IMAS Metadata Catalogue
2023
Type of resources
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Years
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Data from multibeam echosounder surveys taken as part of the Ningaloo Outlook project were classified into various seafloor cover types according to their hardness, rugosity and depth. The classifications were validated with towed video ground truth where it was available. This dataset describes two AOIs which are explicitly part of the Ningaloo Outlook Deep Reefs project. Substratum classifications were applied using multibeam backscatter angular response curves along with rugosity as input to a maximum likelihood classifier. See original metadata record(s) and associated attached documents for accuracy estimates, alternate classification techniques, and additional surveyed areas. https://doi.org/10.25919/kssa-5b46 https://doi.org/10.25919/kttc-x397 https://doi.org/10.25919/8m65-7k26
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Aquatic flora surveys of the Hardy Inlet were conducted from the top of Molloy Island and the Scott River Basin to the mouth of the Inlet. Surveys were initially conducted in 2008 by Murdoch University’s Marine and Freshwater Research Laboratory (MAFRL) and forms part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. Surveys were conducted again in 2018, 2020 & 2023 by the Department of Water and Environmental Regulation as "Hardy Inlet Seagrass Survey". The datasets making up the 2008 Hardy Inlet seagrass survey data are: WA_MAFRL_Hardy_seagrass_polygons - polygon dataset showing interpolated percentage cover of Ruppia spp. This record provides access to the initial MAFRL surveys. See associated DWER records in Data WA catalogue for access to newer surveys at this site.
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Aquatic flora surveys were conducted in the Leschenault Estuary in April 2009. This data is part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. Surveys were initially conducted by the WA Department of Water together with Geoscience Australia. The objective of these surveys was to collect baseline data on seagrass composition and distribution in key estuaries of southern and south-western WA. This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. Surveys were conducted again 2015-2023 (February 2015, February and March 2016, February 2017, February and March 2018, February 2019, February and March 2020, February 2021, February and March 2022, and February and March 2023) by the Department of Water and Environmental Regulation as "Leschenault Estuary Seagrass Survey". The datasets making up the 2009 Leschenault Estuary seagrass survey data are: WA_Leschenault_SAV_sites - point dataset of species presence/absence and survey methodology at each site. WA_Leschenault_SAV_polygons - polygon dataset showing interpolated percentage cover in polygons derived from site points. This record provides access to the initial WA DoW surveys. See associated DWER records in Data WA catalogue for access to newer surveys at this site.
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Repeat surveys of aquatic flora were conducted in Princess Royal Harbour in 1996, 2003, 2005 and 2006. This data is part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. Surveys were initially conducted by the WA Department of Water. The objectives of the study were to map the distribution of the different seagrass species found in Princess Royal Harbour and Oyster Harbour and to compare the distributions with that observed in previous studies (1996 and 2003). This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. Surveys were conducted again in January and March 2021 by the Department of Water and Environmental Regulation as "Princess Royal Harbour Seagrass Survey". The datasets making up the 1996-2006 Princess Royal Harbour seagrass survey data are: WA_PrincessRoyal_seagrass_polygons - polygon dataset showing interpolated percentage cover of seagrass. This record provides access to the initial WA DoW surveys. See associated DWER records in Data WA catalogue for access to newer surveys at this site.
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The datasets contain summaries of Western Australia aquaculture locations in state marine and estuarine waters. The data has been recorded and submitted to WA DPI.
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Distribution and abundance of seagrass, mangrove and saltmarsh in NSW estuaries. This dataset is ongoing. This record describes a snapshot of the data taken in February 2023 for use in the Seamap Australia project. A more recent version of the dataset may be available through the NSW DPI Fisheries Data Portal. This dataset supersedes https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/281FAA64-F6F3-400C-A48F-D342E4ABCA83 (Estuarine macrophytes of NSW 2009) and https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/021f65eb-38c6-4db2-9dbe-821b6b427780 (An Estuarine Inventory for NSW 1984).
