The aim of this study is to use artificial boulders in the form of sandstone blocks to investigate the benthic cryptofaunal communities of subtidal rocky reefs; specifically to quantify temporal and spatial patterns, the influence of the sub-block reef profile, and protection from fishing on these animals at locations inside and external to the Maria Island marine reserve in eastern Tasmania.

Australia is home to a quarter of the world’s cartilaginous fishes (Class Chondrichthyes) with 328 species consisting of 182 sharks, 132 rays, and 14 chimaeras. Australia’s first Shark Action Plan aims to provide a comprehensive and consistent review of the extinction risk of all cartilaginous fishes (hereafter ‘sharks’) occurring in Australian waters, to provide a benchmark from which changes in population and risk can be measured, and to help guide management for their conservation. This Action Plan also serves to raise the profile of their diversity and conservation needs. This volume includes a taxa profile for each of the 328 species occurring in Australian marine and inland waters, including external territories. Each species’ extinction risk was assessed by applying the IUCN Red List Categories and Criteria at the national level. Assessments of extinction risk consider all available information on a species’ taxonomy, distribution, population status, habitat and ecology, major threats, use and trade, and conservation measures. The IUCN Red List Categories and Criteria utilise a series of thresholds to evaluate extinction risk based on population size reduction, geographic range, population size, or the probability of extinction. Species were assessed against the five Red List criteria; to qualify for one of the three threatened categories (Critically Endangered, Endangered, or Vulnerable), a species had to meet a quantitative threshold for that category in any of the five criteria. The overall status of sharks in Australia is characterised by a relatively low level of extinction risk and a high level of secure species. Of the 328 species, 12% are threatened (39 species: 22 sharks, 17 rays; no chimaeras are threatened); 10% are Near Threatened (32 species: 18 sharks, 13 rays, 1 chimaera); 70% are Least Concern (231 species: 123 sharks, 95 rays, 13 chimaeras); and, 8% are Data Deficient (26 species: 19 sharks, 7 rays, no chimaeras are Data Deficient). No species are Extinct or Extinct in the Wild. Each taxa profile specifies two sets of actions for a species: actions to address knowledge gaps, and actions to maintain, secure, and if necessary, recover the population. To improve the ability to accurately assess the status of species, and ultimately, better conserve and manage them, all species treated in this Action Plan require some knowledge gaps be filled. Knowledge gaps are divided into five themes, each of which improves the information base from which to assess status: taxonomy, distribution, population trend, life history, and connectivity. Conservation actions are provided for each species, regardless of the status assigned them in this Action Plan. While threatened species require immediate action to conserve, manage, and recover their populations, Least Concern species also require action to maintain their secure status. Data Deficient species require action to understand various aspects of their population, but since an assessment as Data Deficient acknowledges the possibility that future research may show that a threatened classification is appropriate, action is also needed to minimise or mitigate threats until such time as more information is available to show that the species is not threatened. Finally, an overarching recommendation is provided for each threatened species. This includes the recommendation that five species be considered for listing on the Environment Protection and Biodiversity Conservation Act (EPBC Act), three species be considered for up-listing, and two species be considered for down-listing. An additional 12 threatened species have been identified as priorities for data collection where further data are required to strengthen the evidence-base underlying their status determinations. These species are priorities for research and monitoring to provide data to support inferred or suspected population reductions or continuing declines identified in the Action Plan. The implementation of the recommendations and actions in this Action Plan will require an ongoing and enhanced investment in science and management which will help secure the future of Australia’s sharks, rays, and chimaeras.

This record provides an overview of the scope and research output of the NESP Marine Biodiversity Hub project "Grey Nurse Shark CK-MR Population Estimate – East Coast". For specific data outputs from this project, please see child records associated with this metadata. -------------------- A review of the 2002 National Recovery Plan for Grey Nurse Shark (DEWHA 2009) concluded it was not possible to determine if the east coast population had shown any signs of recovery (DoE 2014); recommending a new recovery plan be developed for this species. A primary objective of the new recovery plan (DoE 2014) is to improve knowledge of GNS population status. This will require a robust estimate of population size and trend – something that has not been provided to date. This project will use genetic SNP data to inform close kin-mark recapture analysis to estimate population size and trend, and provide guidance on future monitoring strategies for the east coast population of grey nurse shark. Planned Outputs • Tools to refine and integrate CK-MR and species demographic data for population assessments of a key threatened species at a national scale (combining knowledge developed under this project combined with similar techniques being applied under NESP to euryhaline sharks and white sharks). • A national estimate of (census) population size and trend for the eastern Australian population of grey nurse shark will be developed to fulfil the highest priority actions of the National Recovery Plan. • Identify national strategies to guide future monitoring of grey nurse shark populations. • The project will provide peer-reviewed additions to the scientific literature that will add to the science-support for the development and implementation of policies to support the ecologically sustainable management of Australia’s marine environment.

