Population counts, resights and demography of Adelie Penguins in Mac. Robertson Land, Antarctica, 1991-2019

• Other Authors: AADC (owner), AADC, DATA OFFICER (distributor), AADC, DATA OFFICER (custodian), AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith), Australian Antarctic Data Centre (publisher), Australian Antarctic Division (sponsor), EMMERSON, LOUISE (collaborator), EMMERSON, LOUISE (hasPrincipalInvestigator), EMMERSON, LOUISE (author), Emmerson, L. and Southwell, C. (originator), SOUTHWELL, COLIN (collaborator), SOUTHWELL, COLIN (hasPrincipalInvestigator)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: oceans; biota; EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > PENGUINS; BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > POPULATION DYNAMICS; CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > BIOLOGICAL RECORDS > POPULATION ABUNDANCE; OCEANS > SEA ICE > SEA ICE CONCENTRATION; ADÉLIE PENGUIN; VISUAL OBSERVATIONS; FIELD SURVEYS; AMD/AU; CEOS; AMD; CONTINENT > ANTARCTICA; OCEAN > SOUTHERN OCEAN; ANTARCTICA > BÉCHERVAISE ISLAND; GEOGRAPHIC REGION > POLAR; Antarc*; Antarctic; Antarctica; Béchervaise Island; East Antarctica; Mac Robertson Land; Mac. Robertson Land; Sea ice; Southern Ocean
• Online Access: https://researchdata.edu.au/population-counts-resights-1991-2019/2822214

Progress Code: completed Statement: No problems were encountered with the dataset, the data quality are good. Some standardisation of data is required as per details outlined in manuscript to account for seabird phenology or methodology bias. We estimate population size in terms of the number of occupied nests for the Adélie penguin metapopulation in western Mac. Robertson Land, East Antarctica in 2009/10 and 2019/20. We also assessed demographic data from a single breeding site in the central part of this area (Béchervaise Island: 67°35'S, 62°49'E) including reproductive success, resight data, and fledgling mass from 1991/92 to 2019/20. We collated environmental covariates of potential drivers in this area over the same time period from sources described below. These are presented in the file “Time series demography and environmental covariates.xls”. Environmental covariates: Sea-ice concentration: Summer sea-ice concentration (SIC) was obtained for the area bounded by longitudes 60 - 65°E, to the south by the Antarctic coastline and the north by latitude 66.75°S. This approximately 250 km stretch of coastline incorporates the location of all Adélie penguin breeding sites across the metapopulation. The area defines the most northerly limit of fast-ice during chick rearing and encompasses the longitudinal range of the birds’ summer foraging activities. The sea-ice contained within this ‘near-shore’ region is predominantly composed of fast-ice (ice that is attached to land but covers seawater). Summer SIC was calculated as an average over the three-week period 25th December to 15th January when adults are guarding chicks for each breeding season. Winter SIC was determined in the following three areas of the penguins’ winter migratory route as defined previously. Each area was defined between specific longitudes and from 50°S south to the Antarctic coastline. The sea-ice contained within this area is composed of fast-ice near the coastline and pack-ice (all sea-ice that is not fast-ice) beyond the fast-ice ...