Abstract:
This dataset contains data on the habitats, distribution and numbers of Adélie Penguins (Pygoscellis adeliae) in the Mawson area, Antarctica during 1981 and 1988. The data are obtained from aerial photographs obtained at various times, during the 1981-82 and 1988-89 seasons. The results are listed in the documentation. Comparisons are made with census data collected in the 1971-72 summer.
Data from this record has been incorporated into the State of Environment Reporting System. See the url below for details. It also falls under ASAC project 1219 (ASAC_1219).
Quality
The data provides a complete survey over the Mawson and Rookery Island areas. The aerial surveys have provided a precise estimate of population sizes. It isintended that the survey be repeated every 3 to 5 years. Aerial photography was taken during the 1981-82 and 1988-89 seasons. During the 1981-82 season, photographs were taken on 14 January 1982, using a Kodak Tri-X 400 ASA black and white film ... in a bulk-loaded 35mm Nikon camera, from a helicopter flying at 300m. The 1988-89 photography was taken on 20 December 1988 using a Linhoff Aerotronica 70mm camera with a 120mm lens, from a helicopter flying at 500m. One roll (30m)of Kodak Tri-X was used. From the photographs, exact counts of adults present were made, including non-breeders and partners of incubating and brooding birds. These were transformed from counts of adults to an estimate of the nests established at the start of each season, using weekly census data from monitored colonies. Maps show the locations of colonies, and the results of these and any previous censuses. As no evidence to the contrary has beenestablished, it is concluded that this dataset is logically consistent.
Access Constraints
To be arranged with custodian. These data have been incorporated into the State of Environment database. See the url given below.