NESP Marine Biodiversity Hub Project C2 involved integration and analysis of three existing monitoring datasets: the Reef Life Survey (RLS), IMAS Long-term MPA (LTMPA), and AIMS Long-term (AIMS LTM) monitoring programs. These analyses involved generating new derived data on indicator values for survey sites in each of the datasets, which have been reported in the 2016 State of the Environment (SoE) report. Indicators included the biomass of large fishes, the community temperature index, the proportion of invasive species, crown-of-thorns seastar density and the proportion of threatened species. Details of calculation of these indicators and summary of trends in values across sites and times are provided in detail in a manuscript currently in the review process for an international journal [RSS to provide publication details once available], as well as in metadata supplied for the State of the Environment report. This metadata record provides links to each of the three datasets used in the synthesis, and links to access the derived biological indicator data reported in the 2016 SoE report. See "On-Line Resources" section.

This record provides an overview of the scope of the NESP Marine Biodiversity Hub project "Conservation status of tropical inshore dolphins". No data outputs were generated by this project. -------------------- This project reviewed current knowledge on Australia’s tropical inshore dolphins to inform future assessment of their conservation status. It focused on the Australian humpback dolphin (Sousa sahulensis), snubfin dolphin (Orcaella heinsohni), Indo-Pacific bottlenose dolphin (Tursiops aduncus) and the spinner dolphin (Stenella longirostris) complex. The project was undertaken as a desktop review of peer-reviewed literature, research projects and reports, including environmental impact assessments associated with major port developments from 2013 to 2019. It synthesised available information on species distribution, abundance, trends, habitat use, population structure and anthropogenic threats. The review found that knowledge had improved for several tropical inshore dolphin species, but was uneven across regions and species. Available data were largely concentrated in discrete study areas, limiting national-scale assessment. Identified threats included habitat loss and degradation associated with coastal development, bycatch in fishing gear and shark nets, and climate change impacts such as ocean warming, acidification and extreme weather events. Key recommendations included the use of scenario modelling and sensitivity analysis to support assessment of national population size and conservation status under uncertainty.

This record provides an overview of the scope and research output of the NESP Marine Biodiversity Hub project "Exploring the status of Western Australia’s sea snakes". For specific data outputs from this project, please see child records associated with this metadata. -------------------- All sea snakes are listed marine species under the EPBC Act and three Australian endemic species are listed as Critically Endangered or Endangered, and as such are a national conservation priority. This project examines existing data from the northwest marine region to define sea snake relative abundance and distribution patterns, including within CMRs, to refine species status. Synthesis of existing data will be useful to DOE, DPaW, Parks Australia and others. This analysis will help establish baseline data, guide future research, define abundance in and use of CMRs and refine EPBC listings and recovery plans. Planned Outputs • A report outlining the presence and relative abundance of sea snakes in northwestern Australia with a focus on reef and shoal habitats including identification of BIAs or key habitats where possible. Research and management priorities will be highlighted. • Presentation of results to key stakeholders and end users • Presentation of recommendations at scientific conferences • Communication of findings to the broader community via social media

This record provides an overview of the scope and research output of the NESP Marine Biodiversity Hub project "Shark action plan". For specific data outputs from this project, please see child records associated with this metadata. -------------------- Sharks, rays and chimaeras are increasingly recognised as conservation priorities in Australia and globally, with several species affected by overexploitation, bycatch, habitat pressures, and climate change. Considering common threats and data gaps across these taxa can support more consistent conservation assessment, policy and management. This project produced two major publications to strengthen the evidence base for shark, ray and chimaera conservation in Australia. The Shark Action Plan Policy Report 2018 reviewed extinction risk, distribution, data gaps, priority assessment needs, common threats, climate change research, and policy issues for internationally listed and Conservation Dependent species. The Action Plan for Australian Sharks and Rays 2021 assessed the national extinction risk of Australia’s 328 shark, ray and chimaera species using International Union for Conservation of Nature criteria. Assessments considered available information on taxonomy, distribution, population status, habitat, ecology, threats, use and trade, and conservation measures. The project provided a national benchmark for tracking future changes in species status, identified species requiring further research, and recommended conservation objectives for each species. Outputs support threatened species listing processes, fisheries and conservation management, and policy development at Commonwealth, state and territory levels.

