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RMT Trawl catch from the 1995/96 V4 BROKE voyage
Citation
Australian Antarctic Data Centre, RMT Trawl catch from the 1995/96 V4 BROKE voyage

Access data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.

Description
This study investigated distribution patterns of pelagic fish, larvae and juveniles collected by RMT trawls during ANAREs 1995/96 Voyage BROKE survey more

After the BROKE-West survey of 2006, the original BROKE survey was renamed BROKE-East. The project attempted to explain these patterns in terms of dietary factors and tolerance to different thermohaline regimes. Nearly 2000 individuals, weighing 1210 g, were collected, from approximately 1.5 million m3 of the upper 200 m of ocean, supporting the theory that Antarctic ichthyoplankton has low biomass. The collection consisted mainly of P. antarcticum larvae and juveniles and E. antarctica sub-adults, with a range of other notothenioid fish and myctophids. Three distinct biogeographic zones, with characteristic ichthyo- and zooplankton assemblages were identified. The Oceanic Zone was dominated by myctophids and, in the western reaches, the paralepidid N. coatsi. The Shelf Break Zone was comprised mainly of myctophids, and the juveniles of notothenioid fish. The Shelf Zone consisted of notothenioid juveniles and sub-adults. Characteristic water masses and associated zooplankton assemblages were found throughout these three zones. Analysis of fish stomach contents indicated feeding on locally abundant zooplankton taxa. There was niche-partitioning of prey taxa and size-classes, between both sympatric species and between different ontogenetic stages. Fish distributions corresponded to known patterns, and extended the known geographic range of several species.

Scope
Themes:
Biology > Fish
Keywords:
Marine, PS, Southern Ocean, Pisces

Geographical coverage
PS, Southern Ocean [Marine Regions]

Temporal coverage
19 January 1996 - 31 March 1996
Unknown

Taxonomic coverage
Pisces [WoRMS]

Parameter
Presence of biota

Contributors
Australian Antarctic Division (AAD), moretechnician

Related datasets
Published in:
AntOBIS: Antarctic Ocean Biogeographic Information System, more


Dataset status: Completed
Data type: Data
Data origin: Research: field survey
Metadatarecord created: 2008-02-07
Information last updated: 2015-08-27
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