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Repeat surveys of aquatic flora were conducted in Oyster Harbour in 1988, 1996 and 2006. This data is part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. Surveys were initially conducted by the WA Department of Water. The objectives of the study were to map the distribution of the different seagrass species found in Princess Royal Harbour and Oyster Harbour and to compare the distributions with that observed in previous studies (1988 and 1996). This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. Surveys were conducted again in March 2019 and January 2021 by the Department of Water and Environmental Regulation as "Oyster Harbour Seagrass Survey". The datasets making up the 1988-2006 Oyster Harbour seagrass survey data are: WA_Oyster_seagrass_polygons - polygon dataset showing interpolated percentage cover of seagrass (all species combined for 1988 & 1997 surveys, with species information for 2006 survey). This record provides access to the initial WA DoW surveys. See associated DWER records in Data WA catalogue for access to newer surveys at this site.
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This dataset is a compilation product of all publicly available surveyed bathymetry within the Australian Marine Parks (AMPs, 2025 boundaries), merged into a single multi-resolution composite per AMP. The data was compiled by Seamap Australia as part of an Our Marine Parks (Parks Australia) project with funding from the Australian Government to improve knowledge relating to classification of the Australian Marine Parks real estate. This compilation of bathymetry data was the first step in generating geomorphometry classifications (see https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/40e9283b-d4ed-4176-8fe6-112b8697003f for derived geomorphometry maps). Bathymetry data was collated from AusSeabed data holdings (https://portal.ga.gov.au/persona/marine), the WA Bathymetry Portal (https://dot-wa.maps.arcgis.com/apps/webappviewer/index.html?id=d58dd77d85654783b5fc8c775953c69b), the Australian Ocean Data Network (https://portal.aodn.org.au/) and other existing public data repositories. A single multi-resolution bathymetry mosaic, and associated multi-resolution hillshade mosaic, was generated for each AMP. Data is supplied as a single Web Map Service of bathymetry on hillshade for the mapped regions. Data is available for download as (1) bathymetry, and (2) hillshade, Geotiff files for each AMP. The table below indicates the Parks included in this data package, and the percent coverage of bathymetric data for each. Parks not expressly listed below had no publicly accessible bathymetry data available from the sources listed in the 'lineage' section below. This dataset was last updated on 10/12/2025 and represents all public bathymetry data intersecting AMPs that could be located as of that date. PARK....................................................% COVERAGE Abrolhos...............................................56% Apollo*.................................................100% (63%) Arafura.................................................11% Argo-Rowley Terrace............................34% Arnhem.................................................<1% Ashmore Reef*.....................................100% (68%) Beagle*.................................................100% (56%) Boags*..................................................100% (31%) Bremer..................................................71% Carnarvon Canyon...............................82% Cartier Island*......................................100% (9%) Central Eastern*...................................48% (42%) Christmas Island*.................................44% (41%) Cocos (Keeling) Islands*......................23% (20%) Cod Grounds........................................98% Coral Sea*...........................................100% (30%) Dampier................................................61% East Gippsland.....................................100% Eastern Recherche...............................37% Eighty Mile Beach.................................69% Flinders*...............................................36% (32%) Franklin*...............................................100% (51%) Freycinet*.............................................60% (59%) Gascoyne.............................................67% Geographe...........................................25% Gifford*.................................................100% (70%) Great Australian Bight...........................40% Gulf of Carpentaria................................6% Heard & McDonald Islands*†...............100% (3%) Hunter...................................................90% Huon.....................................................95% Jervis...................................................100% Joseph Bonaparte Gulf*......................100% (0%) Jurien...................................................20% Kimberley*...........................................100% (14%) Lord Howe*..........................................16% (14%) Macquarie Island..................................100% (47%) Mermaid