|
| Marine Resource Fact Sheet |
| |
| 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. |
|
| Related observations | Locate in inventory | | | | Species: | | FAO Names: en - Splendid alfonsino, fr - Béryx long, es - Alfonsino besugo, ar - عُنقُد طويل, zh - 红金眼鲷 |
Fishery IndicatorsProduction: Catch |
|
| Geographic extent of Alfonsino - Southern Indian Ocean Map tips - Click on
 to turn layers on and off - Double-click to zoom in
- Drag to pan
- Hold down the shift key and drag to zoom to a particular region
| RFB competence |
|---|
| SIOFA | SIOFA area of competence |
|---|
|
|
|
|
|
| Main Descriptors | Considered a single stock: No Spatial Scale: Regional
Management unit: No Reference year: 2020
|
| 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 Stocks estimated to be at about 60% of their preexploitation spawning stock biomass levels, and well above the levels corresponding to MSY. Habitat and Biology Climatic zone: Temperate. Depth zone: Slope (200 m - 1000 m). Horizontal distribution: Oceanic. Vertical distribution: Demersal. Geo Form: Seamounts. Geographical Distribution Jurisdictional distribution: High Seas Purely Geo References  | | Geographic extent of Alfonsino - Southern Indian Ocean
| RFB competence | SIOFA: SIOFA area of competence |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Alfonsino - Southern Indian Ocean | FAO Major Fishing Areas | 51: Indian Ocean, Western | | 57: Indian Ocean, Eastern | | Large Marine Ecosystem Areas (LME) | 30: Agulhas Current | | 31: Somali Coastal Current | | 32: Arabian Sea | | 43: Southwest Australian Shelf | | 44: West-Central Australian Shelf | | 45: Northwest Australian Shelf |
Resource Structure Considered a single stock: No Exploitation 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 |
|---|
| Production | Catch | 4613 | tonnes | 2020 | | Catch | 4098 | tonnes | 2019 | | Catch | 3153 | tonnes | 2018 | | Catch | 5248 | tonnes | 2017 | | Catch | 4061 | tonnes | 2016 | | Catch | 5244 | tonnes | 2015 | | Catch | 3556 | tonnes | 2014 | | Catch | 5406 | tonnes | 2013 |
Assessment 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. Assessment Model Type: Age-Structured Age-Structured Production Model Models fitted to the CPUE series and single year of commercial catch length distribution information available. Overall Assessment 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. Scientific 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 Source of information SIOFA Secretariat (2022). Overview of SIOFA Fisheries 2022. Southern Indian Ocean Fisheries Agreement (SIOFA), 50 pp.  https://www.siofa.org/sites/default/files/files/Overview%20of%20SIOFA%20Fisheries%202022_0.pdfA. Brandão, D.S. Butterworth, S. Johnston (2020). Age-Structured Production Model (ASPM) assessments of the Alfonsino (Beryx splendens) resource in the SIOFA area of the Southern Indian Ocean. SIOFA Second Meeting of the Stock and Ecological Risk Assessment Working Group (SERAWG2). Working paper SERAWG-02-14. 19 March 2020. https://siofa.org/sites/default/files/documents/meetings/SERAWG-02-14%20Age-Structured%20Production%20Model%20assessments%20of%20the%20Alfonsino.pdfA. Brandão, D.S. Butterworth, S. Johnston (2020). Age-Structured Production Model (ASPM) assessments of the Alfonsino (Beryx splendens) resource in the SIOFA area of the Southern Indian Ocean. SIOFA Fifth Meeting of the Scientific Committee (SC5). Working paper SC-05-29. 19 March 2020. https://siofa.org/sites/default/files/documents/meetings/SC-05-29%20Age-Structured%20Production%20Model%20assessments%20of%20the%20Alfonsino.pdf |
|
| |
|
