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| Marine Resource Fact Sheet |
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| Narrow-barred Spanish mackerel - Indian Ocean |
 | Narrow-barred Spanish mackerel Indian Ocean |
| | Data Ownership | | This document provided, maintained and owned by Indian Ocean Tuna Commission (IOTC) , is part of IOTC Stock Status Reports data collection. |
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| Related observations | Locate in inventory | | | | Species: | | FAO Names: en - Narrow-barred Spanish mackerel, fr - Thazard rayé indo-pacifique, es - Carite estriado Indo-Pacífico |
Fishery IndicatorsProduction: Catch |
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| Geographic extent of Narrow-barred Spanish mackerel - Indian Ocean Map tips - Click on
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| FAO Major Fishing Areas |
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| 51 | Indian Ocean, Western |
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| 57 | Indian Ocean, Eastern |
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| Main Descriptors | Considered a single stock: Yes Management unit: Yes
Reference year: 2015 |
| 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; Tropical. Horizontal distribution: Oceanic. Vertical distribution: Pelagic. Geographical Distribution Jurisdictional distribution: Highly migratory Geo References  | | Geographic extent of Narrow-barred Spanish mackerel - Indian Ocean
| FAO Major Fishing Areas | 51: Indian Ocean, Western | | 57: Indian Ocean, Eastern |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Narrow-barred Spanish mackerel - 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 | | 33: Red Sea | | 34: Bay of Bengal | | 38: Indonesian Sea | | 39: North Australian Shelf | | 42: Southeast Australian Shelf | | 43: Southwest Australian Shelf | | 44: West-Central Australian Shelf | | 45: Northwest Australian Shelf |
Resource Structure Considered a single stock: Yes Genetic studies carried out on Scomberomorus commerson from Djibouti, Oman and United Arab Emirates showed there were small genetic differences among stocks in these three places. The IOTC coordinated Stock Structure Project, which commenced in early-2015, aims to supplement gaps in the existing knowledge on biological data, and in particular provide an insight on whether neritic tuna and tuna like species should be considered as a single Indian Ocean stock. Exploitation Fishery Indicators | Type | Measure | Value | Unit | Time period |
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| Production | Catch | 11318 | tonnes | Average 1950 - 1959 | | Catch | 20271 | tonnes | Average 1960 - 1969 | | Catch | 37593 | tonnes | Average 1970 - 1979 | | Catch | 74210 | tonnes | Average 1980 - 1989 | | Catch | 88670 | tonnes | Average 1990 - 1999 | | Catch | 111382 | tonnes | Average 2000 - 2009 | | Catch | 123297 | tonnes | 2008 | | Catch | 135028 | tonnes | 2009 | | Catch | 137148 | tonnes | 2010 | | Catch | 144470 | tonnes | 2011 | | Catch | 157688 | tonnes | 2012 | | Catch | 155837 | tonnes | 2013 | | Catch | 167977 | tonnes | 2014 | | Catch | 168929 | tonnes | 2015 | | Catch | 170549 | tonnes | 2016 | | Catch | 167938 | tonnes | 2017 |
Assessment The assessment in 2017 was conducted using the Optimised Catch Only Method (OCOM). Based on the weight-of-evidence available, the stock appears to be overfished and subject to overfishing. Assessment Model Type: Biomass-aggregated Optimised Catch Only Method (OCOM) Scientific Advice There is a continued high risk of exceeding MSY-based reference points by 2025, even if catches are reduced to 80% of the 2015 levels. If catches are reduced by 30% of the 2015 levels at the time of the assessment, which corresponds to catches below MSY, the stock is expected to recover to levels above the MSY reference points with at least a 50% probability by 2025. Management Management unit: Yes Source of information IOTC–SC21 2018. Report of the 21st Session of the IOTC Scientific Committee. Seychelles, 3 – 7 December 2018. IOTC–2018–SC21–R[E]: 250 pp.  https://iotc.org/sites/default/files/documents/2019/02/IOTC-2018-SC21-RE_FINAL_DO_NOT_MODIFY_Rev1.pdfBibliography All references to figures, tables and bibliography in the text are found within the source of information. |
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