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Euphausiid assemblages of the oceanographically complex north-west marine bioregion of Australia, (2010)

Citation

CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC): Euphausiid assemblages of the oceanographically complex north-west marine bioregion of Australia, (2010) https://doi.org/10.15468/n2bysr accessed via GBIF.org on 2023-06-08.

Description

An area between 29°S and 31°S in the south-east Indian Ocean was investigated during a multidisciplinary study aboard the R.V. Southern Surveyor (voyage 05/2010) during the austral winter (17–21 July 2010). At each of the three latitudes, stations were sampled at 0.5° longitudinal intervals across shelf break and oceanic waters between 111.5°E and 115°E (Fig. 1). All stations had a water column depth >1000 m. In total, 13 stations form the focus of this study.

Depth-stratified zooplankton samples were taken using a multiple opening-closing EZ net (mesh size 355 μm; mouth area 1m2; Open Seas Instruments, Nova Scotia, Canada; similar to the BIONESS described by Sameoto et al., 1980). The EZ net was towed obliquely through the water column on a conductive cable which allowed remote control for releasing nets at chosen depth intervals (Wiebe et al., 2015). The net was towed at each of the 13 stations regardless of day or night (Supplementary data, Appendix S1). Four depth strata were targeted at each station; 0–50 m, 50–100 m, 100–150 m and 150–200 m. Nets were retrieved slowly at a vessel speed of 2 knots with 15 min in each depth stratum.

Zooplankton samples were preserved in 5% buffered formaldehyde in seawater solution. Estimates of available potential zooplankton prey that could be consumed by euphausiids were made by pouring the zooplankton samples from each depth stratum through a 1mm sieve and measuring the settled volume of remaining zooplankton in a graduated cylinder after a 24 h settling period

Mature and immature euphausiids from all stations were counted and identified to species level with the use of relevant taxonomic keys.

Additional info

marine, harvested by iOBIS

Taxonomic Coverages

  1. Euphausiacea
    rank: order

Geographic Coverages

North West Shelf, West Australia

Bibliographic Citations

  1. Alicia L. Sutton and Lynnath E. Beckley (2017) Euphausiid assemblages of the oceanographically complex north-west marine bioregion of Australia, Marine and Freshwater Research 68(11) 1988-1998 https://doi.org/10.1071/MF16334 - doi.org/10.1071/MF16334

Contacts

Alicia Sutton
originator
position: Principal Investigator
Murdoch University
West Australia
AU
Alicia Sutton
metadata author
position: Principal Investigator
Murdoch University
West Australia
AU
OBIS Australia Node manager
publisher
position: OBIS Australia Data Manager
CSIRO National Collections and Marine Infrastructure Data Centre
Castray Esplande
Hobart
7000
Tasmania
AU
email: obisau@csiro.au
homepage: http://www.obis.org.au
Alicia Sutton
administrative point of contact
position: Principal Investigator
Murdoch University
West Australia
AU
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