Using stylet elemental signatures to determine the population structure of Octopus maorum

A novel method was used to investigate the population structure and dispersal patterns of Octopus maorum, an octopus species with a planktonic larval stage, which forms a distinct and large aggregation in southeast Tasmania. Single and multi-elemental signatures within the ‘early life history’ region of the stylet (an internal ‘shell’) were used to determine levels of connectivity and the common origins of individuals collected from 5 locations across Tasmania, South Australia and New Zealand.

Simple

Identification info

Date (Creation)
2011-10-26T15:36:00

Principal investigator

Tasmanian Aquaculture and Fisheries Institute (TAFI) - Doubleday, Zoe (PhD student)
Tasmanian Aquaculture and Fisheries Institute, University of Tasmania
Private Bag 49
Hobart
TAS
7001
Australia
ORCID ID >

Collaborator

Tasmanian Aquaculture and Fisheries Institute (TAFI) - Pecl, Gretta, Dr (PhD Supervisor)
Tasmanian Aquaculture and Fisheries Institute, University of Tasmania
Private Bag 49
Hobart
Tasmania
7001
Australia
ORCID ID >

Collaborator

Tasmanian Aquaculture and Fisheries Institute (TAFI) - Semmens, Jayson, Dr (PhD supervisor)
Tasmanian Aquaculture and Fisheries Institute, University of Tasmania
Private Bag 49
Hobart
Tasmania
7001
Australia
ORCID ID >

Credit
Holsworth Wildlife Research Endowment
Credit
Department of Primary Industries and Water (Tasmania)
Credit
Winifred Violet Scott Estate Grant
Credit
Unitas Malacologica
Status
Completed

Principal investigator

School of Biological Sciences, The University of Adelaide - Doubleday, Zoe, Dr (Post-doctoral fellow)
The University of Adelaide
Adelaide
South Australia
5005
Australia
ORCID ID >

Collaborator

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

Topic category
  • Oceans

Extent

N
S
E
W


N
S
E
W


N
S
E
W


Temporal extent

Time period
2006-01-01T00:00:00 2007-12-31T00:00:00

Vertical element

Minimum value
1
Maximum value
40
Identifier
EPSG::5715
Name
MSL depth
Maintenance and update frequency
Not planned

Resource format

Title
Microsoft Excel
Date
Edition
2003
Global Change Master Directory Earth Science Keywords v5.3.8
  • Biosphere | Zoology | Mollusks
Keywords (Theme)
  • Population structure
  • Laser ablation
  • Stylet
  • Dispersal
Keywords (Taxon)
  • Octopus maorum
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Keywords (Theme)
  • Whole wet weight
  • Mantle weight
  • Sex
  • Stage of maturity
  • Element concentration

Resource constraints

Classification
Unclassified

Resource constraints

Use limitation
The data described in this record are the intellectual property of Zoe Doubleday.

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 Z. Doubleday for access to the data.

Associated resource

Title
Population structure of two commercial octopus species
Date (Creation)
2011-10-26T00:00:00
Language
English
Character encoding
UTF8
Environment description
Uni_file_Id: TAS_ZD_20070718_885
Supplemental Information
Doubleday, ZA, ‘An integrative approach to understanding the population structure and dispersal patterns of two commercial octopus species (Octopus maorum and Octopus pallidus)’ (2009). PhD thesis, University of Tasmania Doubleday, ZA and Pecl, GT and Semmens, JM and Danyushevsky, LV, ‘Using stylet elemental signatures to determine the population structure of Octopus maorum’, Marine Ecology Progress Series, 360 (22 May) pp. 125-133. ISSN 0171-8630 (2008)

Content Information

Content type
Physical measurement
Name
Whole wet weight

Name
kg
Name
Mantle weight

Name
g
Name
Sex

Name
Stage of maturity

Name
Element concentration

Name
ppm

Distribution Information

Distribution format
  • Microsoft excel (xls)

Distributor

Principal investigator

School of Biological Sciences, The University of Adelaide - Doubleday, Zoe, Dr
ORCID ID >

Resource lineage

Statement
Octopuses were collected from 5 sites: northeast Tasmania (NE), southwest Tasmania (SW), the Eaglehawk Bay aggregation (EHB) in southeast Tasmania, South Australia (SA) and New Zealand (NZ). Octopuses were collected as bycatch from rock lobster fishers (at depths between 10 and 40 m) from all sites except EHB, where they were collected from the commercial octopus fishery (at depths between 1 and 3 m). All specimens were frozen prior to dissection. Whole wet weight (kg) or mantle weight (g) (as the arms were often removed), sex and stage of maturity were recorded. Males were classed as mature or immature, depending on the presence or absence of visible spermatophores in Needham’s sac. Females were assigned a maturity stage from 1 to 3 (immature, maturing or mature) depending on ovary size and level of egg development. Octopuses ranged in size from 0.7 to 10.2 kg. All males and 50% of females were mature. Stylets were removed from thawed mantle tissue and allowed to air dry for 2 d prior to being stored dry. For further information on stylet preparation please consult the published paper.
Hierarchy level
Dataset

Metadata

Metadata identifier
905d1aa3-fd5b-4fbe-83c8-22cf0b84ab18

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/905d1aa3-fd5b-4fbe-83c8-22cf0b84ab18

Point of truth URL of this metadata record

Date info (Creation)
2015-09-03T15:08:10
Date info (Revision)
2015-09-03T15:08:10

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


N
S
E
W


N
S
E
W


Keywords

Dispersal Element concentration Laser ablation Mantle weight Population structure Sex Stage of maturity Stylet Whole wet weight
Global Change Master Directory Earth Science Keywords v5.3.8
Biosphere | Zoology | Mollusks

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Associated resources

Not available