[Location: Location_Category='OCEAN', Location_Type='SOUTHERN OCEAN', Detailed_Location='Heard Island']
King Penguin breeding population at Heard Island.Entry ID: SOE_seabird_candidate_sp_KP
Abstract: INDICATOR DEFINITION
The size of the breeding population of King Penguins at Heard Island.
TYPE OF INDICATOR
There are three types of indicators used in this report:
1. Describes the CONDITION of important elements of a system;
2. Show the extent of the major PRESSURES exerted on a system;
3. Determine RESPONSES to either condition or changes in the condition of a system.
This indicator is ... one of: CONDITION
RATIONALE FOR INDICATOR SELECTION
The breeding population of King Penguins is related to resource availability (nesting space and food), behavioural mechanisms (immigration/emigration and breeding effort/success) in addition to climate change and human impacts such as fisheries. Monitoring breeding population and interpretation of the data provides information on changes in the Subantarctic ecosystem.
DESIGN AND STRATEGY FOR INDICATOR MONITORING PROGRAM
Spatial scale: Heard Island (lat 53 deg 06' 00.0& S, long 73 deg 31' 59.9& E).
Frequency: 2-3 years. Access to remote colonies and other logistical constraints do not permit annual visits.
Measurement technique: Each colony is visited and individual birds are counted from the ground by two or three personnel performing replicate counts. Further counts are obtained by oblique ground and aerial photography. All breeding individuals in a colony are counted. Considerations regarding disturbance associated with census visits are also incorporated into monitoring strategies. The lack of annual census data does not reduce the value of these long-term monitoring programmes.
The king penguin breeding population at Heard Island has increased at almost 20% per year since the late 1940s; other king penguin populations throughout the Southern Ocean have also increased, but not as rapidly. At present, there is no alternative hypothesis to that previously proposed, that these population increases are sustained by the enhanced availability of myctophids, the principal prey of king penguins (Woehler et al. 2001).
LINKS TO OTHER INDICATORS
(Click for Interactive Map)
Start Date: 1947-12-01
Temporal Resolution: 1 year
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > PENGUINS
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SPECIES LIFE HISTORY
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > RANGE CHANGES
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > COMMUNITY STRUCTURE
Quality Censuses of breeding adults are performed and long term trends are determined. Integration with other long term datasets is currently underway through international collaborations, allowing comparison among sites at regional and ecosystem scales. Some analyses and their interpretations have been published (see references), and current analyses will examine population data as they are compiled.
Access Constraints Some data are published, others are in press and/or under analyses. Contact data compiler for access and use (Dr Eric J Woehler, AAD).
Use Constraints This data set conforms to the PICCCBY Attribution License
Some data are published, others are in press and/or under analyses. Contact data compiler for access and use (Dr Eric J Woehler, AAD).
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Role: DATA CENTER CONTACT
Email: eric.woehler at gmail.com
Province or State: Tasmania
Postal Code: 7001
Woehler, E.J. 1991. Status and conservation of the seabirds of Heard Island and the McDonald Islands. In: Seabird status and conservation: a supplement. Croxall, J.P. (ed.), ICBP Technical Publication 11, 263-277.
Woehler, E.J., Cooper, J., Croxall, J.P., Fraser, W.R., Kooyman, G.L., Miller, G.D., Nel, D.C., Patterson, D.L., Peter, H.-U., Ribic, C.A., Salwicka, K. Trivelpiece, W.Z. and Weimerskirch, H. (2001). A statistical assessment of the status and trends of Antarctic and Subantarctic seabirds. SCAR/NSF/CCAMLR, 43pp.
Creation and Review Dates
DIF Creation Date: 2001-05-16
Last DIF Revision Date: 2008-04-10
Future DIF Review Date: 2002-01-31