Dugong relative density and distribution

James Cook University

Dataset credit

Alana Grech and Helene Marsh, School of Earth and Environmental Sciences, James Cook University


Primary contact Alana Grech James Cook University
Data entry Ei Fujioka Duke University



Information collected from dugong aerial surveys in Australian waters conducted since the mid 1980's provide empirical data on patterns of dugong distribution and abundance. In conjunction with geostatistical techniques, including universal kriging, aerial survey information was used to develop a spatially-explict model of dugong relative density and distribution calculated at a grid size of 2km × 2km.


Spatially-explicit population models are an important component of species conservation management. The dugongs range is large, complex and dynamic and extends over multiple jurisdictions. Models of dugong relative density and distribution in Australian waters were developed to inform government agencies and other interested parties on the suitability of various managment regimes, including the design of area closures.

Supplemental information

Per request by the data provider, point observations are not included. Please contact the data provider if you wish to obtain them. Due to the lack of point observations, some features on the Dataset Detail are not available.

The model outputs (dugong density and conservation values) are downloadable. Switch to [Download] tab and click "Get this data as ESRI shapefile." They are in fact rasters. Refer to the reference for more detail.


Grech, A. and M. Helene. 2007. Prioritising areas for dugong conservation in a marine protected area using a spatially explicit population model. Applied GIS. Volume 3, Number 2.



Per request by the data provider, point observations are not included. Please contact the data provider if you wish to obtain them. The following column entries do not reflect the actual data structure.

Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.

Attributes in dataset

Attribute (table column)Description
obs_datedefinition not provided
obs_timedefinition not provided
latitudedefinition not provided
longitudedefinition not provided
speciesdefinition not provided
sp_tsndefinition not provided
obs_countdefinition not provided
geomdefinition not provided
oiddefinition not provided
Marine mammals1
Sea turtles0
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2008-11-11
Date, End2008-11-11
Temporal prec.111000
Latitude-28.50 - -8.10
Longitude134.50 - 153.10
Coord. prec.6 decimal digits
Data type
Traveled (km)0
Contr. through
Sharing policy CC-BY-NC (Minimum)
Shared with None
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics