TemperateReefBase Geonetwork Catalogue
Effect of Centrostephanus rodgersii barrens on standing stocks of abalone and rock-lobster in Tasmania
The effect of barrens formed by the long spined sea urchin, Centrostephanus rodgersii, on the standing stocks of southern rock lobsters (Jasus edwardsii) and black lip abalone (Haliotis rubra) was estimated by divers using underwater visual census methods to compare lobster and abalone abundance in barrens with that in adjacent kelp habitat.
Abalone (H. rubra) and rock-lobster (J. edwardsii) populations were compared on C. rodgersii barrens and in adjacent algal-dominated habitat at the same depth and on the same substratum type at three sites in eastern Tasmania (Elephant Rock:Binalong Bay, St Helens Is, and Mistaken Cape:Maria Island). At Elephant Rock and St Helens Island , the barrens are extensive and well established Type 1 barrens, while at Mistaken Cape the barrens in 8-14 m are incipient Type 4 barrens, comprising small barren patches in the algal bed (see FRDC report for classification of barren types). Note that while there are extensive barrens in deeper water (>18 m) at Mistaken Cape, at these depths working time is limited and it was difficult to locate intact macroalgal beds on equivalent substrata.
Simple
Identification info
- Date (Creation)
- 2008-04-15T10:15:00
Principal investigator
School of Zoology, University of Tasmania (UTAS) - Johnson, Craig, Prof.
Private Bag 5
Hobart
TAS
7000
Australia
- Purpose
- To determine the distribution of the long spined sea urchin (Centrostephanus rodgersii) on the east coast of Tasmania. To estimate the cover of C. rodgersii barrens on the east coast, and to compare the standing stocks of commercially harvested black lip abalone (Haliotis rubra) and southern rock lobster (Jasus edwardsii) in barrens habitat with that of adjacent seaweed beds.
- Credit
- Ross, Jeff, Dr
- Credit
- Ling, Scott
- Credit
- Funding: FRDC (Project No. 2001/044)
- Status
- Completed
Principal investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Johnson, Craig, Prof.
IMAS - Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
- Spatial representation type
- Text, table
- Topic category
-
- Biota
Extent
N
S
E
W
))
Temporal extent
- Time period
- 2002-01-19T00:00:00 2002-01-29T00:00:00
Vertical element
- Minimum value
- 8
- Maximum value
- 19
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Not planned
Resource format
- Title
- Microsoft Excel (xls)
- Date
- Edition
- 2003
- CAAB - Codes for Australian Aquatic Biota v2.
-
- 25 211001
- Centrostephanus rodgersii
- 25 247001
- Heliocidaris erythrogramma
- 28 820001
- Jasus edwardsii
- 24 038006
- Haliotis rubra
- 24 038004
- Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
- Keywords (Discipline)
-
- Temperate Reef
- Keywords (Theme)
-
- Coverage of urchin barren
- Coverage of algal species or guilds
- Coverage of substratum types
Resource constraints
- Classification
- Unclassified
Resource constraints
- Use limitation
- The data described in this record are the intellectual property of the University of Tasmania through the School of Zoology and the Tasmanian Aquaculture and Fisheries Institute
Resource constraints
- Linkage
-
http://i.creativecommons.org/l/by/4.0/88x31.png
License Graphic
- Title
- Creative Commons Attribution 4.0 International License
- Website
-
http://creativecommons.org/licenses/by/4.0/
License Text
- Other constraints
- 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).
Associated resource
- Title
- Surveys of the long spined sea urchin Centrostephanus rodgersii
- Date (Creation)
- 2011-08-31T00:00:00
- Language
- English
- Character encoding
- UTF8
- Environment description
- 2 datasheets (Microsoft Excel spreadsheets -xls): - the actual dive data (Barren_ kelpbed_ comparison_ dive_data _____FRDC_2001_044_a.xls); and - the key to list of species/substrate codes that are used (species_codes_FRDC_2001_044.xls).
- Supplemental Information
- References: Johnson, C., Ling, S., Ross, J., Shepherd, S. and Miller, K., 2005. Establishment of the long-spined sea urchin (Centrostephanus rodgersii) in Tasmania: First assessment of potential threats to fisheries. FRDC Final Report, Project No. 2001/044. University of Tasmania, Tasmanian Aquaculture and Fisheries Institute, School of Zoology. Smith, E. 2006. Establishment of the long-spined sea urchin - Centrostephanus rogersii. Fishing Today - Tasmanian Fishing Industry News, Volume 19, No. 1, Feb/March. http://www.dpiw.tas.gov.au/inter.nsf/Attachments/LBUN-6MV6CV?open
Content Information
- Content type
- Physical measurement
- Name
- Coverage of urchin barren
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPCT
- Name
- Percent
- Name
- Coverage of algal species or guilds
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPCT
- Name
- Percent
- Name
- Coverage of substratum types
- Identifier
- http://vocab.nerc.ac.uk/collection/P06/current/UPCT
- Name
- Percent
- Description
- abundance of invertebrates
Identifier
- Code
- Abundance of biota
- Description
- identification of of invertebrates
Identifier
Distribution Information
- Distribution format
-
- Microsoft Excel (xls)
Distributor
- OnLine resource
- DATA ACCESS V2 [original .xsl spreadsheet format]
- OnLine resource
-
imas:FR1_CRJohnson_Barren_kelpbed_comparison_rock_lobster_abalone_abundance_GV
MAP - survey sites for assessment of sea urchin grazing impacts
- OnLine resource
-
imas:FR1_CRJohnson_Barren_kelpbed_comparison_rock_lobster_abalone_abundance_GV
This OCG WFS service returns the data for download in subsettable CSV format.
Resource lineage
- Statement
- Sampling involved four 50 x 2 m belt transects set within the 15-18 m depth strata in each habitat type (barrens and algal-dominated) at each site. On each transect line, a pair of divers worked to 2 m each side of the line, and for each 5 m section of the transect recorded depth; percentage cover of substratum types; percentage cover C. rodgersii barrens habitat; abundance of sea urchins (C. rodgersii and H. erythrogramma), rock lobster (J. edwardsii) and abalone (H. rubra); and the percentage cover of algal species or guilds. Algal cover was estimated to the nearest 5 % for each 5 x 2 m section, while species occupying less than 5 % cover were recorded as being present. Divers classified habitat as C. rodgersii barrens -characterised when foliose macroalgae was lacking and locally abundant C. rodgersii individuals were present. Areas of grazed substratum could be discerned unambiguously. The substratum was classified either as flat rock shelves, very large boulders, large boulders, small boulders, cobble, pebble, gravel, or sand. Transect position was recorded using a GPS point for the start and finish of each transect. For diver names contact researcher or IMAS Data Manager.
- Hierarchy level
- Dataset
Resource lineage
- Statement
- GPS used datum WGS84. Note GPS inaccuracy may have resulted if datum type unknowingly changed etc (e.g. some data points appear on land, however subsite names give some reference as to point location).
- Hierarchy level
- Collection hardware
- Hierarchy level
- Dataset
Platform
Identifier
- Code
- diver
Metadata
- Metadata identifier
- 679ceb60-0aad-11dd-bf15-00188b4c0af8
- Language
- English
- Character encoding
- UTF8
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/679ceb60-0aad-11dd-bf15-00188b4c0af8
Point of truth URL of this metadata record
- Date info (Creation)
- 2020-08-21T08:05:28
- Date info (Revision)
- 2020-08-21T08:05:28
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available