Management options to minimise formation of urchin barrens: timed lobster swims - assessment of lobster size and abundance in south-eastern Tasmania

Characterisation of lobster (Jasus edwardsii) abundance and change in abundance at three different sampling sites (Cape Paul Lemanon, North Bay and Fortescue Bay) on the south-east coast of Tasmania, was assessed by GPS tracked SCUBA diver swims of 60 minutes in length whereby GPS was logged approximately every 5 seconds. Large tagged Rock Lobsters were introduced into one of the sampling sites, North Bay (which was closed to fishing). The swims are also being used to assess the impact of reef closure on the local lobster population.

Simple

Identification info

Date (Creation)
2011-09-16T15:58:00

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
ORCID ID >

Collaborator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Ling, Scott, Dr (Research Associate)
IMAS-Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
ORCID ID >

researchAssistant

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Sanderson, Craig, Dr (Senior Technical Officer)
IMAS-Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
Purpose
Assessment of Management Options to Minimise Formation of 'Barrens' Habitat by the Long-Spined Sea Urchin (Centrostephanus rodgersii) in Tasmania
Credit
Juan Gabriel Dominguez Sarimento
Credit
Funding: FRDC project 2007/045
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
ORCID ID >

Collaborator

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Ling, Scott, Dr (Marine Experimental and Quantitative Ecologist)
IMAS - Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
ORCID ID >

Spatial representation type
Text, table
Topic category
  • Biota

Extent

N
S
E
W


Temporal extent

Time period
2007-11-01T00:00:00 2011-02-28T00:00:00

Vertical element

Minimum value
5
Maximum value
20
Identifier
EPSG::5715
Name
MSL depth
Maintenance and update frequency
Not planned

Resource format

Title
Microsoft Excel (xlsx)
Date
Edition
2007
Global Change Master Directory Earth Science Keywords v.5.3.8
  • Oceans | Marine Biology | Marine Invertebrates
  • Biosphere | Aquatic Habitat | Reef Habitat
  • Oceans | Marine Biology | Marine Habitat
  • Biosphere | Ecological Dynamics | Community Structure
Keywords (Taxon)
  • Jasus edwardsii
Keywords (Theme)
  • Abundance
  • Size
  • GPS locations
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Keywords (Theme)
  • Carapace length
  • Sex
  • Depth
  • GPS location

Resource constraints

Classification
Restricted

Resource constraints

Use limitation
The data described in this record are the intellectual property of University of Tasmania through the Institute for Marine and Antarctic Studies

Resource constraints

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

License Graphic

Title
Creative Commons Attribution-Share Alike 2.5 Australia License


>

Website
http://creativecommons.org/licenses/by-sa/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
See point of contact for access to the data. Data will be available upon publication.

Associated resource

Title
FRDC project 2007/045
Date (unknown)
2011-09-16T00:00:00
Language
English
Character encoding
UTF8
Supplemental Information
References: Final FRDC Report in draft format.

Content Information

Content type
Physical measurement
Name
Carapace length

Name
mm
Name
Sex

Name
Depth

Name
metres
Name
GPS location

Distribution Information

Distribution format
  • Microsoft Excel (xlsx)

Resource lineage

Statement
At each of the three south-east sites, 4 timed lobster swims were conducted per sampling occasion. Additional swims were conducted at North Bay, in an attempt to obtain more tag re-sightings for translocated lobsters. A GPS device floating on the surface logging at 5 second intervals was tethered to and towed by a diver in order to track the swim survey. The diver synched GPS time with dive computer/ wrist watch and recorded time at which lobsters were sighted (which was then corroborated with the GPS time to obtain a lat, lon). The swim direction was parallel to the coast line (along shore) whilst trying to maintain a steady depth and course. The duration of each swim is 60 minutes bottom time. Whilst trying to maintain a constant speed (about 0.25 m/s), it was a priority to look carefully into crevices and under big boulders, places where rock lobsters usually hide and aggregate for protection. When a lobster was found the diver recorded the time and depth of the encounter and estimated Lobster carapace length (mm). If the conditions permitted (no risk to lobster’s health), the diver caught the lobster to record sex and measure its carapace length using callipers. If the lobster was tagged, the tag number was also recorded. The lobster was returned to the same spot where it was found.
Hierarchy level
Dataset

Resource lineage

Statement
GPS used datum WGS84.
Hierarchy level
Collection hardware

Metadata

Metadata identifier
e6e0a5b6-6e6e-4c95-8730-e2337333b29c

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/e6e0a5b6-6e6e-4c95-8730-e2337333b29c

Point of truth URL of this metadata record

Date info (Creation)
2020-09-17T17:56:59
Date info (Revision)
2020-09-17T17:56:59

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

Abundance Carapace length Depth GPS location GPS locations Sex Size
Global Change Master Directory Earth Science Keywords v.5.3.8
Biosphere | Aquatic Habitat | Reef Habitat Biosphere | Ecological Dynamics | Community Structure Oceans | Marine Biology | Marine Habitat Oceans | Marine Biology | Marine Invertebrates

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Associated resources

Not available