This record provides an overview of the scope and research output of the NESP Marine Biodiversity Hub project "A standardised national assessment of the state of coral and rocky reef biodiversity". For specific data outputs from this project, please see child records associated with this metadata. -------------------- This project will involve integration of a national suite of reef biota Underwater Visual Census (UVC) monitoring datasets (Reef Life Survey (RLS), University of Tasmania (UTAS), Australian Institute for Marine Science (AIMS), Parks Victoria (PV), SA Department of environment, water and natural resources (DEWNR)) to provide a comprehensive update to the state of Australian Reefs report for the next national State of the Environment Report. Maps and indicator trends will show changes in the health of rocky and coral reefs nationally from 2005 to 2020. The update will include addition of a new index which summarises the population trajectories for 600-1000 reef species nationally. Individual species trajectories will provide the only threat status information for the majority of these species, assisting future listing of previously unassessed species if significant declines are detected. Planned Outputs • Maps and trends in SoE indicators • Raw data underlying SoE analyses (data use agreement must be signed with AIMS for access to that data) • Various scientific papers

This record provides an overview of the scope and research output of the NESP Marine Biodiversity Hub project "Canyon mapping & biodiversity in Gascoyne Marine Park". For specific data outputs from this project, please see child records associated with this metadata. -------------------- Very little is known about the deep waters of Australia’s marine parks. Recent NESP-supported surveys have targeted eastern abyssal depths and Tasmanian seamounts (NESP Project D4), but there have been no similar efforts in Western Australia. To counter this information deficit, we plan to actively map and sample two significant and biologically unexplored submarine canyons (Cape Range and Cloates Canyon) in the habitat protection and multiple use zones of the Gascoyne Marine Park. Standard operating procedures for marine sampling (multibeam, survey design) will be followed, with other sampling platforms (e-DNA, ROV) informing future SOPs (NESP Project D2). Planned Outputs • ROV image library (to be archived with the Australian Marine Imagery Collection at NCI) • Derived bathymetric products (to be made available through Geoscience Australia website and linked to relevant portals, including the Marine Park Atlas and North-West Atlas) • Taxonomic identifications and associated metadata (to be made available online through Atlas of Living Australia (ALA) web portal) • Sanger genetic sequences and e-DNA sequences (to be lodged in databases such as NCBI’s Genbank, short read archive or DataDryad) • Multibeam data will be processed into bathymetric grids at Geoscience Australia and made available via the AusSeabed portal

This record provides an overview of the scope of the NESP Marine Biodiversity Hub project "Identification of near-shore habitats of juvenile white sharks in south-western Australia". No data outputs were generated by this project. -------------------- In 2018, CSIRO provided the first estimate of adult abundance for the southern-western Australian white shark (Carcharodon carcharias) population. At the time, total population abundance could not be estimated because of limited information on the juvenile life-history stage. This project investigated whether juvenile white sharks from this population use near-shore habitats near the head of the Great Australian Bight. It investigated credible anecdotal evidence of juvenile white shark presence in the region and was designed as a pilot study to inform future survey and project development. The project reviewed existing sources of evidence and undertook unmanned aerial vehicle (AUV) surveys in near-shore habitats within and around the Nuyts Archipelago Marine Park. Thirty-five UAV flights were completed during 2018 and 2019, covering approximately 7.5 km². No white sharks were identified in the UAV footage, although several other marine species and shorebirds were observed. Additional evidence from scientific surveys indicated that the Head of Bight and surrounding marine park areas may be important habitat for white sharks across multiple life stages. The project included engagement with the Yalata Land Management Indigenous Ranger team, who were consulted during project planning and survey activities. The findings informed future project development by assessing the value of further on-water activities, expanded UAV surveys and targeted monitoring in the Great Australian Bight region.