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Goldband Snapper (2018)

Pristipomoides multidens

  • Thor Saunders (Department of Primary Industry and Resources, Northern Territory)
  • Amanda Dawson (Department of Agriculture and Fisheries, Queensland)
  • Fabian Trinnie (Department of Primary Industries and Regional Development, Western Australia)
  • Stephen Newman (Department of Primary Industries and Regional Development, Western Australia)

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Summary

Goldband Snapper is widely distributed through northern Australia. There are five stocks across WA, the NT and QLD. All are sustainable apart from the stock off the Queensland east coast, which is undefined.

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Stock Status Overview

Stock status determination
Jurisdiction Stock Fisheries Stock status Indicators
Western Australia Gascoyne GDSMF, WCDSIMF Sustainable Age structure, catch, fishing mortality
Western Australia Kimberley NDSMF Sustainable Biomass, age structure, catch, fishing mortality, CPUE
Western Australia Pilbara PFTIMF, PLF, PTMF Sustainable Age structure, catch, fishing mortality
GDSMF
Gascoyne Demersal Scalefish Managed Fishery (WA)
NDSMF
Northern Demersal Scalefish Managed Fishery (WA)
PFTIMF
Pilbara Fish Trawl (Interim) Managed Fishery (WA)
PLF
Pilbara Line Fishery (WA)
PTMF
Pilbara Trap Managed Fishery (WA)
WCDSIMF
West Coast Demersal Scalefish (Interim) Managed Fishery (WA)
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Stock Structure

Goldband Snapper is widely distributed throughout northern Australia and the tropical Indo–West Pacific. Ovenden et al. [2002] examined the genetic connectivity of Goldband Snapper using mitochondrial DNA from samples collected at six Australian locations (four in Western Australia: Exmouth, Pilbara, Broome, Northern Kimberley; two in the Northern Territory: Timor Sea, Arafura Sea) and three south east Asian locations (Kupang, Irian Jaya, Madang). The mitochondrial DNA data for Goldband Snapper did not differ genetically among Australian locations, except for the northern Kimberley location that exhibited restricted gene flow. Ovenden et al. [2002] reported that samples taken from locations in Southeast Asia were genetically distinct from those sampled from Australian locations. This study indicates that Australian populations of Goldband Snapper are likely to form a single biological stock.

Newman et al. [2000] examined otolith stable isotopes in each of three management regions in Western Australia (Kimberley, Pilbara and Gascoyne), and across northern Australia. Significant differences in stable isotope ratios provided evidence that there was limited mixing of adult Goldband Snapper between all sites sampled in Australia, Indonesia and Papua New Guinea. Therefore, each of these broad locations could be treated separately for the purposes of fishery management, if management arrangements were mediated in a way that harmonized with the spatial patterns of exploitation. The study of Newman et al. [2000] indicates that Goldband Snapper is likely to consist of a number of separate management units around western, northern and eastern Australia. 

Here, assessment of stock status is presented at the management unit level—Kimberley, Pilbara, Gascoyne (Western Australia); Northern Australia (Northern Territory and Queensland); and East Coast Queensland.

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Stock Status

Gascoyne

The stock assessment for Goldband Snapper in the Gascoyne management unit is based on an assessment of fishing mortality derived from catch curve analysis of representative samples of the age structure in the Gascoyne Demersal Scalefish Managed Fishery (GDSMF, Western Australia). These fishing mortality-based assessments use reference levels that are based on ratios of natural mortality for each species: such that Ftarget = 2/3M, Fthreshold = M and Flimit = 3/2M [DPIRD 2017]. An assessment of fishing mortality for Goldband Snapper was undertaken in the GDSMF in 2017. The fishing mortality based assessment and associated uncertainty ranges indicated that the fishing levels on Goldband Snapper in this management unit were less than the fishing mortality target level. This indicates that, on average, the level of exploitation experienced by Goldband Snapper in the Gascoyne has been low. The above evidence indicates that the biomass of this stock is unlikely to be depleted and that recruitment is unlikely to be impaired.

