*

Banded Morwong (2018)

Cheilodactylus spectabilis

  • Klaas Hartmann (Institute for Marine and Antarctic Studies, University of Tasmania)
  • Corey Green (Victorian Fisheries Authority)
  • Jeremy Lyle (Institute for Marine and Antarctic Studies, University of Tasmania)

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

Toggle content

Summary

Banded Morwong is a large temperate reef species sold in the domestic live fish trade. It is found in VIC where its stock status is classified as recovering and in TAS where it is depleting.  

Toggle content

Stock Status Overview

Stock status determination
Jurisdiction Stock Fisheries Stock status Indicators
Tasmania Tasmania Banded Morwong Fishery TBMF Depleting Stock assessment, CPUE
TBMF
Tasmanian Banded Morwong Fishery (TAS)
Toggle content

Stock Structure

Banded Morwong is large temperate reef fish species that is targeted by gillnets for the domestic live fish trade. The species is distributed around south eastern Australia, including southern New South Wales, and eastern Victoria and Tasmania, as well as occurring off north eastern New Zealand. It is relatively common in depths of less than 50 m. There is currently no information available regarding the biological stock structure. However, once settled after a relatively long oceanic larval phase, they show a high degree of site fidelity [Buxton et al. 2010, Murphy and Lyle 1999, Ziegler et al. 2006], suggesting that the exploited Victorian and Tasmanian populations are likely to represent distinct populations.

Here, assessment of stock status is presented at the management unit level—Victoria Banded Morwong Fishery and Tasmania Banded Morwong Fishery.

Toggle content

Stock Status

Tasmania Banded Morwong Fishery

From the commencement of the fishery in the 1990s the biomass has steadily declined through to 2017. A CASAL stock assessment model is applied to this fishery incorporating fisheries dependent logbook data and biannual fisheries independent age-frequency data [Moore et. al. 2018]. This model estimates biomass at 38 per cent as compared to a 30 per cent limit reference point [Moore et. al. 2018]. The above evidence indicates that the biomass of this stock is not likely to be depleted and that recruitment is currently unlikely to be impaired.

The CPUE reached a record low in 2012–13 and has slowly increased since with the exception of 2016–17. As a measure of abundance, CPUE is only reflective of a small range of age classes as older fish tend to move offshore, where they are not susceptible to the fishery. For the total spawning stock biomass, the stock assessment model indicates that fishing pressure at current levels will continue to deplete the stock with an 18 per cent chance of falling below the 30 per cent limit reference point within five years [Moore et. al. 2018]. The above evidence indicates that the current level of fishing mortality is likely to cause the stock to become recruitment impaired.

On the basis of the evidence provided above, the Tasmania Banded Morwong Fishery management unit is classified as a depleting stock.

Toggle content

Biology

Banded Morwong biology [Ewing et al. 2007, Ziegler et al. 2007]

Biology
Species Longevity / Maximum Size Maturity (50 per cent)
Banded Morwong 96 years, 578 mm FL 2.5 years, 320 mm FL 
Toggle content

Distributions

Distribution of reported commercial catch of Banded Morwong

Toggle content

Tables

Fishing methods
Tasmania
Commercial
Gillnet
Unspecified
Recreational
Spearfishing
Gillnet
Management methods
Method Tasmania
Commercial
Effort limits
Limited entry
Seasonal closures
Size limit
Total allowable catch
Recreational
Bag limits
Seasonal closures
Size limit
Active vessels
Tasmania
21 in TBMF
TBMF
Tasmanian Banded Morwong Fishery (TAS)
Catch
Tasmania
Commercial 32.71t in TBMF
Indigenous No Catch
Recreational 0.5 t (2012–13)
TBMF
Tasmanian Banded Morwong Fishery (TAS)

Commercial catch of Banded Morwong - note confidential catch not shown

Toggle content

Catch Chart

Commercial catch of Banded Morwong - note confidential catch not shown

Archived reports

Click the links below to view reports from other years for this fish.