Date (Creation)

2020-01-23

Date (Revision)

2020-01-23

Date (Publication)

2020-01-23

Date (released)

2020-01-23

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/ca60bfec-9070-4967-920e-0c42554ad649

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01296

Codespace

https://data.bas.ac.uk/

Other citation details

Please cite this item as: Dunn, M. (2020). Counts of South Georgia shag Leucocarbo [atriceps] georgianus nests at Signy Island, South Orkney Islands, from 1947-2020 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/ca60bfec-9070-4967-920e-0c42554ad649

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Dunn, Michael		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Biosphere > Ecological Dynamics > Life History
• EARTH SCIENCE > Biosphere > Ecological Dynamics > Species Recruitment

Theme

• Colony count

• Phalacrocoracidae

• Population

• Signy Island

• South Georgia Shag

• South Orkney

Place

• Signy Island South Orkney Islands

GEMET - INSPIRE themes, version 1.0

• Habitats and biotopes

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

Use constraints

Other restrictions

Other constraints

This data is governed by the NERC data policy and supplied under Open Government Licence v.3

Use constraints

Other restrictions

Other constraints

None.

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

doi

Codespace

doi

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Biota

Begin date

1947-09-02

End date

2020-01-14

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

Observational data is collected as part of a long term population monitoring initiative carried out over multiple decades. The data is gathered following standard ground survey methods at the two South Georgia shag colony areas present on Signy Island: North Point and Shagnasty Island. South Georgia shag pair numbers and chick numbers are recorded at North Point, and pair numbers are recorded at Shagnasty Island. Data has been collected by a number of different observers, who are listed with the count data.

A minimum of two experienced observers survey each colony area at least twice on the same day. Surveys are repeated until the two count totals are within 10%. The mean count value is then calculated and presented. To count pair numbers, nests at which an adult appeared to be incubating (occupied nests) are counted. Nests are observed either peripherally (from edge areas of each colony), or from a nearby vantage point (30-50 m away, using binoculars).

At North Point, past counts varied where sometimes the number of adult birds were counted, and sometimes total number of nests. In earlier counts, the date of the count is not always known, and earlier counts were typically done earlier in the season than is standard now. Since 1997/98, all counts have been of nests. Since 1988/89, all nest counts were undertaken between 23rd November and 19th January.

Chick counts are also undertaken at the North Point colony. Some earlier chick counts report the number of chicks that were ringed and is therefore a minimum number of chicks, as the original report does not state whether all chicks were ringed. Notes with the data indicate what was counted, where it was possible to ascertain this information from the original report. Chick count dates vary year-on-year, and some may be a count of eggs that have hatched and others the chicks that have survived almost to fledging. Since 1996/97, chick counts have taken place between 6th January and 6th February to count chick survival to fledging, which occurs January - February each year. No chick counts have been undertaken at the Shagnasty colony, due to difficulties in accessing the colony.

This data has been collected by British Antarctic Survey (BAS) researchers as part of an on-going BAS long-term population monitoring programme to determine population size and breeding success trajectories.

Data quality:

Differences in the methods are specified under Comments in the data.

Metadata

File identifier

ca60bfec-9070-4967-920e-0c42554ad649 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2020-01-23

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact