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| Fact Sheet Title Fact Sheet |
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| Alfonsino - Southern Indian Ocean |
| | Data Ownership | | This document provided, maintained and owned by South Indian Ocean Fisheries Agreement (SIOFA) , is part of SIOFA Stocks Status Reports data collection. |
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| ident Block | ident Block | | | | Species List: | | Species Ref: en - Splendid alfonsino, fr - Béryx long, es - Alfonsino besugo, ar - عُنقُد طويل, zh - 红金眼鲷 |
Fishery IndicatorsProduction: Catch |
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| ident Block Alfonsino - Southern Indian Ocean
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| SIOFA | SIOFA area of competence |
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| Aq Res | Biological Stock: No
Value: Regional
Management unit: No
Reference year: 2021
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| 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. |
| | | | | | Aq Res State Trend Stocks estimated to be at about 60% of their preexploitation spawning stock biomass levels, and well above the levels corresponding to MSY. Habitat Bio Climatic Zone: Temperate. Depth Zone: Slope (200 m - 1000 m). Horizontal Dist: Oceanic. Vertical Dist: Demersal. Geo Form: Seamounts. Geo Dist Geo Dist: High Seas Purely Water Area Overview  | | Water Area Overview Alfonsino - Southern Indian Ocean
| rfb Comp | SIOFA: SIOFA area of competence |
| | | | | | Water Area Overview |
Water Area OverviewAlfonsino - Southern Indian Ocean Aq Res Struct Biological Stock: No Exploit Southern Indian Ocean Bottom trawl orange roughy fishery - SIOFA watersSouthern Indian Ocean Midwater trawl alfonsino fishery - SIOFA waters Fishery Indicators | Type | Measure | Value | Unit | Time period |
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| Production | Catch | 3 881 | tonnes | 2021 | | Catch | 4 613 | tonnes | 2020 | | Catch | 4 098 | tonnes | 2019 | | Catch | 3 153 | tonnes | 2018 | | Catch | 5 248 | tonnes | 2017 | | Catch | 4 061 | tonnes | 2016 | | Catch | 5 244 | tonnes | 2015 | | Catch | 3 556 | tonnes | 2014 | | Catch | 5 406 | tonnes | 2013 |
Bio Assess Assessed Data Total catch for each fleet, other member countries and non-member countries, with catches starting from 1977; relative abundance indices from the CPUE standardisation excluding the series for S2 (East); and length data for the S1 fleet in 2018. Assess Models Type: Age-Structured Production Model Assess Model Entry Models fitted to the CPUE series and single year of commercial catch length distribution information available. Results Both West and East stocks are estimated to be at about 60% of their preexploitation spawning stock biomass levels, and well above the levels corresponding to MSY. Sci Advice There are uncertainties around the use of CPUE data but, in the absence of other more suitable indices of abundance, the standardised CPUE data was the best information that was currently available. Management Management unit: No Sources SIOFA Secretariat (2023). Overview of SIOFA Fisheries 2023. Southern Indian Ocean Fisheries Agreement (SIOFA), 64 pp.  https://siofa.org/sites/default/files/files/SIOFA-Fisheries-Overview-2023_redacted.pdf |
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