0003-4633-5466
British Antarctic Survey
Adlard, Stacey
Stacey
Adlard
British Antarctic Survey
Lynnes, Amanda
Amanda
Lynnes
0000-0002-6405-6658
International Association of Antarctic Tour Operators
Briggs, Dirk
Dirk
Briggs
British Antarctic Survey
Fox, Derren
Derren
Fox
Royal Society for the Protection of Birds
Morley, Tim
Tim
Morley
University of Aberdeen
UK Polar Data Centre
Natural Environment Research Council, UK Research & Innovation
UK Polar Data Centre
Natural Environment Research Council, UK Research & Innovation
UK Polar Data Centre
Natural Environment Research Council, UK Research & Innovation
1978-11-29/2021-01-16
2021-07-30
2021-07-30
2021-07-30
2021-12-02
en
Adelie penguin,Breeding success,Population size,Signy Island
https://www.bas.ac.uk/project/higher-predators-long-term-science/
https://www.ccamlr.org/en/document/science/cemp-standard-methods
2 files
45 KB
text/csv
1.0
Open Government Licence V3.0
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.
Adelie penguin colonies, predetermined as distinct groups of breeding pairs, were selected and surveyed using ground counts starting in the 1978 to 1997 season. In total, nine Adelie colonies were surveyed annually. Optimal count dates were determined by monitoring 100 Adelie nests in one, specifically-monitored colony for the species used to establish annual breeding chronology (CEMP Standard Method A9).
Monitoring comprised of counts of occupied nests and incubating nests for Adelie penguins. Nests were categorised as "incubating" (at least one egg present) and "occupied" (no eggs observed) either through manual nest marking, or observations from the colony edge using a tally counter. This was carried out one week after peak egg-laying (CEMP Standard Method A3A). Subsequently, chick counts were also carried out by manual nest marking, or if possible by observations from the colony edge. Lastly, fledgling counts were completed when all chicks had entered creche (CEMP Standard Method A6C). Counts were always individually repeated three times on the same day, until within 10 percent of each other. From the 2006/2007 season onwards, hand-held GPS devices were also used to provide specific coordinates of each surveyed colony.
An annual index of breeding population size is then calculated by determining the mean values of the number of occupied nests and incubating nests for several aggregated colonies. Breeding success can be calculated by taking the annual number of creched chicks prior to fledging, divided by the total number of breeding pairs.
Standard CCAMLR (CEMP) monitoring methods were implemented in 1996. Prior to this date, counting methods and timing of counts may have varied, which should be considered when comparing counts and calculating inter-annual trends from previous seasons.
For some seasons, only information on specific parameters was possible to obtain (when the base would open late/shut early). For NA values in the column titled "Total number of nests without eggs", which is carried out mid-season, some, if not all failed nests are abandoned by the time of the survey. Their stones are then stolen by other nesting birds, and the nests are no longer visible to field assistants. Abnormalities or the lack of data collected for other reasons is explained in the comments alongside that season's data.
More details on the counts can be provided upon request to the Polar Data Centre.
GPS coordinates are of colonies that were measured with GPS devices. There are colonies that are no longer present or monitored that do not have GPS coordinates.
Signy Island South Orkney Islands
-45.6
-60.7
Natural Environment Research Council, UK Research & Innovation
https://ror.org/02b5d8509
NE/R016038/1
National Capability - Polar Expertise Supporting UK Research