Orange roughy - Southwest Pacific|
Marine Resource Fact Sheet |
| | Orange roughy - Southwest Pacific |
| Data Ownership | This document provided, maintained and owned by South Pacific Regional Fisheries Management Organisation (SPRFMO) , is part of SPRFMO Stocks Status Reports data collection. |
| Monitoring periodThis marine resource is reported in FIRMS from 1989. Related observations | Locate in inventory | | Species: | FAO Names: en - Orange roughy, fr - Hoplostète orange, es - Reloj anaranjado, ru - Большеголов атлантический (=берикс исландский) |
Fishery IndicatorsProduction: Catch |
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| Geographic extent of Orange roughy - Southwest Pacific
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FAO Major Fishing Areas |
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81 | Pacific, Southwest |
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| Main Descriptors | Considered a single stock: No
Spatial Scale: Regional Management unit: Yes
Reference year: 2015
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Considered a single stock: A group of individuals in a species occupying a well defined spatial range independent of other stocks of the same species. It can be affected by random dispersal movements and directed migrations due to seasonal or reproductive activity. |
Spatial Scale: Spatial scale contains a standard term such as Global, Regional (e.g. for the whole Atlantic), sub-regional (e.g. for a part of the Atlantic), national, local (for sub-national levels). |
Considered a management unit: An aquatic resource or fishery is
declared as [Fishery] Management Unit if it is
effectively the focus for the application of selected
management methods and measures, within the broader
framework of a management system. According to the FAO
Glossary for Responsible Fishing, "a Fishery Management
Unit (FMU) is a fishery or a portion of a fishery
identified in a Fishery Management Plan (FMP) relevant
to the FMP's management objectives." FMU's may be
organised around fisheries biological, geographic,
economic, technical, social or ecological dimensions ,
and the makeup and attribute of a fishery management
unit depends mainly on the FMP's management
objectives. |
Jurisdictional distribution: Jurisdictional qualifier (e.g.
"shared", "shared - highly migratory") of the aquatic
resource related with its spatial distribution. |
Environmental group: Classification of the aquatic
resource according to the environmental group (e.g.
pelagic invertebrate, or demersal fish) to which the
species belong. |
Reference Year: The Reference Year is the last year considered in the stock assessment and/or fishery status. |
| | | | Biological State and Trend Habitat and Biology Climatic zone: Temperate. Depth zone: Slope - Deepslope (500 m - 1000 m). Horizontal distribution: Oceanic. Vertical distribution: Demersal. Geo Form: Seamounts. In the South Pacific, orange roughy aggregates in deep, cold waters (3-9 ˚C) over steep continental slopes, canyons, ocean ridges, and underwater topographical features such as seamounts, especially during spawning and feeding. Orange roughy can also be dispersed over smooth bottoms, rough bottoms, and steep, rough grounds. Orange roughy are bentho-pelagic, generally occurring near the bottom but at times ascending to feed or spawn 50-100 m above the seafloor. Geographical Distribution Jurisdictional distribution: Straddling between High Seas and EEZ Geo References  | Geographic extent of Orange roughy - Southwest Pacific
FAO Major Fishing Areas | 81: Pacific, Southwest |
| | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Orange roughy - Southwest Pacific FAO Major Fishing Areas | 81:
Pacific, Southwest | Large Marine Ecosystem Areas (LME) | 41: East-Central Australian Shelf | 42: Southeast Australian Shelf | 46: New Zealand Shelf |
Resource Structure Considered a single stock: No This species occurs in the North and South Atlantic, in the South-Central Indian Ocean, in the Tasman Sea, on the New Zealand shelf, on seamounts and ridges to the east of New Zealand, and off central and southern Chile. In the South Pacific, orange roughy aggregates in deep, cold waters over steep continental slopes, canyons, ocean ridges, and underwater topographical features such as seamounts, especially during spawning and feeding. Exploitation As described in SC5-DW13_rev1. Fishery Indicators Type | Measure | Value | Unit | Time period |
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Production | Catch | 19 | tonnes | 1981 | Catch | 50 | tonnes | 1982 | Catch | 84 | tonnes | 1983 | Catch | 0 | tonnes | 1984 | Catch | 0 | tonnes | 1985 | Catch | 5 | tonnes | 1986 | Catch | 3 | tonnes | 1987 | Catch | 6 | tonnes | 1988 | Catch | 1047 | tonnes | 1989 | Catch | 163 | tonnes | 1990 | Catch | 53 | tonnes | 1991 | Catch | 714 | tonnes | 1992 | Catch | 4541 | tonnes | 1993 | Catch | 3130 | tonnes | 1994 | Catch | 12153 | tonnes | 1995 | Catch | 8870 | tonnes | 1996 | Catch | 5455 | tonnes | 1997 | Catch | 5411 | tonnes | 1998 | Catch | 8139 | tonnes | 1999 | Catch | 2977 | tonnes | 2000 | Catch | 4235 | tonnes | 2001 | Catch | 4116 | tonnes | 2002 | Catch | 3433 | tonnes | 2003 | Catch | 4070 | tonnes | 2004 | Catch | 3894 | tonnes | 2005 | Catch | 2494 | tonnes | 2006 | Catch | 1470 | tonnes | 2007 | Catch | 837 | tonnes | 2008 | Catch | 1154 | tonnes | 2009 | Catch | 1467 | tonnes | 2010 | Catch | 974 | tonnes | 2011 | Catch | 769 | tonnes | 2012 | Catch | 1207 | tonnes | 2013 | Catch | 1045 | tonnes | 2014 | Catch | 1193 | tonnes | 2015 |
