Data

Dugong aerial survey (dugongs, turtles) Southern Great Barrier Reef, 1986

James Cook University
Grech, Alana ; Marsh, Helene
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://researchdata.jcu.edu.au//published/e8772fdf23947d51cf4caf5865db581d&rft.title=Dugong aerial survey (dugongs, turtles) Southern Great Barrier Reef, 1986&rft.identifier=https://researchdata.jcu.edu.au//published/e8772fdf23947d51cf4caf5865db581d&rft.publisher=James Cook University&rft.description=In 1985, dugongs were censused from the air at an overall sampling intensity of 10.9% over an area of 5480 km2 within the inshore areas of the northern third of the Central Section of the Great Barrier Reef Marine Park and adjacent waters of Queensland, and at an overall intensity of 10.7% over a corresponding area of 15091 km2 in the Capricorn Section of the Park. Sightings were corrected for perceptual bias (the proportion of animals visible in the transect which were missed by observers), and availability bias (the proportion of animals that were invisible due to water turbidity) using survey-specific correction factors. The resultant population estimate for the northern half of the Central Section was 1024 ± 192 dugongs at an overall density of 0.19 ± 0.04 km-2, a precision of 19%. The population estimate for the Capricorn Section was 2144 ± 428 dugongs at an overall density of 0.14 ± 0.03 km-2, a precision of 20%. The highest densities of animals were seen on coastal seagrass beds in water depths of less than 5 m. Maps of density and distribution are given.Sightings for dugongs and sea turtles in the Southern Great Barrier Reef area during the dugong aerials surveys in September 1986.&rft.creator=Grech, Alana &rft.creator=Marsh, Helene &rft.date=2012&rft.coverage=146.0067,-17.9986 147.0134,-17.9986 147.0134,-19.2918 146.0067,-19.2918 146.0067,-17.9986&rft.coverage=Southern Great Barrier Reef, Queensland, Australia. Central and Capricorn sections of the Great Barrier Reef.&rft_rights=&rft_subject=marine turtle&rft_subject=great barrier reef&rft_subject=marine biology&rft_subject=distribution&rft_subject=aerial survey&rft_subject=abundance&rft_subject=dugong&rft_subject=dugong dugon&rft_subject=marine mammal&rft_subject=ARC Centre of Excellence for Coral Reef Studies&rft.type=dataset&rft.language=English Access the data
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Brief description

Sightings for dugongs and sea turtles in the Southern Great Barrier Reef area during the dugong aerials surveys in September 1986.

Full description

In 1985, dugongs were censused from the air at an overall sampling intensity of 10.9% over an area of 5480 km2 within the inshore areas of the northern third of the Central Section of the Great Barrier Reef Marine Park and adjacent waters of Queensland, and at an overall intensity of 10.7% over a corresponding area of 15091 km2 in the Capricorn Section of the Park. Sightings were corrected for perceptual bias (the proportion of animals visible in the transect which were missed by observers), and availability bias (the proportion of animals that were invisible due to water turbidity) using survey-specific correction factors. The resultant population estimate for the northern half of the Central Section was 1024 ± 192 dugongs at an overall density of 0.19 ± 0.04 km-2, a precision of 19%. The population estimate for the Capricorn Section was 2144 ± 428 dugongs at an overall density of 0.14 ± 0.03 km-2, a precision of 20%. The highest densities of animals were seen on coastal seagrass beds in water depths of less than 5 m. Maps of density and distribution are given.

Notes

Please contact Helene Marsh [email protected] for GIS data. 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).

Created: 2012-01-24

Data time period: 09 1986 to 30 11 1986

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146.0067,-17.9986 147.0134,-17.9986 147.0134,-19.2918 146.0067,-19.2918 146.0067,-17.9986

146.51005,-18.6452

text: Southern Great Barrier Reef, Queensland, Australia. Central and Capricorn sections of the Great Barrier Reef.

Subjects
ARC Centre of Excellence for Coral Reef Studies | abundance | aerial survey | distribution | dugong | dugong dugon | great barrier reef | marine biology | marine mammal | marine turtle |

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Identifiers
  • Local : researchdata.jcu.edu.au//published/e8772fdf23947d51cf4caf5865db581d
  • Local : jcu.edu.au/tdh/collection/ef45fe84-a648-4f4c-b75f-9346b1335c0b
  • Local : c1577e13cbc5ea46bfb99b838876dfba
ACN 633 798 857