Mean hatching date of Chinstrap and Adelie penguins at Signy Island 1996 - 2016

100 nests in designated Adelie and Chinstrap penguin colonies are marked and then regularly monitored. Data are collected on when eggs are laid in each nest, when they hatch, when eggs or chicks are lost, and when chicks become unguarded. Data exist from 1996 onwards. For Adelie penguins, 100 nests in a colony designated A41 was monitored between 1996 and 2002, from 2003 onwards 100 nests in a colony designated A39 were monitored. For Chinstrap penguins, 100 nests in a colony designated A69 were monitored between 1996 and 2015, from 2016 onwards, 100 nests in a colony designated C66 were monitored. No data were collected in the 1997-98, 1999-2000 and 2010-2011 seasons.

To calculate the annual hatching date a binomial model was fitted using the proportion of nests containing one or more chicks as the response variable and the date in days after 1 Oct as the explanatory variable. This model was fitted for each species and year separately. The dose.p function in the MASS package in R was used to derive the day when 50% of nests contained one or more chicks to produce the mean hatching date for each species-year combination. Mean laying dates were back-calculated from the mean hatching dates by subtracting the average incubation periods for each species (35 days for Adelies and 36.4 days for chinstraps, which are relatively constant between years). This has been calculated for data from 1996 to 2016.

Simple

Alternate title

Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01109
Date (Publication)
2020-01-29
Citation identifier
http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01109
Point of contact
Organisation name Individual name Electronic mail address Role

British Antarctic Survey

pdc@bas.ac.uk

Custodian

Polar Data Centre, Natural Environment Research Council, UK Research & Innovation

Clewlow, H.

pdc@bas.ac.uk

Originator
Maintenance and update frequency
Unknown
Keywords

  • NDGO0001

NERC OAI Harvesting

  • NERC_DDC

GCMD Parameter Valids

  • EARTH SCIENCE > Biosphere > Ecological Dynamics

BAS Free-text keywords

  • Adelie penguin

  • Chinstrap penguin

  • Signy Island

  • breeding success

  • chronology
Use limitation

NERC-funded data supplied under OGL v.3: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/

Access constraints
Other restrictions
Other constraints

NERC-funded data supplied under OGL v.3: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/

Language
English
Topic category
  • Biota
N
S
E
W
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Begin date
1996-11-06
End date
2016-01-12
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
    Distributor contact
    Organisation name Individual name Electronic mail address Role

    Polar Data Centre - British Antarctic Survey

    pdc@bas.ac.uk

    		Distributor
    OnLine resource
    Protocol Linkage Name

    http

    GET DATA
    Hierarchy level
    Dataset

    Domain consistency

    Measure identification
    INSPIRE / Conformity_001

    Conformance result

    Title

    INSPIRE Data Specification on unknown theme Guidelines
    Date
    Explanation

    See the referenced specification
    Pass
    No
    Statement

    No special comments

    Metadata

    File identifier
    GB_NERC_BAS_PDC_01109 XML
    Metadata language
    English
    Hierarchy level
    Dataset
    Date stamp
    2020-01-29
    Metadata standard name

    NERC profile of ISO19115:2003
    Metadata standard version

    1.0
    Metadata author
    Organisation name Individual name Electronic mail address Role

    British Antarctic Survey

    pdc@bas.ac.uk

    		Point of contact
    Dataset URI

    http://www.antarctica.ac.uk/dms/metadata.php?id=GB/NERC/BAS/PDC/01109

     
     

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    Spatial extent

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    Keywords



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