Assessment Level of uncertainty: High A preliminary data-poor stock assessment method is applied to seven orange roughy SPRFMO stocks. The method uses an age-structured population model, with a single fishery on mature fish, and biological parameters borrowed from stock assessments of five New Zealand EEZ orange roughy stocks. The focus of the method is on Bmin which is the minimum virgin biomass that would allow the historical catches to be taken assuming a maximum exploitation rate of 67% (a considered value that has been used in New Zealand orange roughy stock assessments for more than 20 years). Assessment Model Type: Others CASAL (Catch-history, Age-Structured Simulation) A single area, single sex, age structured model (1-100 years with a plus group) was used with Bayesian estimation of virgin biomass (B0). In addition to age, fish were also classified by maturity (immature or mature). A single fishery was assumed to occur at the end of the year on mature fish only. Natural mortality (M) was fixed at 0.45 and a Beverton-Holt stock recruitment relationship was assumed with h = 0.75 (both standard and long-running assumptions for New Zealand orange roughy). Overall Assessment Results The assessment results indicate that five of the seven SPRFMO stocks assessed are very likely to be above the LRP of 20% B0 and most of them are probably above 30% B0. The recent exploitation rates for these stocks are not excessive (being zero in some cases). There is an indication that North West Challenger and Lord Howe Rise may be below the LRP and that recent exploitation rates could be very high. Scientific Advice With respect to the assessment of SPRFMO orange roughy stocks and ensuring sustainable fisheries, the Scientific Committee: i) Noting that the stocks on the Louisville Ridge (Louisville North, Central and South) have a lower potential of having low stock status, recommends a catch limit for the whole of the Louisville Ridge based on the sum of the 50th percentile yield estimates provided in SC5-DW14, the CHA stock assessment method, of 1,140 tonnes to apply for the area for no more than 2 years. A significantly more precautionary approach is recommended if insufficient advancement is made in data collection and stock assessments for the relevant stocks within 2 years. The Scientific Committee recommends that, within this group, the Louisville Central stock should be prioritised for improved data collection and stock assessment. ii) Noting that the stocks in the Tasman Sea (Lord Howe Rise, Northwest Challenger Plateau, and West Norfolk Ridge) are estimated to have a higher potential of being depleted, recommends a catch limit for the Tasman Sea stocks based on a 0.5 scaling of the 50th percentile yield estimates provided for relevant stocks in SC5-DW14 (690 tonnes) from the CHA stock assessment method, resulting in a catch limit of 346 tonnes for the area to apply for no more than 3 years. A significantly more precautionary approach is recommended if insufficient advancement is made in data collection to support stock assessments for the relevant stocks in 3 years. The SC recommend that, within this group, the Lord Howe Rise and Northwest Challenger Plateau stocks should be prioritised for improved data collection and stock assessment. iii) Notes that New Zealand will advise the Commission on an allowance for Westpac Bank which would be in addition to the limit proposed above. iv) Recommends no allowance be included for the South Tasman Rise area which is closed to fishing by Australian and New Zealand vessels. Management Management unit: Yes Target trawl fisheries for orange roughy have occurred in the South Pacific since the late 1970’s to the present day. The Lord Howe Rise and Northwest Challenger Plateau have been the main areas of orange roughy catch in the Tasman Sea outside the New Zealand and Australian EEZs. A fishery on the Norfolk Ridge is a recent development, and the Louisville Ridge fishery to the east of New Zealand continues. Catches peaked in the area in the mid 1990s at around 15,000 t, but in recent years have been 2,000-3,000 t. Orange roughy in the SPRFMO Area are managed under CMM03-2019 (Bottom Fishing) and CMM03a-2019 (Deepwater species). Source of information SPRFMO. 2017. Report of the fifth meeting of the Scientific Committee, Shanghai, China 23-28 September 2017. http://www.sprfmo.int/assets/SC5-2017/SC05-Report-Final-4Oct2017.pdfSPRFMO. 2007. Information describing orange roughy Hoplostethus atlanticus fisheries relating to the South Pacific Regional Fishery Management Organisation. http://www.sprfmo.int/assets/Fisheries/Species-Profiles/SP-07-SWG-INF-09-Last-Orange-roughy-species-profile-040507-Chilean-revision.pdfAll references to figures, tables and bibliography in the text are found within the source of information. |
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