Data to support Two scales of distribution and biomass of Antarctic krill (Euphausia superba) in the eastern sector of the CCAMLR Division 58.4.2 (55°E to 80°E)

This data may be used to reproduce the analyses (including figures and tables), of 'Two scales of distribution and biomass of Antarctic krill (Euphausia superba) in the eastern sector of the CCAMLR Division 58.4.2 (55°E to 80°E)'.


The data describe krill biomass density distribution and krill net samples (krill total length and krill wetmass) collected during the 2021 TEMPO voyage on R/V Investigator.


During the TEMPO voyage krill biomass was estimated using observations from two sampling instruments: a calibrated EK80 scientific echosounder operating at 120 kHz and an rectangular midwater trawl (RMT 1+8). The supporting data sets, all in CSV format, are split by instrument type.


The EK80 has two datafiles:


1. krill_density.csv – krill areal density from the TEMPO transects, and

2. krill_swarms.csv -krill swarms detected during the TEMPO transects.


The RMT1+8 has four datafiles


1. net_locations.csv

2. krill_lengths.csv

3. krill_wet_mass_to_length.csv

4. krill_wet_mass_to_length_model_predictions.csv


The fields (columns) in each data file are:


krill_density.csv

"lat_M" – centre latitude of an echo integration interval [degrees] (dd.ddddd) WGS84 spheroid (GPS latitude)

"lon_M" - centre longitude of an echo integration interval [degrees] (dd.ddddd) WGS84 spheroid (GPS longitude),

"areal_biomass_density_g_per_m2" – Echo integration interval krill areal biomass density [g wet-mass / m^2]

"daynight" – flag for when the sampling took place [day/night]

"survey" – Either the main survey for the TEMPO biomass survey or the smaller-scale ‘Mawson box’ survey


krill_swarms.csv

"transect" – transect number

"lat" – latitude [degrees] (dd.ddddd) WGS84 spheroid (GPS latitude)

"swarm_depth_m" – mean depth of a krill swarm [m]

"daynight" – flag for when the sampling took place [day/night]

”volumetric_density_g_per_m3" – krill swarm internal volumetric biomass density [g wet-mass / m^3]


net_locations.csv

"station" – Station name for net trawl R for routine haul, T for target trawl

"lat" – mean latitude of a net trawl [degrees] (dd.ddddd) WGS84 spheroid (GPS latitude)

"lon" – mean longitude of a net trawl [degrees] (dd.ddddd) WGS84 spheroid (GPS longitude)

"daynight" – flag for when the sampling took place [day/night]


krill_lengths.csv

"station" – Station name for net trawl R for routine haul, T for target trawl

"total_length_mm” – total length of an individual krill [mm]


krill_wet_mass_to_length.csv

"total_length_mm" – total length of an individual krill [mm]

"wet_mass_g" - wet-mass an individual krill [g]


krill_wet_mass_to_length_model_predictions.csv

"total_length_mm" - total length of an individual krill [mm]

"predicted_wet_mass_g" – predicted mean wet-mass an individual krill of length ("total_length_mm" ) [g]

"LB_wet_mass_g" – Lower bound (lower 95% confidence interval) for the predicted_wet_mass_g [g]

"UB_wet_mass_g"– Upper bound (upper 95% confidence interval) for the predicted_wet_mass_g [g]

Simple

Identification info

Alternate title
Data to support Two scales of distribution and biomass of Antarctic krill (Euphausia superba) in the eastern sector of the CCAMLR Division 58.4.2 (55°E to 80°E)
Date (Publication)
2022-08-12
Edition
1
Citation identifier
Dataset DOI

Title
Information and documentation - Digital object identifier system
Date (Publication)
2012-04-23
Citation identifier
ISO 26324:2012

Citation identifier
doi:10.26179/ebab-b111

Originator

Kawaguchi, S., Cox, M., King, R., Macaulay, G., Brasier, M.J., Burns, A., Johnson, O.J., Maschette, D., Melvin, J., Smith, A., Weldrick, C.K. and Wotherspoon, S.

Publisher

Australian Antarctic Data Centre

Principal investigator

KAWAGUCHI, SO
Australian Antarctic Division
Channel Highway
Kingston
Tasmania
7050
Australia

Principal investigator

COX, MARTIN
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Principal investigator

KING, ROB
Australian Antarctic Division
Channel Highway
Kingston
Tasmania
7050
Australia

Principal investigator

MACAULAY, GAVIN
Aqualyd Limited,
Wakefield,
New Zealand

Principal investigator

BRASIER, MADELEINE J
Institute for Marine and Antarctic Studies,
University of Tasmania,
Taroona
Tasmania
Australia

Principal investigator

BURNS, ALICIA
School of Life and Environmental Sciences,
University of Sydney
Sydney
NSW
Australia

Principal investigator

JOHNSON, OLIVIA J
Institute for Marine and Antarctic Studies,
University of Tasmania
Taroona
Tasmania
Australia

Principal investigator

MASCHETTE, DALE
Australian Antarctic Division,
203 Channel Highway
Kingston
Tasmania
7050
Australia

Principal investigator

MELVIN, JESSICA
Australian Antarctic Program Partnership,
Institute for Marine and Antarctic Studies,
University of Tasmania
Hobart
Tasmania
7001
Australia

Principal investigator

SMITH, ABIGAIL
Australian Antarctic Division,
203 Channel Highway
Kingston
Tasmania
7050
Australia