Goldband Snapper catches from the GDSMF (Gascoyne management unit) ranged from 240–311 tonnes (t) between 2002 and 2004 [Gaughan and Santoro 2018]. Catch levels from 2005–09 were lower, ranging between 105 and 144 t. Catch levels since 2010 have been much reduced, ranging from 33–78 t. The catch of Goldband Snapper in the GDSMF has been low and stable for the past five years (2013–17), ranging from 48–72 t, with a mean annual catch of 60.5 t. The above evidence indicates that the current level of fishing mortality is unlikely to cause the stock to become recruitment impaired.

On the basis of the evidence provided above, the Gascoyne (Western Australia) management unit is classified as a sustainable stock.

Kimberley

Goldband Snapper is exploited throughout its distribution in Western Australia. It is one of the indicator species used to assess the status of the demersal scalefish resources in the Kimberley subregion of the North Coast Bioregion of Western Australia [Newman et al. 2018b].

The major performance measures for Goldband Snapper in the Kimberley management unit are estimates of spawning stock levels in the Northern Demersal Scalefish Managed Fishery (Western Australia) (NDSMF) using an integrated age-structured stock assessment. The target level of spawning biomass is 40 per cent of the unfished (1980) level. The limit level is 30 per cent of the initial spawning biomass [DPIRD 2017]. The spawning biomass of Goldband Snapper was estimated to be approximately 35 per cent of the unfished level in the Kimberley management unit (i.e. between the target and the threshold reference levels) in 2015 (the year the last integrated assessment was undertaken) [Newman et al. 2018a]. The above evidence indicates that the biomass of this stock is unlikely to be depleted and that recruitment is unlikely to be impaired.

Fishing mortality based assessments indicated that the median level of fishing mortality on Goldband Snapper in this management unit were between the target and the threshold levels in 2015 [Newman et al. 2018a]. These fishing mortality based assessments utilise the fishing mortality rate reference levels defined above for the Gascoyne management unit. Goldband Snapper catches from the NDSMF (Kimberley management unit) over the last 10 years (2008–17) have been relatively stable, ranging between 400 and 523 t. The catch of Goldband Snapper in the NDSMF has also been relatively stable for the past five years (2013–17), ranging from 400–500 t, with a mean annual catch of 462 t. The above evidence indicates that the current level of fishing mortality is unlikely to cause the stock to become recruitment impaired.

On the basis of the evidence provided above, the Kimberley (Western Australia) management unit is classified as a sustainable stock.

Pilbara

A stock assessment for Goldband Snapper in the Pilbara management unit was undertaken in 2009, based on an assessment of fishing mortality derived from catch curve analysis of representative samples of the age structure in the Pilbara demersal scalefish fisheries (Pilbara Fish Trawl Interim Managed Fishery, Pilbara Line Fishery and Pilbara Trap Managed Fishery). These fishing mortality based assessments utilise the reference levels defined above for the Gascoyne management unit. The fishing mortality based assessments indicated that the estimated fishing level on Goldband Snapper in this management unit was either below the fishing mortality target level, or between the target and threshold levels in 2008, depending on the area of the fisheries [Newman et al. 2018a]. This indicates that fishing at that time was not having an unacceptable impact on the age structure of the population. Subsequently, assessment of the overall demersal fish resource in the region has been based on indicator species selected from the suite of demersal scalefish taken (based on their inherent vulnerability and overall risk to sustainability) [Newman et al. 2018a]. The levels of fishing mortality on the indicator species, Red Emperor, Rankin Cod and Bluespotted Emperor in the Pilbara subregion of the North Coast Bioregion of Western Australia [Newman et al. 2018b] overall, were either less than the target level or between the target and the threshold level.

Goldband Snapper catches from the Pilbara demersal scalefish fisheries (Pilbara management unit) over the last 10 years (2008–17) have ranged from 113–208 t. The catch of Goldband Snapper in the Pilbara demersal scalefish fisheries has been consistent and stable for the past five years (2013–17), ranging from 143–208 t, with a mean annual catch of 187 t. The above evidence 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, the Pilbara (Western Australia) management unit is classified as a sustainable stock.

