A pilot management program to maximise Tasmania's Sea Urchin (Heliocidaris erythrogramma) resource: Hope Island, urchin density manipulations

The main aim of this research program was to determine the potential for reducing the density of urchins to encourage the return of seaweeds and an improvement in urchin roe quality and quantity from remaining urchins. Tasmanian Sea Urchin Developments used two widely-separated sub-tidal experimental lease areas. One of these areas was at Meredith Point, on the east coast, and the other at Hope Island, on the south coast. Both sites had been subject to some overgrazing by urchins. At Meredith Point, the study area was divided into plots containing urchins at three densities: artificially enhanced, continually harvested and control (undisturbed). At Hope Island, controlled clearings of urchins and limpets from barrens areas were conducted. Recovery of vegetation was monitored as well as urchin roe quality and quantity. The data represented by this record was collected at Hope Island, and includes results from an inital survey collected at the site before the main study commenced.

Cite as: Australian Ocean Data Network. A pilot management program to maximise Tasmania's Sea Urchin (Heliocidaris erythrogramma) resource: Hope Island, urchin density manipulations. https://data.gov.au/data/dataset/a-pilot-management-program-to-maximise-tasmanias-sea-urchin-heliocidaris-erythrogramma-resource5

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