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Pale Octopus (2018)

Octopus pallidus

  • Bradley Moore (Institute for Marine and Antarctic Studies, University of Tasmania)
  • Mike Steer (South Australian Research and Development Institute)
  • Corey Green (Victorian Fisheries Authority)
  • Karina Hall (Department of Primary Industries, New South Wales)
  • Klaas Hartmann (Institute for Marine and Antarctic Studies, University of Tasmania)

You are currently viewing a report filtered by jurisdiction. View the full report.

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Summary

Pale Octopus is distributed from the Great Australian Bight around TAS to southern NSW. Stock status is classified as sustainable in Tasmania, negligible in NSW and SA, and undefined in VIC.

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Stock Status Overview

Stock status determination
Jurisdiction Stock Fisheries Stock status Indicators
Tasmania Tasmania TOF Sustainable Catch, effort, CPUE, potlift surveys
TOF
Tasmanian Octopus Fishery (TAS)
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Stock Structure

Pale Octopus is distributed from the Great Australian Bight around Tasmania to southern New South Wales. There is evidence to suggest that Pale Octopus shows complex biological stock structure, with a number of discrete subpopulations in Bass Strait (less than 100 km apart) due to limited dispersal and isolation by distance [Doubleday et al. 2008, Higgins et al. 2013]. However, further information is required to confirm the overall stock structure across southern Australia.

Here, assessment of the stock status is presented at the jurisdictional level—New South Wales, Victoria, Tasmania and South Australia.

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Stock Status

Tasmania

In Tasmania, stock status of Pale Octopus is assessed using commercial catch and catch per unit effort (CPUE ; octopus per pot-lift). These are used as indicators of biomass and fishing mortality. A 50-pot sampling program has been conducted in the fishery since November 2004, whereby fishers are required to collect data on all octopuses caught in 50 randomly selected pots from a single line. This represents about 10 per cent of a standard commercial line.

Catch of Pale Octopus in the Tasmanian Octopus Fishery (TOF) has fluctuated around 60–100 t since 2005–06, reaching a high of 124.7 t in 2012–13. Catches of Pale Octopus were 84 t in 2016–17, consistent with the long-term average. Effort has fluctuated around 287 800 (± 21 420) pot-lifts between 2006–07 and 2011–12, before reaching a historical high of 448 000 pot-lifts in 2012–13. Effort in 2017 was largely consistent with the long-term average for the fishery, with 296 500 pot lifts recorded [Bradshaw et al. 2018].

Standardised CPUE  in the TOF, calculated using a general linear model from the total commercial catch and random 50-pot sampling program, has fluctuated at around 60–80 per cent of the reference period since 2012–13 [Bradshaw et al. 2018]. In the 2016–17 fishing year, CPU E from the commercial catch was approximately 66 per cent of the reference period, while the 50-pot sample CPU E was approximately 77 per cent of the reference period, the second-highest value since 2011–12.

The relative stability in catches, effort and catch rates over almost a decade indicates that the biomass of this stock is unlikely to be depleted and that recruitment is unlikely to be impaired. Furthermore, the current level of fishing mortality is unlikely to cause the stock to become recruitment impaired.

On the basis of the evidence provided above, Pale Octopus in Tasmania is classified as a sustainable stock.

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Biology

Pale Octopus biology [Leporati et al. 2007, Leporati et al 2008a, Leporati et al 2008b]

Biology
Species Longevity / Maximum Size Maturity (50 per cent)
Pale Octopus 1.5 years, 1200 g Females 473 g, Males < 250 g
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Distributions

Distribution of reported commercial catch of Pale Octopus
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Tables

Fishing methods
Tasmania
Commercial
Octopus Traps And Pots
Indigenous
Spearfishing
Hand collection
Coastal, Estuary and River Set Nets
Rock Lobster And Crayfish Traps And Pots
Recreational
Spearfishing
Hand collection
Coastal, Estuary and River Set Nets
Rock Lobster And Crayfish Traps And Pots
Management methods
Method Tasmania
Commercial
Gear restrictions
Limited entry
Indigenous
Bag and possession limits
Bag limits
Recreational
Bag and possession limits
Bag limits
Active vessels
Tasmania
2 in TOF
TOF
Tasmanian Octopus Fishery (TAS)
Catch
Tasmania
Commercial 83.98t in TOF
Indigenous Unknown
Recreational 1 143 unspecified octopus landed in 2012–13
TOF
Tasmanian Octopus Fishery (TAS)

Victoria – Commercial (catch) Pale Octopus is not differentiated from other octopuses caught in Victorian commercial fisheries.

