Fish and zooplankton from RMT-8 net hauls on the BROKE voyage
Distribution patterns of pelagic fish, larvae and juveniles collected by RMT trawls during BROKE survey to CCAMLR Division 58.4.1 were investigated. Nearly 2000 individuals, weighing 1210 g, were collected from approximately 1.5 million cubic metres of the upper 200 m of ocean, supporting the theory...
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ftands:oai:ands.org.au::757434 2023-05-15T13:34:12+02:00 Fish and zooplankton from RMT-8 net hauls on the BROKE voyage Australian Antarctic Data Centre (isManagedBy) https://researchdata.edu.au/fish-zooplankton-rmt-broke-voyage/757434 unknown Atlas of Living Australia https://researchdata.edu.au/fish-zooplankton-rmt-broke-voyage/757434 ala.org.au/dr6249 Australian Antarctic Data Centre dataset ftands 2022-12-19T23:31:34Z Distribution patterns of pelagic fish, larvae and juveniles collected by RMT trawls during BROKE survey to CCAMLR Division 58.4.1 were investigated. Nearly 2000 individuals, weighing 1210 g, were collected from approximately 1.5 million cubic metres 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. coasti. The shelf break zone comprised 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 geographic range of several species. Zooplankton data from routine 0-200 m oblique trawls were analysed using cluster analysis and non-metric multidimensional scaling to define the communities in Eastern Antarctica (80-150 E), their distribution patterns, indicator species, and species affinities. Three communities were defined based on routine trawls. The Main Oceanic Community comprising herbivorous copepods, chaetognaths, and the euphausiid Thysanoessa macrura dominated the area west of 120 E. The area east of 120 E was dominated by Salpa thompsoni. The third community located in the neritic zone was dominated by Euphausia crystallorophias. Antarctic krill Euphausia superba did not form a distinct community in its own right, unlike previous observations in Prydz ... Dataset Antarc* Antarctic Antarctic Krill Antarctica E. Antarctica Euphausia superba Thysanoessa macrura Copepods Research Data Australia (Australian National Data Service - ANDS) Antarctic |
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Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
description |
Distribution patterns of pelagic fish, larvae and juveniles collected by RMT trawls during BROKE survey to CCAMLR Division 58.4.1 were investigated. Nearly 2000 individuals, weighing 1210 g, were collected from approximately 1.5 million cubic metres 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. coasti. The shelf break zone comprised 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 geographic range of several species. Zooplankton data from routine 0-200 m oblique trawls were analysed using cluster analysis and non-metric multidimensional scaling to define the communities in Eastern Antarctica (80-150 E), their distribution patterns, indicator species, and species affinities. Three communities were defined based on routine trawls. The Main Oceanic Community comprising herbivorous copepods, chaetognaths, and the euphausiid Thysanoessa macrura dominated the area west of 120 E. The area east of 120 E was dominated by Salpa thompsoni. The third community located in the neritic zone was dominated by Euphausia crystallorophias. Antarctic krill Euphausia superba did not form a distinct community in its own right, unlike previous observations in Prydz ... |
author2 |
Australian Antarctic Data Centre (isManagedBy) |
format |
Dataset |
title |
Fish and zooplankton from RMT-8 net hauls on the BROKE voyage |
spellingShingle |
Fish and zooplankton from RMT-8 net hauls on the BROKE voyage |
title_short |
Fish and zooplankton from RMT-8 net hauls on the BROKE voyage |
title_full |
Fish and zooplankton from RMT-8 net hauls on the BROKE voyage |
title_fullStr |
Fish and zooplankton from RMT-8 net hauls on the BROKE voyage |
title_full_unstemmed |
Fish and zooplankton from RMT-8 net hauls on the BROKE voyage |
title_sort |
fish and zooplankton from rmt-8 net hauls on the broke voyage |
publisher |
Atlas of Living Australia |
url |
https://researchdata.edu.au/fish-zooplankton-rmt-broke-voyage/757434 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctica E. Antarctica Euphausia superba Thysanoessa macrura Copepods |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica E. Antarctica Euphausia superba Thysanoessa macrura Copepods |
op_source |
Australian Antarctic Data Centre |
op_relation |
https://researchdata.edu.au/fish-zooplankton-rmt-broke-voyage/757434 ala.org.au/dr6249 |
_version_ |
1766049852349743104 |