BGS Hosted Metadata
Annual samples and measurements of diet composition of Adelie penguins at Signy Island, from 1997 to 2020.
This dataset captures information on the diet composition and mass of Adelie penguin stomach contents at Signy Island, from 1997 to 2020. The monitoring period occurred over four weeks each year and involved sampling adults returning to feed their chicks during the creche period. Sampling took place approximately every five days. Numbers of birds sampled on each occasion varied over the entire period of the dataset from a maximum of eight to a minimum of six, equating to an annual maximum of forty birds and an annual minimum of thirty, depending on the year. All adult penguins were sampled on their return to the colony using the stomach lavage methodology specified in CCAMLR (Commission for the Conservation of Antarctic Marine Living Resources) Ecosystem Monitoring Program (CEMP) Standard Methods A8A. The stomach samples were then weighed and categorised into krill, cephalopods, fish and non-food and identified to species level where possible. Krill carapaces and otoliths were removed and measured.
Ecosystems component of BAS Polar Science for Planet Earth Programme, funded by NERC.
Simple
- Date (Creation)
- 2021-08-23
- Date (Revision)
- 2021-08-23
- Date (Publication)
- 2021-08-23
- Date (released)
- 2021-08-23
- Edition
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1.0
- Unique resource identifier
- https://doi.org/10.5285/eb421e6d-b93b-4174-904b-9a7b0b401403
- Codespace
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doi
- Unique resource identifier
- GB/NERC/BAS/PDC/01549
- Codespace
- Other citation details
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Please cite this item as: Dunn, M., Waluda, C., Adlard, S., Lynnes, A., Morley, T., & Fox, D. (2022). Annual samples and measurements of diet composition of Adelie penguins at Signy Island, from 1997 to 2020. (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/eb421e6d-b93b-4174-904b-9a7b0b401403
- Credit
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No credit.
- Status
- Completed
- Point of contact
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Organisation name Individual name Electronic mail address Role British Antarctic Survey Dunn, Michael J Author British Antarctic Survey Waluda, Claire Author British Antarctic Survey Adlard, Stacey
Author International Association of Antarctic Tour Operators
Lynnes, Amanda Author University of Aberdeen Morley, Tim
Author Royal Society for the Protection of Birds Fox, Derren
Author NERC EDS UK Polar Data Centre Point of contact
- Maintenance and update frequency
- As needed
- Maintenance note
- Completed
- Theme
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Adelie penguin
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Antarctic krill
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Diet
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Euphausia superba
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Pygoscelis adeliae
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- Place
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Signy Island South Orkney Islands
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GEMET - INSPIRE themes, version 1.0
- 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
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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
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This data is governed by the NERC data policy and supplied under Open Government Licence v.3
- Use constraints
- Other restrictions
- Other constraints
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No restrictions apply.
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- Cross reference
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- Cross reference
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- Larger work citation
- Unique resource identifier
- url
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url
- Association Type
- Cross reference
- Unique resource identifier
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url
- Association Type
- Cross reference
- Unique resource identifier
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url
- Association Type
- Cross reference
- Spatial representation type
- Text, table
- Language
- English
- Character set
- UTF8
- Topic category
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- Biota
)
- Begin date
- 1997-01-05
- End date
- 2020-01-18
- Supplemental Information
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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
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European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
- Date (Publication)
- 2008-11-12
- Cited responsible party
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Organisation name Individual name Electronic mail address Role European Petroleum Survey Group
Publisher
- Unique resource identifier
- urn:ogc:def:crs:EPSG::3031
- Version
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6.18.3
Distributor
- Distributor contact
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Distributor
- Distributor format
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Name Version text/csv
- Units of distribution
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bytes
- Transfer size
- 2747269
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=eb421e6d-b93b-4174-904b-9a7b0b401403 Get Data
- Hierarchy level
- Dataset
- Statement
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Methodology:
Diet samples were taken each year from approximately 30-40 Adelie penguins, over a four-week period during creche. Birds were captured when returning to feed their chicks and samples were obtained using the stomach lavage method (Wilson 1984; Williams 1991, CCAMLR CEMP Standard Method A8A). The contents were subsequently drained through two sieves (3.35 and 250 micrometres) and wet meal mass was recorded. Samples were then categorised into crustacean, fish and cephalopod components and weighed by category. Prey items were also further categorised by species, when possible. Fish otoliths and krill carapaces were separated and measured. Otolith characteristics were used to identify the fish species consumed.
Individual krill specimens all suffered varying degrees of damage prior to identification due to the process of consumption and partial digestion. The sex and age group of individual krill was determined by measuring the removed carapace length (RCL) using times 6 magnification under a binocular microscope and identifying specific diagnostics. Measurements were to the nearest eyepiece unit. Maturity stages were determined using the measured removed carapace length (RCL) per the code index from Morris et al. 1988, and are included as a csv file (signy_krill_maturity_stages_code.csv) with the data.
For a full explanation of the methodology used see Hill HJ. 1990; Polar Biol, 10(4):317-20; Reid K. 1998; Polar Biol, 19(2):145-147, CCAMLR CEMP Standard Method A8A.
For reference to the code index in Morris et al. 1988, see Morris, D.J., J.L. Watkins, C. Ricketts, F. Buchholz and J. Priddle. 1988. An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba. British Antarctic Survey Bulletin, 79: 27-50.
For otolith measurements, the microscope was first set to an appropriate magnification - allowing otoliths to fit onto one measurement scale. The magnification was then checked using the stage micrometer and adjusted when necessary. Otolith lengths were then measured using the measuring scale in the microscope eye piece. Depending on the species of fish the length measurement was taken in slightly different places.
Data quality:
N/A
Metadata
- File identifier
- eb421e6d-b93b-4174-904b-9a7b0b401403 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2021-08-23
- Metadata standard name
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ISO 19115 Geographic Information - Metadata
- Metadata standard version
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ISO 19115:2003(E)
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Point of contact
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