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Surface scars on massive corals as evidence of previous crown-of-thorns starfish (Acanthaster planci) outbreaks on the Great Barrier Reef

Australian Institute of Marine Science
Australian Institute of Marine Science (AIMS) (Distributor, Point of Contact, Custodian)
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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=http://data.aims.gov.au/metadataviewer/faces/view.xhtml?uuid=b89a9312-cc2a-4221-bc26-0c378591fc61&rft.title=Surface scars on massive corals as evidence of previous crown-of-thorns starfish (Acanthaster planci) outbreaks on the Great Barrier Reef&rft.identifier=http://data.aims.gov.au/metadataviewer/faces/view.xhtml?uuid=b89a9312-cc2a-4221-bc26-0c378591fc61&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=In April 1985, massive corals on 5 mid-shelf reefs (Green Island, Feather Reef, John Brewer Reef, Rib Reef and Wheeler Reef) and 1 outer-shelf reef (Potter Reef) were surveyed for feeding scars caused by the crown-of thorns starfish (Acanthaster planci). Each reef, with the exception of Wheeler Reef, had experienced crown-of-thorns starfish outbreaks between 1962 and 1985. The survey involved 2 divers using SCUBA equipment swimming along randomly placed 200 m (approximately) sections of the reef perimeter. These swims were carried out in a slow meandering pattern covering as much of the reef slope as possible to a depth of approximately 12m. Various size classes of Diploastrea heliopora and a number of species of Porites were surveyed. Each individual colony encountered was recorded in 1 of 4 diameter categories and 1 of 4 proportional damage categories. The height difference between the scarred surface and the living surface was measured using a specially built PVC height gauge. Shallow cores (to 20 cm) were taken in the dead surfaces of some Porites colonies for the purpose of dating the dead surface. For each colony, measurements were made of total height, maximum diameter, the diameter perpendicular to the maximum diameter, and 5 independent measurements of the heights between adjacent 'steps', where a 'step' is the distance between adjacent dead or living and dead surfaces normal to the lower surface. The cores were bleached, sun dried and logged. The dead surfaces were then dated using a fluorescent banding technique.&rft.creator=Australian Institute of Marine Science (AIMS) &rft.date=1985&rft.relation=http://data.aims.gov.au/extpubs/do/viewPub.do?articleId=7685&rft.coverage=northlimit=-16.7; southlimit=-18.81; westlimit=145.9; eastLimit=147.55&rft.coverage=northlimit=-16.7; southlimit=-18.81; westlimit=145.9; eastLimit=147.55&rft_rights=All AIMS data, products and services are provided as is and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current.To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.&rft_rights=Ownership of all Intellectual Property Rights in the data remains with the Australian Institute of Marine Science (AIMS) and all use of the data must acknowledge AIMS.&rft_rights=All users of AIMS data must acknowledge the source of the material in the following manner: Data was sourced from the Australian Institute of Marine Science (AIMS).&rft_rights=Format for citation of data sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: Australian Institute of Marine Science. [year-of-data-download], [Title], [data-access-URL], accessed (date-of-access].&rft_rights=Use of the AIMS data is for not-for-profit applications only. All other users shall seek permission for use by contacting AIMS. Acknowledgements as prescribed must be clearly set out in the user's formal communications or publications.&rft_subject=Oceans&rft.type=dataset&rft.language=English Go to Data Providers

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All AIMS data, products and services are provided "as is" and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current.To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.

Ownership of all Intellectual Property Rights in the data remains with the Australian Institute of Marine Science (AIMS) and all use of the data must acknowledge AIMS.

All users of AIMS data must acknowledge the source of the material in the following manner: "Data was sourced from the Australian Institute of Marine Science (AIMS)."

Format for citation of data sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: "Australian Institute of Marine Science. [year-of-data-download], [Title], [data-access-URL], accessed (date-of-access]".

Use of the AIMS data is for not-for-profit applications only. All other users shall seek permission for use by contacting AIMS. Acknowledgements as prescribed must be clearly set out in the user's formal communications or publications.

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Brief description

In April 1985, massive corals on 5 mid-shelf reefs (Green Island, Feather Reef, John Brewer Reef, Rib Reef and Wheeler Reef) and 1 outer-shelf reef (Potter Reef) were surveyed for feeding scars caused by the crown-of thorns starfish (Acanthaster planci). Each reef, with the exception of Wheeler Reef, had experienced crown-of-thorns starfish outbreaks between 1962 and 1985.

The survey involved 2 divers using SCUBA equipment swimming along randomly placed 200 m (approximately) sections of the reef perimeter. These swims were carried out in a slow meandering pattern covering as much of the reef slope as possible to a depth of approximately 12m. Various size classes of Diploastrea heliopora and a number of species of Porites were surveyed. Each individual colony encountered was recorded in 1 of 4 diameter categories and 1 of 4 proportional damage categories. The height difference between the scarred surface and the living surface was measured using a specially built PVC height gauge.

Shallow cores (to 20 cm) were taken in the dead surfaces of some Porites colonies for the purpose of dating the dead surface. For each colony, measurements were made of total height, maximum diameter, the diameter perpendicular to the maximum diameter, and 5 independent measurements of the heights between adjacent 'steps', where a 'step' is the distance between adjacent dead or living and dead surfaces normal to the lower surface. The cores were bleached, sun dried and logged. The dead surfaces were then dated using a fluorescent banding technique.

Notes

This study set out to examine the feasibility of eliciting reliable data on previous crown-of-thorns (Acanthaster planci) aggregations by dating surface scars on massive corals. The objectives of the surveys were to assess the level of damage caused by the most recent Acanthaster planci outbreaks on various size classes of Porites and Diploastrea, and to locate suitable specimens for detailed measurement and dating of scars.
Done, TJ: AIMS (Manager - Massive Coral Study)
COT - CCEP Team
Isdale, PJ: AIMS

Created: 19850410

Data time period: 04 1985 to 04 1985

147.55,-16.7 147.55,-18.81 145.9,-18.81 145.9,-16.7 147.55,-16.7

146.725,-17.755

text: northlimit=-16.7; southlimit=-18.81; westlimit=145.9; eastLimit=147.55

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