Data

Abundance estimates of sea urchins and a suite of predators over multiple spatial scales.

Australian Ocean Data Network
Pederson, Hugh, Dr ; Johnson, Craig, Prof.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=892e1d90-68d0-11dd-a210-00188b4c0af8&rft.title=Abundance estimates of sea urchins and a suite of predators over multiple spatial scales.&rft.identifier=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=892e1d90-68d0-11dd-a210-00188b4c0af8&rft.description=Underwater visual census surveys were conducted at 15 sites in eastern Tasmania to quantify the abundance of the sea urchin Heliocidaris erythrogramma and several putative predators.Maintenance and Update Frequency: notPlannedStatement: Data ranges from Bicheno to the Mercury Passage and the Derwent Estuary and incorporates three MPAs and adjacent reference sites. Sea urchin abundance and size structure were recorded in diver placed quadrats (16m^2) and predator abundance quantified on 10 x 50m belt transects at each site. Demersal fish were surveyed by recording the number of each species found within 5m either side of the transect. Decapod species Plagusia chabrus (red bait crab) and Jasus edwardsii (southern rock lobster) were counted in a 2m strip either side of the 50m transect. The abundance of lobsters were split further into three size classes.&rft.creator=Pederson, Hugh, Dr &rft.creator=Johnson, Craig, Prof. &rft.date=2008&rft.coverage=westlimit=147; southlimit=-43.5; eastlimit=148.5; northlimit=-41.5&rft.coverage=westlimit=147; southlimit=-43.5; eastlimit=148.5; northlimit=-41.5&rft.coverage=uplimit=10; downlimit=7&rft.coverage=uplimit=10; downlimit=7&rft_rights=The data described in this record are the intellectual property of H. Pederson.&rft_rights= http://creativecommons.org/licenses/by/2.5/au/&rft_rights=http://i.creativecommons.org/l/by/2.5/au/88x31.png&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Graphic&rft_rights=Creative Commons Attribution 2.5 Australia License&rft_rights=http://creativecommons.org/international/au/&rft_rights=WWW:LINK-1.0-http--related&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Text&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_rights=Please contact H. Pederson for access to the data.&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au&rft_subject=biota&rft_subject=Oceans | Marine Biology | Marine Invertebrates&rft_subject=Biosphere | Ecological Dynamics | Predation&rft_subject=25 247001&rft_subject=Heliocidaris erythrogramma&rft_subject=Marine and Estuarine Ecology (incl. Marine Ichthyology)&rft_subject=BIOLOGICAL SCIENCES&rft_subject=ECOLOGY&rft_subject=Abundance&rft_subject=Test diameter&rft.type=dataset&rft.language=English Access the data
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The data described in this record are the intellectual property of H. Pederson.

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Creative Commons Attribution 2.5 Australia License

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The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).

Please contact H. Pederson for access to the data.

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Brief description

Underwater visual census surveys were conducted at 15 sites in eastern Tasmania to quantify the abundance of the sea urchin Heliocidaris erythrogramma and several putative predators.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: Data ranges from Bicheno to the Mercury Passage and the Derwent Estuary and incorporates three MPAs and adjacent reference sites.

Sea urchin abundance and size structure were recorded in diver placed quadrats (16m^2) and predator abundance quantified on 10 x 50m belt transects at each site. Demersal fish were surveyed by recording the number of each species found within 5m either side of the transect. Decapod species Plagusia chabrus (red bait crab) and Jasus edwardsii (southern rock lobster) were counted in a 2m strip either side of the 50m transect. The abundance of lobsters were split further into three size classes.

Notes

Credit
Australian Research Council (ARC)
Purpose
Quantify patterns in sea urchins and predator abundance over several spatial scales for evidence of effects of predator control of sea urchin populations.

Created: 13 08 2008

Data time period: 02 1999 to 31 05 2000

This dataset is part of a larger collection

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148.5,-41.5 148.5,-43.5 147,-43.5 147,-41.5 148.5,-41.5

147.75,-42.5

text: westlimit=147; southlimit=-43.5; eastlimit=148.5; northlimit=-41.5

text: uplimit=10; downlimit=7

Subjects
25 247001 | Abundance | Biological Sciences | Biosphere | Ecological Dynamics | Predation | Ecology | Heliocidaris erythrogramma | Marine and Estuarine Ecology (Incl. Marine Ichthyology) | Oceans | Marine Biology | Marine Invertebrates | Test diameter | biota |

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  • global : 892e1d90-68d0-11dd-a210-00188b4c0af8
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