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Biology

Goldband Snapper biology [Newman et al. 2001, Newman and Dunk 2003, Wakefield et al. unpublished data]
Biology
Species Longevity / Maximum Size Maturity (50 per cent)
Goldband Snapper 30 years, 700 mm FL, 810 mm TL 4.6 years, 417 mm FL , 526 mm TL
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Distributions

Distribution of reported commercial catch of Goldband Snapper
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Tables

Fishing methods
Western Australia
Commercial
Hand Line, Hand Reel or Powered Reels
Otter Trawl
Unspecified
Fish Trap
Charter
Hook and Line
Recreational
Hook and Line
Management methods
Method Western Australia
Charter
Bag limits
Limited entry
Passenger restrictions
Size limit
Spatial closures
Spatial zoning
Commercial
Effort limits
Gear restrictions
Limited entry
Spatial closures
Spatial zoning
Total allowable catch
Total allowable effort
Vessel restrictions
Recreational
Bag limits
Licence (Recreational Fishing from Boat License)
Possession limit
Size limit
Spatial closures
Active vessels
Western Australia
17 in Charter, 13 in GDSMF, 6 in NDSF, <3 in PFTIMF, 8 in PLF, <3 in PTMF, 5 in WCDSIMF
Charter
Tour Operator (WA)
GDSMF
Gascoyne Demersal Scalefish Managed Fishery (WA)
NDSF
Northern Demersal Scalefish Fishery (WA)
PFTIMF
Pilbara Fish Trawl (Interim) Managed Fishery (WA)
PLF
Pilbara Line Fishery (WA)
PTMF
Pilbara Trap Managed Fishery (WA)
WCDSIMF
West Coast Demersal Scalefish (Interim) Managed Fishery (WA)
Catch
Western Australia
Commercial 72.13t in GDSMF, WCDSIMF, 473.37t in NDSMF, 203.49t in PFTIMF, PLF, PTMF
Charter 12.29 t
Indigenous Unknown
Recreational 15.37 t ± 4.30 t se
GDSMF
Gascoyne Demersal Scalefish Managed Fishery (WA)
NDSMF
Northern Demersal Scalefish Managed Fishery (WA)
PFTIMF
Pilbara Fish Trawl (Interim) Managed Fishery (WA)
PLF
Pilbara Line Fishery (WA)
PTMF
Pilbara Trap Managed Fishery (WA)
WCDSIMF
West Coast Demersal Scalefish (Interim) Managed Fishery (WA)

Western Australia – Commercial (catch) Goldband Snapper forms part of the combined Total Allowable Commercial Catch for other mixed demersal species in the GDSMF.

Western AustraliaActive Vessels Data is confidential as there were fewer than three vessels operating in Pilbara Fish Trawl Interim Managed Fishery and Pilbara Trap Managed Fishery.

Western Australia – Recreational (Catch) Boat-based recreational catch is from 1 September 2015–31 August 2016. These data are derived from those reported in Ryan et al. 2017.

Western Australia – Recreational (management methods) A Recreational Fishing from Boat License is required for the use of a powered boat to fish or to transport catch or fishing gear to or from a land-based fishing location.

Western Australia – Indigenous (management methods)  Subject to the defence that applies under Section 211 of the Native Title Act 1993 (Cth), and the exemption from a requirement to hold a recreational fishing licence, the non-commercial take by indigenous fishers is covered by the same arrangements as that for recreational fishing.

Northern Territory – Charter (management methods) In the Northern Territory, charter operators are regulated through the same management methods as the recreational sector but are subject to additional limits on license and passenger numbers.

Northern Territory – Indigenous (management methods) The Fisheries Act 1988 (NT), specifies that “…without derogating from any other law in force in the Territory, nothing in a provision of this Act or an instrument of a judicial or administrative character made under it limits the right of Aboriginals who have traditionally used the resources of an area of land or water in a traditional manner from continuing to use those resources in that area in that manner”.

Queensland – Commercial (catch) For Queensland, the normal reporting period for the Coral Reef Fin Fish Fishery is financial year. The above commercial catch total listed above however is for calendar year (2017).

