Stylet elemental signatures indicate population structure in a holobenthic octopus species, Octopus pallidus

Targeted trace elemental analysis was used to investigate the population structure and dispersal patterns of the holobenthic octopus species Octopus pallidus. Multi-elemental signatures within the pre-hatch region of the stylet (an internal ‘shell’) were used to determine the common origins and levels of connectivity of individuals collected from 5 locations in Tasmania. To determine whether hatchling elemental signatures could be used as tags for natal origin, hatchling stylets from 3 of the 5 locations were also analysed.

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


Temporal extent

Time period
2006-05-01T00:00:00 2007-09-30T00:00:00

Vertical element

Minimum value
12
Maximum value
30
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
  • Stylet
  • Elemental signatures
  • Laser ablation
Keywords (Taxon)
  • Octopus pallidus
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Keywords (Theme)
  • Whole body 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, ‘Stylet elemental signatures indicate population structure in a holobenthic octopus species, Octopus pallidus’, Marine Ecology Progress Series, 371 (19 November) pp. 1-10. ISSN 0171-8630 (2008)

Content Information

Content type
Physical measurement
Name
Whole body 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
Octopus hatchlings were collected from 3 sites: Circular Head (CH) on the north coast of Tasmania, and Mercury Passage (MP) and Northwest Bay (NWB) on the southeast coast of Tasmania, Australia. Unbaited octopus pots attached to demersal longlines and set at depths between 12 to 30 m were used to provide nesting habitat for mature females. Pots were deployed for 3 to 5 mo and were checked regularly for egg broods. If eggs were present, a PVC mesh bag was tied securely around the pot to aid hatchling collection and prevent predation on the eggs. The pot was subsequently checked every 2 to 4 wk. This procedure did not affect the mother, as she did not feed or leave her ‘den’ during egg development. The well developed benthic hatchlings were collected as ‘near hatching’ eggs or recently hatched individuals. To assess the temporal short-term variation in hatchling elemental signatures, 2 additional batches of hatchlings were collected from NWB, with collections spaced 4 to 6 wk apart. All specimens were frozen (the –18°C) upon collection. Using pots and longlines, adult octopuses were collected 6 to 10 mo after the hatchlings from the same sites described above. According to an age study of Octopus pallidus from the collection site, mature adults had an average age of 8 mo. Therefore, it is likely that these adults hatched around the time the hatchlings were collected. To minimise potentially confounding temporal variation in elemental signatures, it is recommended that adults are assigned to natal site based on juvenile elemental signatures that are from a similar age cohort to the adults. Adults without an ‘equivalent’ hatchling sample were additionally collected from west Flinders Island (WFI) and east Flinders Island (EFI). For each adult specimen, whole weight (g), sex and maturity stage were recorded. Males were classified 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 5. Stages 1 to 4 (immature to mature) were assigned according to ovary size and level of egg development, and Stage 5 was assigned to postspawning females. Octopuses ranged in weight from 280 to 1012 g, all males were mature and most females were either Stage 3 or 4. For further information on stylet preparation and analysis, please consult the published paper.
Hierarchy level
Dataset

Metadata

Metadata identifier
bf45925b-a422-4849-b17d-071564b386b0

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/bf45925b-a422-4849-b17d-071564b386b0

Point of truth URL of this metadata record

Date info (Creation)
2019-03-06T18:29:19
Date info (Revision)
2019-03-06T18:29:19

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

Element concentration Elemental signatures Laser ablation Population structure Sex Stage of maturity Stylet Whole body weight
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Fisheries Management Marine and Estuarine Ecology (incl. Marine Ichthyology)
Global Change Master Directory Earth Science Keywords v5.3.8
Biosphere | Zoology | Mollusks

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