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Supplementary Material used to characterise the spatial and temporal dynamics of magpie goose populations in the Kakadu Region NT and their cultural harvesting values
Summarises all available aerial survey data and metadata used to characterise the long-term distribution and abundance of magpie geese in the Northern Territory undertaken by different institutions and publically available in several journals (Appendix A). Summarised also are results from a PhD study (E. Ligtermoet) documenting the cultural harvest... moreing values of magpie geese ascertained by interviews with Kakadu Traditional Owners (2011-2015). less
Cultural Studies not elsewhere classified
Ecology not elsewhere classified
Wildlife and Habitat Management
Kakadu National Park
Tropical floodplain ecology
Aboriginal cultural values
Historical aerial survey data of magpie geese and their nests in the Kakadu Region (1981-2006) of the NT are used to characterise their seasonal use of floodplains in order to identify abundance “hotspots” for future site-specific management purposes. Decadal trends in abundance (1958-2000) were examined also in relation to trends in rainfall and global-scale interactions between the ENSO and PDO climate indices. Customary harvesting practices of magpie geese and their eggs were ascertained from interviews of Kakadu Traditional Owners as part of a PhD study (2011-2016) in help manage future threats in a socio-ecological context.
The data collection here comprise the Supplementary Material for the publication:
Bayliss, P., and Ligtermoet, E. (2016 in press). Seasonal habitats, decadal trends in abundance and cultural values of magpie geese (Anseranus semipalmata) on coastal floodplains in the Kakadu Region, Northern Australia. Journal of Marine and Freshwater Research. Published online. Kakadu Special Issue.
Appendix A: Magpie goose aerial survey metadata and data used in spatial and temporal analyses.
Table A1. Metadata for aerial surveys of magpie geese and their nests in the Kakadu Region (1981‐2003).
Table A2. Indirect cross calibration of population estimates of magpie geese derived by Tulloch and McKean (1983) with those derived by Morton et al. (1990) and the NT Parks and Wildlife Commission (Bayliss and Yeomans 1990a; NTPWC 2003; Delaney et al. 2009) in the Kakadu Region.
Table A3. Estimates of magpie geese population size in the Western ‘Top End’ of the Northern Territory, source of data and corrections applied to standardise data between the Tulloch and McKean (1983) time series (1958-1980) and subsequent surveys conducted by the NT Parks and Wildlife Commission (1983-1999).
Appendix B: Cultural harvesting values of magpie geese in the Kakadu Region.
Table B1. Respondent comments illustrating the diverse attributions of causality to changes in magpie goose abundance (data from E. Ligtermoet PhD thesis submitted).
All population data are in the public domain (published papers and reports as referenced). Data were acquired in the Oceans and Atmosphere Business Unit, Coastal Development and Management Program. Data in Appendix B are from a PhD study by E. Ligtermoet (co-author on the above paper) and submitted here as her contribution to the paper. Both authors have signed a licence to publish with the Journal of Marine and Freshwater Research.
Emma Ligtermoet (Australian National University)
CSIRO Data Licence
Australian Government Department of Environment (Australia), Australian National University (Australia), CSIRO (Australia)
Bayliss, Peter; Ligtermoet, Emma (2016): Supplementary Material used to characterise the spatial and temporal dynamics of magpie goose populations in the Kakadu Region NT and their cultural harvesting values. v3. CSIRO. Data Collection.
All Rights (including copyright) CSIRO 2016.
The metadata and files (if any) are available to the public.
The salt lakes and swamps of Rottnest Island were surveyed by two observers, who between them walked round all the lakes and swamps (see figure of lakes and swamps below), with the exception of Barker Swamp, in the centre of the island. All birds, except Silver Gulls, seen around or on the lakes and swamps were identified and counted.
The coastal s... moreurveys was conducted by one observer who drove round the island, stopping at 32 vantage points (see figure of observation locations below), from which observations were made with the aid of a telescope on a tripod and binoculars. All birds (with the exception of Silver Gulls) were identified and counted. Any species seen that were not initially identified were approached to identify them.
Three complete surveys of birds of the coast were conducted between 24-27 September 1982, 21-23 September 1992 and 3-4 September 2007 by the same observer. These surveys commenced at the main jetty on Thomson Bay and involved walking anti-clockwise around the island; a distance of 37km. All beaches and cliff faces were traversed and the observer walked as close to the cliff edges as safety permitted. Counts were made of all non-terrestrial birds, with the exception of Silver Gull.