Data

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

Name: Using stylet elemental signatures to determine the population structure of Octopus maorum
Published: 2011

University of Tasmania, Australia

Doubleday, Zoe ; Pecl, Gretta, Dr ; Semmens, Jayson, Dr

Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]

ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/905d1aa3-fd5b-4fbe-83c8-22cf0b84ab18&rft.title=Using stylet elemental signatures to determine the population structure of Octopus maorum&rft.identifier=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/905d1aa3-fd5b-4fbe-83c8-22cf0b84ab18&rft.description=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.Maintenance and Update Frequency: notPlannedStatement: 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.&rft.creator=Doubleday, Zoe &rft.creator=Pecl, Gretta, Dr &rft.creator=Semmens, Jayson, Dr &rft.date=2011&rft.coverage=westlimit=144.50; southlimit=-44.00; eastlimit=148.50; northlimit=-39.00&rft.coverage=westlimit=144.50; southlimit=-44.00; eastlimit=148.50; northlimit=-39.00&rft.coverage=westlimit=134.0; southlimit=-35.0; eastlimit=136.0; northlimit=-33.0&rft.coverage=westlimit=134.0; southlimit=-35.0; eastlimit=136.0; northlimit=-33.0&rft.coverage=westlimit=174.0; southlimit=-42.0; eastlimit=176.0; northlimit=-41.0&rft.coverage=westlimit=174.0; southlimit=-42.0; eastlimit=176.0; northlimit=-41.0&rft.coverage=uplimit=40; downlimit=1&rft.coverage=uplimit=40; downlimit=1&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au/&rft_rights=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).&rft_rights=Please contact Z. Doubleday for access to the data.&rft_rights=The data described in this record are the intellectual property of Zoe Doubleday.&rft_subject=oceans&rft_subject=MOLLUSKS&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/INVERTEBRATES&rft_subject=Population structure&rft_subject=Laser ablation&rft_subject=Stylet&rft_subject=Dispersal&rft_subject=Octopus maorum&rft_subject=Aquatic Ecosystem Studies and Stock Assessment&rft_subject=AGRICULTURAL AND VETERINARY SCIENCES&rft_subject=FISHERIES SCIENCES&rft_subject=Fisheries Sciences not elsewhere classified&rft_subject=Population Ecology&rft_subject=BIOLOGICAL SCIENCES&rft_subject=ECOLOGY&rft_subject=Invertebrate Biology&rft_subject=ZOOLOGY&rft_subject=Marine and Estuarine Ecology (incl. Marine Ichthyology)&rft_subject=Whole wet weight&rft_subject=Mantle weight&rft_subject=Sex&rft_subject=Stage of maturity&rft_subject=Element concentration&rft.type=dataset&rft.language=English Access the data

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Creative Commons Attribution 2.5 Australia License
http://creativecommons.org/licenses/by/2.5/au/

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).

Please contact Z. Doubleday for access to the data.

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

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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.

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Maintenance and Update Frequency: notPlanned

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.

Notes

Credit
Holsworth Wildlife Research Endowment

Credit
Department of Primary Industries and Water (Tasmania)

Credit
Winifred Violet Scott Estate Grant

Credit
Unitas Malacologica

Created: 26 10 2011

Data time period: 2006 to 31 12 2007

This dataset is part of a larger collection

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text: westlimit=144.50; southlimit=-44.00; eastlimit=148.50; northlimit=-39.00

text: westlimit=134.0; southlimit=-35.0; eastlimit=136.0; northlimit=-33.0

text: westlimit=174.0; southlimit=-42.0; eastlimit=176.0; northlimit=-41.0

text: uplimit=40; downlimit=1

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global : 905d1aa3-fd5b-4fbe-83c8-22cf0b84ab18