Biological and environmental correlates of reefs with contrasting abalone densities

In 2006, transect surveys were conducted at sites in eastern inshore Tasmanian waters at depths and habitats typical of those where abalone are commercially fished. Surveys focused on four areas of the Tasmanian coastline including St Helens, Bicheno and Dunalley on the east coast and the Actaeons region on the south-east coast; with at least 10 reefs sampled in each region.

Simple

Identification info

Date (Creation)
2007-07-03T00:00:00

Principal investigator

Tasmanian Aquaculture and Fisheries Institute (TAFI) - Valentine, Joseph, Dr (Post-doctoral fellow)
Private Bag 49
Hobart
TAS
7001
Australia

Collaborator

Tasmanian Aquaculture and Fisheries Institute (TAFI) - Mundy, Craig, Dr
Private Bag 49
Hobart
TAS
7001
Australia
ORCID ID >

Purpose
The purpose of this data collection is identify reef-scale patterns in algal understory change in relation to changes in abalone abundance.
Credit
Fisheries Research & Development Corporation FRDC 2004/013
Status
Completed

Collaborator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Mundy, Craig, Dr
IMAS - Taroona
Private Bag 49
Hobart
TAS
7001
Australia
ORCID ID >

Topic category
  • Biota

Extent

N
S
E
W


Temporal extent

Time period
2006-05-05T00:00:00 2006-08-03T00:00:00

Vertical element

Minimum value
2
Maximum value
8
Identifier
EPSG::5715
Name
MSL depth
Maintenance and update frequency
Not planned

Resource format

Title
Microsoft Access (mdb)
Date
Edition
2003
Global Change Master Directory Earth Science Keywords v5.3.8
  • Oceans | Marine Biology | Marine Invertebrates
  • Oceans | Marine Biology | Marine Habitat
  • Agriculture | Agricultural Aquatic Sciences | Fisheries
Keywords (Taxon)
  • Haliotis rubra
  • Blacklip abalone
  • crustose coralline algae
Keywords (Theme)
  • ecosystem changes
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Keywords (Theme)
  • Abalone abundance
  • Substratum type
  • crustose coralline algae coverage
  • canopy forming algae coverage

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 Tasmanian Aquaculture and Fisheries Institute.

Resource constraints

Linkage
http://i.creativecommons.org/l/by/2.5/au/88x31.png

License Graphic

Title
Creative Commons Attribution 2.5 Australia License


>

Website
http://creativecommons.org/licenses/by/2.5/au/

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).
Other constraints
Please contact C. Mundy for access to the data
Language
English
Character encoding
UTF8
Environment description
Uni_file_Id: TAS_SF_20070703_938
Supplemental Information
Frusher S, Buxton C, Barrett N, Tarbath D, Redd S, Semmens J, Hugh Pederson, Valentine J & Guest M (2009). Towards integrated multi-species management of Australia’s SE reef fisheries: A Tasmania example. Report to Fisheries Research and Development Corporation. No. 2004/013. Tasmanian Aquaculture & Fisheries Institute, University of Tasmania. Valentine J, Mundy C, Tarbath D, Frusher SD, Buxton C (2010) Limited evidence for ecosystem level change on reefs exposed to Haliotis rubra ('blacklip abalone') exploitation. Austral Ecology 35: 806-817.

Content Information

Content type
Physical measurement
Name
Abalone abundance

Name
Substratum type

Name
crustose coralline algae coverage

Name
canopy forming algae coverage

Distribution Information

Distribution format
  • Microsoft Access (mdb)

Distributor

Collaborator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Mundy, Craig, Dr
ORCID ID >

Resource lineage

Statement
At each survey site a 100-m transect was deployed from the boat along the 6–8 m depth contour (2-3m at a few Dunnalley sites. Five 20 m2 quadrats were positioned at 20-m intervals along the transect and in each quadrat the number of H. rubra and other large mobile grazers (e.g. sea urchins) was recorded. Total H. rubra abundance was split into two separate categories of ‘cryptic’ and ‘emergent’ based on the location of individual animals. Cryptic H. rubra were defined as those hidden in cracks and crevices, while emergent H. rubra occupied exposed reef surfaces. Abundance of canopy-forming algae in each quadrat was also estimated by classifying cover of different species according to the following categories: 1 = 0–10%; 2 = 11–30%; 3 = 31–50%; 4 = 51–75%; 5 = 76–100%. Abundance of understorey organisms (including algae and sessile invertebrates) was assessed in terms of percentage cover. Percentage cover was estimated with a 0.25 m2 ‘subquadrat’ using a point intercept method. The subquadrat was divided with a grid of 49 evenly spaced intersections and was laid flat on the reef during algal assessment. Algae occurring under each intercept and one corner of the subquadrat were recorded, to give a total of 50 intersections per subquadrat. Five randomly positioned subquadrats were assessed in this way for each 20 m2 quadrat. Organisms were identified in situ to the highest taxonomic resolution possible. For canopy algae identification to species level was possible; however, it was necessary to allocate other species to species complexes or guilds (e.g. crustose coralline algae, foliose red algae, sessile invertebrates). Further environmental correlates measured, included relative wave exposure.
Hierarchy level
Dataset

Metadata

Metadata identifier
6070de80-44a3-11dc-8cd0-00188b4c0af8

Language
English
Character encoding
UTF8

Point of contact

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - IMAS Data Manager

Type of resource

Resource scope
Dataset
Metadata linkage
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/6070de80-44a3-11dc-8cd0-00188b4c0af8

Point of truth URL of this metadata record

Date info (Creation)
2021-03-31T08:55:15
Date info (Revision)
2021-03-31T08:55:15

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

large_thumbnail

Spatial extent

N
S
E
W


Keywords

Abalone abundance Substratum type canopy forming algae coverage crustose coralline algae coverage ecosystem changes
Global Change Master Directory Earth Science Keywords v5.3.8
Agriculture | Agricultural Aquatic Sciences | Fisheries Oceans | Marine Biology | Marine Habitat Oceans | Marine Biology | Marine Invertebrates

Provided by

Share on social sites

Access to the record in catalogue

Associated resources

Not available