Principal investigator

WELDRICK, CHRISTINE K
Australian Antarctic Program Partnership,
Institute for Marine and Antarctic Studies,
University of Tasmania
Hobart
Tasmania
7001
Australia

Principal investigator

WOTHERSPOON, SIMON
Australian Antarctic Division,
203 Channel Highway
Kingston
Tasmania
7050
Australia

Collaborator

COX, MARTIN
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Collaborator

KING, ROB
Australian Antarctic Division
Channel Highway
Kingston
Tasmania
7050
Australia

Collaborator

WOTHERSPOON, SIMON
Australian Antarctic Division,
203 Channel Highway
Kingston
Tasmania
7050
Australia
Name
CAASM Metadata
Website
https://data.aad.gov.au/metadata/records/AAS_4512_TEMPO_bioacoustics

Purpose
The purpose of these data are three fold: 1. Enable the estimation of krill biomass in the eastern sector of the CCAMLR Division 58.4.2 (55°E to 80°E); 2. Access how representative krill observed in a small-scale survey to krill seen at larger scales, and 3. Support the publication of the accompanying paper.
Status
Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Spatial resolution

Vertical sampling distance
4

Spatial resolution

Spatial resolution
10
Temporal resolution
PT2S
Topic category
  • Biota
  • Oceans

Extent

N
S
E
W


Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2021-02-13 2021-03-11

Extent

Description
Vertical Extent - Altitude

Vertical element

Minimum value
0
Maximum value
0
Identifier
urn:x-ogc:def:cs:EPSG:6499
Name
Vertical CS. Axis: height (H). Orientation: up. UoM: m.
Identifier
urn:x-ogc:def:axis:EPSG:114
Name
height

Extent

Description
Vertical Extent - Depth

Vertical element

Minimum value
10
Maximum value
250
Identifier
urn:x-ogc:def:cs:EPSG:6498
Name
Vertical CS. Axis: depth (D). Orientation: down. UoM: m.
Identifier
urn:x-ogc:def:axis:EPSG:113
Name
depth
NASA/GCMD Earth Science Keywords
  • EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > EUPHAUSIIDS (KRILL)
  • EARTH SCIENCE > OCEANS > OCEAN ACOUSTICS > ACOUSTIC FREQUENCY
  • EARTH SCIENCE > OCEANS > OCEAN ACOUSTICS > ACOUSTIC SCATTERING
Keywords
  • 120 KHZ ECHO INTEGRATION
  • KRILL AREAL BIOMASS DENSITY
  • CCAMLR DIVISION 58.4.2
  • KRILL SWARM
  • RV INVESTIGATOR
  • KRILL WETMASS
  • KRILL LENGTH
  • EK80 SCIENTIFIC ECHO SOUNDER
  • RMT8
NASA/GCMD Earth Science Keywords
  • ECHO SOUNDERS
  • MIDWATER TRAWLS
NASA/GCMD Earth Science Keywords
  • SHIPS
NASA/GCMD Earth Science Keywords
  • AMD/AU
  • AMD
  • CEOS
NASA/GCMD Earth Science Keywords
  • GEOGRAPHIC REGION > POLAR
  • OCEAN > SOUTHERN OCEAN
  • CONTINENT > ANTARCTICA

Resource constraints

Use limitation
This metadata record is publicly available.

Resource constraints

Access constraints
licence
Other constraints
These data are publicly available for download from the provided URL.

Resource constraints

File type
Portable Network Graphic
Linkage
Creative Commons by Attribution logo

Title
Attribution 4.0 International (CC BY 4.0)
Website
https://creativecommons.org/licenses/by/4.0/legalcode

Legal code for Creative Commons by Attribution 4.0 International license

Use constraints
licence
Other constraints
This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4512_TEMPO_bioacoustics when using these data.
Language
English
Character encoding
UTF8

Distribution Information

Distributor

Distributor

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Distributor

Fees
Free
Planned available datetime
2022-08-12T00:00:00
Units of distribution
kb
Transfer size
400
Distribution format
  • csv

OnLine resource
GET DATA > DIRECT DOWNLOAD

Download the dataset.

OnLine resource
PROJECT HOME PAGE

Public information for AAS project AAS_4512

OnLine resource
VIEW RELATED INFORMATION

Citation reference for this metadata record and dataset.

Maintenance and update frequency
As needed
Maintenance note
2022-03-02 - record created by Martin Cox. 2022-08-12 - record updated by Dave Connell to publicly release the data.

Metadata

Metadata identifier
string/AAS_4512_TEMPO_bioacoustics

Language
English
Character encoding
UTF8

Author

COX, MARTIN
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Sponsor

Australian Antarctic Division

Owner

AADC

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
a112210f-0594-4900-a30e-6991442eea21

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Date (Last Revision)
2022-08-12T11:59:27

Identifier

Description
metadata.extraction_date

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
8.6

Metadata linkage
http://data.aad.gov.au/metadata/records/AAS_4512_TEMPO_bioacoustics

Point of truth for the metadata record

Date info (Creation)
2022-03-01T00:00:00
Date info (Last Update)
2022-08-12

Metadata standard

Title
ISO 19115-3
Edition
2014
Other citation details
Version 1
Title
DIF to ISO 19115-1 Profile
 
 

Overviews

Spatial extent

N
S
E
W


Keywords


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