Victoria – Indigenous In Victoria, regulations for managing recreational fishing may not apply to fishing activities by Indigenous people. Victorian traditional owners may have rights under the Commonwealth's Native Title Act 1993 to hunt, fish, gather and conduct other cultural activities for their personal, domestic or non-commercial communal needs without the need to obtain a licence. Traditional Owners that have agreements under the Traditional Owner Settlement Act 2010 (Vic) may also be authorised to fish without the requirement to hold a recreational fishing licence. Outside of these arrangements, Indigenous Victorians can apply for permits under the Fisheries Act 1995 (Vic) that authorise fishing for specific Indigenous cultural ceremonies or events (for example, different catch and size limits or equipment). There were no Indigenous permits granted in 2017 and hence no Indigenous catch recorded.

Tasmania – Commercial (catch) Catches reported for the Tasmanian Octopus Fishery are for the period 1 March to end of February the following year. The most recent assessment available is for 2016–17.

Tasmania – Commercial (management methods) A possession limit of 100 kg of octopus per day (all species combined) is in place for holders of a fishing licence (personal) and a scalefish licence.

Tasmania – Recreational (management methods) In Tasmania, a recreational licence is required for fishers using rock lobster pots, along with nets, such as gillnet or beach seine. A bag limit of five octopus and a possession limit of ten octopus (all species combined) is in place for recreational fishers.

Tasmania – Indigenous In Tasmania, Indigenous persons engaged in aboriginal fishing activities in marine waters are exempt from holding recreational fishing licences, but must comply with all other fisheries rules as if they were licensed. Additionally, recreational bag and possession limits also apply. If using pots, rings, set lines or gillnets, Indigenous fishers must obtain a unique identifying code (UIC). The policy document Recognition of Aboriginal Fishing Activities for issuing a UIC to a person for Aboriginal Fishing activity explains the steps to take in making an application for a UIC.

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Catch Chart

Commercial catch of Pale Octopus - note confidential catch not shown
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References

  1. Bradshaw, S, Moore, B and Hartmann, K 2018, Tasmanian Octopus Fishery Assessment 2016/17, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, Tasmania.
  2. Doubleday, ZA, Pecl, GT, Semmens, JM and Danyushevsky, L 2008, Stylet elemental signatures indicate population structure in a holobenthic octopus species, Octopus pallidus, Marine Ecology Progress Series, 371: 1–10.
  3. Hall, KC 2015, Octopus (Octopus spp.), in Stewart, J, Hegarty, A, Young, C, Fowler, AM and Craig, J (ed.s), Status of fisheries resources in NSW 2013–14, NSW Department of Primary Industries, Mosman, pp 231–234.
  4. Higgins, KL, Semmens, JM, Doubleday, ZA and Burridge, CP 2013, Comparison of population structuring in sympatric octopus species with and without a pelagic larval stage, Marine Ecology Progress Series, 486: 203–212.
  5. Leporati, SC, Pecl, GT and Semmens, JM 2007, Cephalopod hatchling growth: The effects of initial size and seasonal temperatures, Marine Biology, 151: 1375–1383.
  6. Leporati, SC, Pecl, GT and Semmens, JM 2008a, Reproductive status of Octopus pallidus, and its relationship to age and size, Marine Biology, 155: 375–385.
  7. Leporati, SC, Semmens, JM and Pecl, GT 2008b, Determining the age and growth of wild octopus using stylet increment analysis, Marine Ecology Progress Series, 367: 213–222.
  8. NSW DPI unpublished, NSW stock status summary 2018: Octopuses (Octopus australis, Macroctopus maorum, O. tetricus and O. pallidus), NSW Department of Primary Industries, Coffs Harbour.