Research Data

Transects for Dugong Aerial Survey, Shark Bay, 2007


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Transects for Dugong Aerial Survey, Shark Bay, 2007
Date Record Created
Date Record Modified
Date Coverage
2007-01-01 to 2008-01-01
Time Period
(no information)
Geospatial Location
  • Shark Bay, Western Australia, Australia.
  1. Type: brief

    Transects used for Dugong Aerial Surveys in Shark Bay region in 2007.

  2. Type: full

    Strip-transect aerial surveys of Shark Bay, Ningaloo Reef and Exmouth Gulf were conducted during the winters of 1989 and 1994. These surveys were designed primarily to estimate the abundance and distribution of dugongs, although they also allowed sea turtles and dolphins, and, to a lesser extent, whales, manta rays and whale sharks to be surveyed. Shark Bay contains a large population of dugongs that is of international significance. Estimates of approximately 10000 dugongs resulted from both surveys. The density of dugongs is the highest recorded in Australia and the Middle East, where these surveys have been conducted. Exmouth Gulf and Ningaloo Reef are also important dugong habitats, each supporting in the order of 1000 dugongs. The estimated number of turtles in Shark Bay is comparable to the number in Exmouth Gulf plus Ningaloo Reef (7000-9000). The density of turtles in Ningaloo Reef and, to a lesser extent, Exmouth Gulf is exceptionally high compared with most other areas that have been surveyed by the same technique. Shark Bay supports a substantial population of bottlenose dolphins (2000-3000 minimum estimate). Exmouth Gulf and Ningaloo Reef were not significant habitats for dolphins during the winter surveys. Substantial numbers of whales (primarily humpbacks) and manta rays occur in northern and western Shark Bay in winter. Ningaloo Reef is an important area for whale sharks and manta rays in autumn and winter. The Shark Bay Marine Park excludes much of the winter habitats of the large vertebrate fauna of Shark Bay. In 1989 and 1994, more than half of all the dugongs were seen outside the Marine Park (57.4 and 50.7%, respectively). Approximately one-third to one-half of turtles and dolphins were seen outside the Marine Park (in 1989 and 1994 respectively: turtles, 43 and 27%; dolphins, 47 and 32%). Almost all the whales and most of the manta rays were seen outside the Marine Park. Expansion of the Shark Bay Marine Park, to bring it into alignment with the marine section of the Shark Bay World Heritage Area, would facilitate the appropriate management of these populations. This would also simplify the State-Commonwealth collaboration necessary to meet the obligations of World Heritage listing. The coastal waters of Western Australia north of the surveyed area (over 6000 km of coastline) are relatively poorly known and surveys of their marine megafauna are required for wise planning and management.

  3. Type: note

    Funding for these surveys was obtained from the following government agencies: - Great Barrier Reef Marine Park Authority (GBRMPA), - Department of Environment and Resource Management (DERM), - Australian Marine Mammal Centre (AMMC), - Torres Strait Regional Authority (TSRA), - Australian Fisheries Management Authority (AFMA), - Marine and Tropical Sciences Research Facility (MTSRF), - National Environmental Research Program (NERP).

  4. Type: note

    This dataset consists of a transect map (jpg).

  5. Type: note

    Please contact Helene Marsh for GIS data.

Related Publications
  1. Distribution and Abundance of Dugongs, Turtles, Dolphins and other Megafauna in Shark Bay, Ningaloo Reef and Exmouth Gulf, Western Australia
  2. Interactions between dugongs and seagrasses in a subtropical environment
Related Websites
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Related Data
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Related Services
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Technical metadata
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  1. Managed by: Dr Alana Grech , School of Marine & Tropical Biology (6620)
  2. Aggregated by: Prof Helene Marsh , Discipline of Environmental Sciences & Geography (6632)
Primary Contact
Dr Alana Grech,
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Fields of Research
  1. 050206 - Environmental Monitoring (050206) (050206)
  2. 050202 - Conservation and Biodiversity (050202) (050202)
Socio-Economic Objective
  1. 960902 - Coastal and Estuarine Land Management (960902) (960902)
  1. aerial survey
  2. dugong dugon
  3. distribution
  4. ARC Centre of Excellence for Coral Reef Studies
Research Activity
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Research Themes
Tropical Ecosystems, Conservation and Climate Change
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License - Other
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Access Rights/Conditions
Open Access . If the data is not available via the provided link, please contact an associated party (preferrably the Manager as specified) for access.
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Data Location
Online Locations
  1. Transects for Dugong Aerial Survey, Shark Bay, 2007, (Data File, Public)
Stored At
Dr Alana Grech ARC Centre of Excellence for Coral Reef Studies James Cook University Townsville QLD 4811 Australia Tel: +61 7 47815222
Marsh, Helene.; Grech, Alana. (2012). Transects for Dugong Aerial Survey, Shark Bay, 2007. James Cook University. (dataset).