Queensland – Commercial (fishing methods) In Queensland, Goldband Snapper is trawled in only one of the Queensland fisheries in which it is caught commercially - the Gulf of Carpentaria Developmental Fin Fish Trawl Fishery.

Queensland – Indigenous Under the Fisheries Act 1994 (Qld), Indigenous fishers in Queensland are entitled to use prescribed traditional and non-commercial fishing apparatus in waters open to fishing. Size and possession limits, and seasonal closures do not apply to Indigenous fishers. Further exemptions to fishery regulations may be applied for through permits.

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Catch Chart

Commercial catch of Goldband Snapper - note confidential catch not shown
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References

  1. DPIRD 2017, North Coast demersal scalefish resource harvest strategy 2017–2021. Version 1.0. Fisheries Management Paper No. 285. Department of Primary Industries and Regional Development, Government of Western Australia, Perth, Australia. 35p.
  2. Gaughan, DJ and Santoro, K (eds.) 2018, Status Reports of the Fisheries and Aquatic Resources of Western Australia 2016/17: The State of the Fisheries. Department of Primary Industries and Regional Development, Western Australia, Perth, Australia. 237p.
  3. Newman, SJ and Dunk, IJ 2003, Age validation, growth, mortality and additional population parameters of the goldband snapper (Pristipomoides multidens) off the Kimberley coast of northwestern Australia, Fishery Bulletin, 101(1): 116–128.
  4. Newman, SJ, Brown, JI, Fairclough, DV, Wise, BS, Bellchambers, L.M, Molony, BW, Lenanton, RCJ, Jackson, G, Smith, KA, Gaughan, DJ, Fletcher, WJ, McAuley, RB and Wakefield, CB 2018, A risk assessment and prioritisation approach to the selection of indicator species for the assessment of multi-species, multi-gear, multi-sector fishery resources. Marine Policy 88: 11–22.
  5. Newman, SJ, Moran, MJ and Lenanton, RCJ 2001, Stock assessment of the outer-shelf species in the Kimberley region of tropical Western Australia, final report to the Fisheries Research and Development Corporation, project 97/136, Fisheries Western Australia, Perth.
  6. Newman, SJ, Steckis, RA, Edmonds, JS and Lloyd, J 2000, Stock structure of the goldband snapper, Pristipomoides multidens (Pisces: Lutjanidae) from the waters of northern and western Australia by stable isotope ratio analysis of sagittal otolith carbonate, Marine Ecology Progress Series, 198: 239–247.
  7. Newman, SJ, Wakefield, C, Skepper, C, Boddington, D, Jones, R and Smith, E 2018, North Coast Demersal Resource Status Report 2017. pp. 127–133. In: Gaughan, D.J. and Santoro, K. (eds.). Status Reports of the Fisheries and Aquatic Resources of Western Australia 2016/17: The State of the Fisheries. Department of Primary Industries and Regional Development, Western Australia, Perth, Australia. 237p.
  8. Northern Territory Government (NTG) 2018, Status of Key Northern Territory Fish Stocks Report 2016. Northern Territory Government. Department of Primary Industry and Fisheries. Fishery Report No. 119.
  9. Ovenden, JR, Lloyd, J, Newman, SJ, Keenan, CP and Slater, LS 2002, Spatial genetic subdivision between northern Australian and southeast Asian populations of Pristipomoides multidens: a tropical marine reef fish species, Fisheries Research, 59(1–2): 57–69.
  10. Ryan, KL, Hall, NG, Lai, EK, Smallwood, CB, Taylor, SM, Wise, BS 2017, Statewide survey of boat-based recreational fishing in Western Australia 2015/16. Fisheries research Report No. 287. Department of Primary Industries and Regional Development, Government of Western Australia, Perth. 
  11. Stock assessment of Goldband Snapper (Pristipomoides multidens) in the Northern Territory Demersal and Timor Reef Fisheries, unpublished report, Northern Territory Department of Primary Industry and Fisheries, Darwin.