Pelagic Fishes of the Eastern Antarctic Ocean - data from BROKE-East survey

• Other Authors: CROSSLEY, CLIVE (hasPrincipalInvestigator), CROSSLEY, CLIVE (processor), HODDELL, RICHARD JAMES (processor), Australian Antarctic Data Centre (publisher)
• Format: Dataset
• Language: unknown
• Published: Australian Antarctic Data Centre
• Subjects: biota; FISH; EARTH SCIENCE; BIOLOGICAL CLASSIFICATION; ANIMALS/VERTEBRATES; EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PELAGIC; POPULATION DYNAMICS; BIOSPHERE; ECOLOGICAL DYNAMICS; SPECIES/POPULATION INTERACTIONS; CONSUMPTION RATES; ECOSYSTEM FUNCTIONS; COMMUNITY STRUCTURE; COMMUNITY DYNAMICS; % BY MASS; % BY NUMBER; DIET; FISH SPECIES; FISH TAXA PRESENT; FREQUENCY OF OCCURRENCE; LARVAE; LATITUDE; LONGITUDE; MASS OF ITEMS (G); MASS OF SPECIES (G); MAXIMUM DEPTH FISHED (M; MEAN STANDARD LENGTH (SL); MYCTOPHIDS; NOTOTHENIIDS; NUMBER OF INDIVIDUALS; NUMBER OF FISH TAXA; NUMBER OF ITEMS (G); PREY TAXON; Q % BY MASS * % BY VOLUME; STATION; STOMACHS EXAMINED; TOTAL MASS (G); TOTAL NUMBER OF INDIVIDUALS; TRAWL NUMBER; WATER VOLUME FILTERED (M3); BROKE EAST; BROKE; TRAWL; SHIPS; R/V AA > R/V Aurora Australis; OBIS > OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM; IPY > INTERNATIONAL POLAR YEAR; SCAR-MARBIN > SCAR Marine Biodiversity Information Network; CAML > CENSUS OF ANTARCTIC MARINE LIFE; COML > CENSUS OF MARINE LIFE; EBA > Evolution and Biodiversity in the Antarctic; OCEAN > SOUTHERN OCEAN; GEOGRAPHIC REGION > POLAR; Antarctic; Antarctic Ocean; Southern Ocean; The Antarctic; Antarc*; Antarctica; aurora australis; E. Antarctica; International Polar Year; IPY
• Online Access: https://researchdata.edu.au/pelagic-fishes-eastern-east-survey/700326; https://doi.org/10.4225/15/581aae937e1f4; https://data.aad.gov.au/metadata/records/ASAC_865; http://nla.gov.au/nla.party-617536

This study investigated distribution patterns of pelagic fish, larvae and juveniles collected by RMT trawls during ANARE's BROKE survey to CCAMLR Division 58.4.1 (80 degrees to 150 degrees E and from the Antarctic continent to 55 degrees S). 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 con tents 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. The fields in this dataset are: Station Longitude Latitude Trawl Number Maximum depth fished Number of Fish taxa Total number of individuals Total mass Fish taxa present Number of individuals Mean standard Length Mass of species Water volume filtered Fish Species Stomachs examined Prey taxon Frequency of occurrence (%) Number of items Mass of items % by number % by mass % by mass * % by volume