This project uses positional information from GPS loggers on abalone divers' boats and depth information from depth loggers attached to the divers for fine-scale spatial reporting of abalone fishing.

Characterisation of lobster (Jasus edwardsii) abundance and change in abundance at three different sampling sites (Cape Paul Lemanon, North Bay and Fortescue Bay) on the south-east coast of Tasmania, was assessed by GPS tracked SCUBA diver swims of 60 minutes in length whereby GPS was logged approximately every 5 seconds. Large tagged Rock Lobsters were introduced into one of the sampling sites, North Bay (which was closed to fishing). The swims are also being used to assess the impact of reef closure on the local lobster population.

The survey comprises two streams of data, including (1) the availability of different attachment sites and (2) the algal composition of abalone attachment sites ('homesites'). The survey was conducted at three sites at each of three regions on the east coast of Tasmania.

This data is primarily benthic invertebrate community information including species abundance & distribution collected by diver coring/grab. Spatial information is available for D'Entrecasteaux Channel, Huon River, North West Bay and Port Esperance sites. Associated physical chemical parameters (sediment grain size, redox, sulphide, depth) were also collected and, in most cases, includes spatial GPS references.

Timed GPS-tracked swims using SCUBA (45 and 30 minutes), were used to assess the changes in frequency and size of Centrostephanus rodgerii incipient barrens in eastern Tasmania. The number of C. rodgerii and Heliocidaris erythrogramma in each incipient barren were also assessed.

Collected benthic community structure (species and abundance) and physical/chemical attributes (including sediment grain size, redox, sulphide and depth) for a large number of locations in the Huon and Derwent estuaries of south east Tasmania. Data was collected using van veen grab, divers where necessary or core samples. All locations include heavy metal data and site information. Most data was collected with spatial references (GPS).

This data is primarily benthic invertebrate community information including species abundance & distribution collected by diver coring/grab. Spatial information is available for Huon Estuary and Tasman Peninsula (Nubeena) sites. Associated physical chemical parameters (sediment grain size, redox, sulphide, depth) were also collected and, in most cases, includes spatial GPS references.

A photographic and in situ diver survey of marked incipient Centrostephanus rodgersii barren patches, in eastern Tasmanian, was used to assess any changes in the grazed area and shape at experimental (lobster translocation/ research reserve protection sites; and abalone diver urchin cull sites) versus control sites.