Reef.......................................83% Montebello............................................89% Murray..................................................50% Nelson..................................................62% Ningaloo...............................................55% Norfolk..................................................39% Oceanic Shoals*..................................100% (26%) Perth Canyon......................................100% Roebuck..............................................100% Shark Bay............................................16% Solitary Islands....................................100% South Tasman Rise..............................82% South-west Corner...............................53% Tasman Fracture..................................99% Twilight.................................................1% Two Rocks...........................................34% Wessel..................................................1% West Cape York*..................................100% (11%) Western Eyre........................................27% Western Kangaroo Island.....................6% Zeehan.................................................73% * indicates Digital Elevation Model (DEM) data was included in compilation. Coverage of surveyed (non-modelled) bathymetry is shown in parentheses () † has been included in analysis but is not an Australian Marine Park
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Dataset collected at Cape Evans, Antarctica, November 2023 as part of a long-term NIWA benthic monitoring program under the Antarctica New Zealand event number K882A. The dataset includes multiple sea-ice and seafloor hyperspectral imaging transects (10-40 meters long) coupled with normal red, green, and blue (RGB) imagery from a dual camera machine vision system. The data were acquired using the remotely operated vehicle (ROV) HIcyBot system, funded by the Australian Centre for Excellence in Antarctic Research (ACEAS). A GNSS-integrated USBL transponder equipped onto the ROV allowed every frame of the high frequency hyperspectral imager to be timestamped via GPS clock to acoustically provided underwater position and attitude. The dataset also includes hyperspectral imaging scans of sampled/retrieved organisms found at the seafloor, to support habitat mapping algorithm development (e.g., algae, urchins, sea-stars, etc.). The ROV was tested as part of an ACEAS Program 2 subcomponent that involved the design of the new under-ice hyperspectral imaging and photogrammetric payload mounted onto the HIcyBot ROV. The overarching goal of the systems was to be able to acquire information of under the sea-ice sympagic and benthic communities (e.g., biomass and photophysiology) and deliver a multi-scale array of biophysical data that can be assimilated with known information in the region and monitor fine-scale change. Through the analysis of new and existing bio-optical under-ice data, the dataset aims to ultimately envisions the delivery of new monitoring tools and algorithms that can provide support for modelling efforts and reveal complex biophysical processes under a changing Antarctic Sea ice. ***NOTE: Data processing is still underway (April 2025). Please contact Emiliano.Cimoli@utas.edu.au for access to data.***
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This record provides an overview of the NESP Marine and Coastal Hub Research Plan 2023 project "Assessing changes in black rockcod abundance and size". For specific data outputs from this project, please see child records associated with this metadata. -------------------- The black rockcod (Epinephelus daemelii) is a long-lived, reef-dwelling species listed as Vulnerable under Commonwealth and NSW legislation. In Australia it occurs along the coast of New South Wales, including at Lord Howe Island. Although protected from fishing in NSW since 1983, the species is vulnerable to illegal take, incidental capture, barotrauma-related mortality, and degradation of nursery habitats. Long-term monitoring is a high priority for assessing whether recovery actions and spatial protections are improving population status. This project repeated the broadscale baseline survey of black rockcod across northern NSW and Lord Howe Island, extending a monitoring program that began in 2009–2011 and included smaller key-site surveys every four to five years. Divers surveyed reef sites, photographed and filmed individual fish, recorded habitat and depth, and estimated fish lengths, including with stereo-video where possible. Additional local field capability was built through Indigenous engagement and community-based monitoring activities. These survey outputs contributed to a 15-year time series (2009-2024) on abundance, occupancy, size structure, habitat associations, and spatial distribution of black rockcod. The results indicated continued low abundance across the species’ surveyed range, while also identifying larger mature individuals and higher abundances in some no-take sanctuary zones. The long-term dataset provided evidence for assessing recovery actions and sanctuary zone effectiveness, informs future monitoring priorities, and supports potential reassessment of the species’ threatened status. Outputs • Black rockcod underwater visual census (UVC) data [dataset] • Final project report [written]