• TemperateReefBase Geonetwork Catalogue
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A pilot management program to maximise Tasmania's Sea Urchin (Heliocidaris erythrogramma) resource: Meredith Point, urchin density manipulations

The main aim of this research program was to determine the potential for reducing the density of urchins to encourage the return of seaweeds and an improvement in urchin roe quality and quantity from remaining urchins. Tasmanian Sea Urchin Developments used two widely-separated sub-tidal experimental lease areas. One of these areas was at Meredith Point, on the east coast, and the other at Hope Island, on the south coast. Both sites had been subject to some overgrazing by urchins. At Meredith Point, the study area was divided into plots containing urchins at three densities: artificially enhanced, continually harvested and control (undisturbed). At Hope Island, controlled clearings of urchins and limpets from barrens areas were conducted. Recovery of vegetation was monitored as well as urchin roe quality and quantity. The data represented by this record was collected at Meredith Point.

Simple

Identification info

Date (Creation)
2011-11-23T10:22:00

Principal investigator

Marine Environmental Systems - Sanderson, Craig, Dr
614 Nelson Road
Mt Nelson
TAS
7007
Australia

Collaborator

Tasmanian Sea Urchin Developments - Le Rossignol, Maurice
PO Box 172
Moonah
TAS
7009
Australia

Collaborator

Tasmanian Sea Urchin Developments - James, Will
PO Box 172
Moonah
TAS
7007
Australia
Purpose
To develop cost-effective, commercial enhancement techniques which will restore biological balance and maximise the fishery's value and employment potential by increasing both roe weight and roe quality.
Credit
Fisheries Research and Development Corporation (FRDC): 93/221
Status
Completed

Principal investigator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Sanderson, Craig, Dr
614 Nelson Road
Mt Nelson
TAS
7007
Australia
Topic category
  • Biota

Extent

N
S
E
W


Temporal extent

Time period
1993-12-21T00:00:00 1996-06-06T00:00:00

Vertical element

Minimum value
0
Maximum value
6
Identifier
EPSG::5715
Name
MSL depth
Maintenance and update frequency
Not planned

Resource format

Title
Microsoft Excel (xls)
Date
Edition
2003
Keywords (Taxon)
  • Heliocidaris erythrogramma
Keywords (Theme)
  • Urchin roe
  • Management
Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
  • MACROALGAE (SEAWEEDS)
  • BENTHIC HABITAT
  • ECHINODERMS
  • BROWN ALGAE
  • FISHERIES
Keywords (Discipline)
  • Temperate Reef
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
  • Fisheries Management
  • Marine and Estuarine Ecology (incl. Marine Ichthyology)
AODN Platform Vocabulary
  • diver
AODN Discovery Parameter Vocabulary
  • Abundance of biota
  • Biotic taxonomic identification
Keywords (Theme)
  • Algal coverage
  • Sand coverage

Resource constraints

Classification
Unclassified

Resource constraints

Use limitation
The data described in this record are the intellectual property of Tasmanian Sea Urchin Developments

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).

Associated resource

Title
Sea urchin management program
Date (Creation)
2011-11-29T00:00:00
Language
English
Character encoding
UTF8
Supplemental Information
Sanderson, JC., Le Rossignol, M., & James, W. (1996). A pilot program to maximise Tasmania's sea urchin (Heliocidaris erythrogramma) resource. FRDC Final Report. FRDC Grant 93/221.

Content Information

Content type
Physical measurement
Description
Abundance of urchins

Identifier

Code
Abundance of biota
Name
Number per 5 m2
Description
Point cover of algal species

Identifier

Code
Biotic taxonomic identification
Name
Algal coverage

Name
Point cover
Name
Sand coverage

Name
Point cover

Distribution Information

Distribution format
  • Microsoft Excel (xls)

Distributor

Principal investigator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Sanderson, Craig, Dr
OnLine resource
DATA - Meredith Point transects [direct download]

OnLine resource
REPORT - FRDC Report [direct download]

OnLine resource
REPORT - FRDC Report: Appendices 1 - 2 [direct download]

OnLine resource
imas:FR3_CJSanderson_Pilot_management_program_urchin_density_meredithpoint_GV

MAP - Site of urchin density manipulations

OnLine resource
View and download this data through the interactive IMAS Data Portal.

Resource lineage

Statement
Further details can be found in Section 3 of main report. At Meredith Pt, the effect of varying urchin densities obtained through differing harvesting strategies on roe yield of urchins was investigated. This was determined by partioning parts of the coast into plots (squares) and subjecting each to differing treatments. These treatments were: 1. Control squares. These were left relatively untouched for the period of the project. 2. Transplants. Urchins were transplanted into these areas from outside the lease site. This would show the effect of elevated densities on roe condition. It may also show if it was possible to improve the roe quality of the transplanted urchins. Transplanted urchins were from an area of low roe recovery. 3. Harvested squares. These squares were continuously harvested for the period of the project and so maintained a low density. The squares consisted of 50m sections of the coast with the boundaries perpendicular to the shore to the limit of hard substrate, marked by ropes weighted with concrete filled tyres. There were three blocks, each with three treatments. The three blocks are the eastern (E), middle (M) and western (W). Urchin density was monitored through 20 - 5 x 1 m quadrats and vegetations with 20 - 0.5 x 0.5 m quadrats for each square. The 0.5 x 0.5 m quadrat used for vegetation and substrate cover was subdivided with seven horizontal and vertical lines giving 49 intersection points. These and one of the corners gave 50 points. Algal cover and substrate were given a reading based on the number of points intersected. Total cover for algae can come to a number greater than 50 (100%) due to successive layers of algae. Algae were divided into species as best as possible underwater. For urchin density and algal cover, two transects were laid parallel to the coast for each square at distances of approximately, 15 and 25 m from shore. For urchin density, the diver recorded the number of urchins in contiguous 5 meter quadrats. For algae and substrate, the diver used a 0.25m2 quadrat positioned at each 10m mark. Density of the urchins was determined approximately every six months.
Hierarchy level
Dataset
Hierarchy level
Dataset

Platform

Identifier

Code
diver

Metadata

Metadata identifier
dbe0e67d-526d-437b-bbac-ac62b187a3df

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/dbe0e67d-526d-437b-bbac-ac62b187a3df

Point of truth URL of this metadata record

Date info (Creation)
2021-03-30T21:28:25
Date info (Revision)
2021-03-30T21:28:25

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

Algal coverage Management Sand coverage Urchin roe
AODN Discovery Parameter Vocabulary
Abundance of biota Biotic taxonomic identification
AODN Platform Vocabulary
diver
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Fisheries Management Marine and Estuarine Ecology (incl. Marine Ichthyology)
Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
BENTHIC HABITAT BROWN ALGAE ECHINODERMS FISHERIES MACROALGAE (SEAWEEDS)

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Associated resources

Not available


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