Abalone fishing block 30 - High resolution acoustic data of reef habitat

The principle aim of this project was to map the fine-scale spatial distribution of key abalone habitat impacted by urchins in < 25 m water depth using multibeam acoustic imagery. Detailed substrate type (Pavement Reef, Megaclast Reef, Mixed Consolidated Sediment/Reef and Sand), and kelp coverage maps have been produced for the east coast of Tasmania. Large urchin barrens have been predicted and the minimum quantifiable unit of which small incipient barrens can be detected has been identified using this acoustic water column technique.This data provides a snapshot of the 2021 distribution of seafloor habitats and associated vegetation distribution, and will assist in the facilitation of strategic decision making for urchin control and abalone management.Data for download has been split by fishing block (22-24, 27-30). This record describes *FISHING BLOCK 30*. The following data products are available for download, for each fishing block:• 50cm resolution bathymetry• 50cm resolution substrate type (Seamap Australia classification)• bathymetry derivatives (seabed slope, curvature, rugosity, 1 and 2m contours)• water column data - 1m mean signal• water column data - 9m2 raw block statistic• water column data - vegetation likelihood classificationSee associated records for access to data from other fishing blocks (22, 23, 24, 27, 28, 29).