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Brownlip Abalone (2018)

Haliotis rubra conicopora

  • Lachlan Strain (Department of Primary Industries and Regional Development, Western Australia)
  • Katherine Heldt (South Australian Research and Development Institute)

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Summary

Brownlip Abalone is found along Australia’s southwest coast. In WA there are two management areas, in one the stock is sustainable and in the other depleting. The stock in SA is undefined, with limited information available.

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Stock Status Overview

Stock status determination
Jurisdiction Stock Fisheries Stock status Indicators
South Australia South Australia Western Zone Fishery SAWZF Undefined
SAWZF
South Australia Western Zone Fishery (SA)
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Stock Structure

Brownlip Abalone is distributed from the south-west of Western Australia to the west of South Australia. Brownlip Abalone are endemic to the south-west of Australia, but there is evidence to suggest that they are genetically similar to, and potentially conspecific with, Blacklip Abalone (Haliotis rubra rubra) [Brown and Murray 1992], which are distributed east from Western Australia across southern mainland Australia to northern New South Wales and Tasmania. The biological stock structure of Brownlip Abalone has not been examined. As there is no genetic evidence to confirm biological stock structure of Brownlip Abalone, assessment of stock status is presented here at the management unit level—Western Australia Area 2 Fishery, Western Australia Area 3 Fishery and South Australia Western Zone Fishery.

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Stock Status

South Australia Western Zone Fishery

This species is rare in South Australia. In the catch returns of commercial fishers, Brownlip Abalone is not differentiated from Blacklip Abalone, which is classified as depleting. There is no reported catch of Brownlip Abalone by commercial or recreational fishers in South Australia. There is no published assessment of this species for the South Australia Western Zone Fishery (SAWZF), and there are no data available to estimate biomass or exploitation rates. In addition, there is no knowledge on recruitment or harvestable biomass, and there are no defined target or limit reference levels. This prevents assessment of current stock size or fishing pressure. Consequently, there is insufficient information available to confidently classify the status of this stock.

Based on the evidence provided above, the South Australia Western Zone Fishery management unit is classified as an undefined stock.

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Biology

Brownlip Abalone biology [Strain et al. 2017; Wells and Mulvay 1992]

Biology
Species Longevity / Maximum Size Maturity (50 per cent)
Brownlip Abalone 20 years, 220 mm SL 4–6 years, 110–130 mm SL 
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Distributions

Distribution of reported commercial catch of Brownlip Abalone

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Tables

Fishing methods
South Australia
Commercial
Diving
Indigenous
Diving
Recreational
Diving
Management methods
Method South Australia
Commercial
Limited entry
Size limit
Total allowable catch
Indigenous
Bag limits
Size limit
Recreational
Bag limits
Size limit
Catch
South Australia
Indigenous Unknown
Recreational Unknown