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Narrow-barred Spanish mackerel - Indian Ocean
Marine Resource  Fact Sheet
Stock status report 2018
Narrow-barred Spanish mackerel - Indian Ocean
Fact Sheet Citation  
Narrow-barred Spanish mackerel Indian Ocean
Owned byIndian Ocean Tuna Commission (IOTC) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - Narrow-barred Spanish mackerel, fr - Thazard rayé indo-pacifique, es - Carite estriado Indo-Pacífico

Fishery Indicators
Production: Catch
Geographic extent of Narrow-barred Spanish mackerel - Indian Ocean
Main Descriptors
Considered a single stock: Yes        Management unit: Yes
Reference year: 2015
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateSubject to overfishing (F2015/FMSY (80% CI) =1.28 (1.03–1.69))High fishing mortality
Abundance levelOverfished (B2015/BMSY (80% CI) = 0.89 (0.63–1.15))Low abundance
Habitat and Biology
Climatic zone: Temperate; Tropical.   Horizontal distribution: Oceanic.   Vertical distribution: Pelagic.  

Geographical Distribution
Jurisdictional distribution: Highly migratory

Water Area Overview
 
Geo References
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
TypeMeasureValueUnitTime period
ProductionCatch 11318tonnesAverage 1950 - 1959
Catch 20271tonnesAverage 1960 - 1969
Catch 37593tonnesAverage 1970 - 1979
Catch 74210tonnesAverage 1980 - 1989
Catch 88670tonnesAverage 1990 - 1999
Catch 111382tonnesAverage 2000 - 2009
Catch 123297tonnes2008
Catch 135028tonnes2009
Catch 137148tonnes2010
Catch 144470tonnes2011
Catch 157688tonnes2012
Catch 155837tonnes2013
Catch 167977tonnes2014
Catch 168929tonnes2015
Catch 170549tonnes2016
Catch 167938tonnes2017
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.  Click to openhttps://iotc.org/sites/default/files/documents/2019/02/IOTC-2018-SC21-RE_FINAL_DO_NOT_MODIFY_Rev1.pdf
Bibliography
 
All references to figures, tables and bibliography in the text are found within the source of information.
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