Fisheries and Resources Monitoring System

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

Fishery Indicators
Production: Catch
Geographic extent of Indo-Pacific king mackerel - Indian Ocean
Main Descriptors
Considered a single stock: Yes        Management unit: Yes
Reference year: 2014
Biological State and Trend
State & Trend Descriptors
Exploitation rateNot assessed/Uncertain (F2014/FMSY (80% CI) = 0.98 (0.85–1.14))Uncertain/Not assessed
Abundance levelNot assessed/Uncertain (B2014/BMSY (80% CI) = 1.10 (0.84–1.29))Uncertain/Not assessed
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

No information is available on the stock structure of Indo-Pacific king mackerel stock structure in Indian Ocean. 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.
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 4630tonnesAverage 1950 - 1959
Catch 7274tonnesAverage 1960 - 1969
Catch 14798tonnesAverage 1970 - 1979
Catch 22893tonnesAverage 1980 - 1989
Catch 29415tonnesAverage 1990 - 1999
Catch 36428tonnesAverage 2000 - 2009
Catch 47880tonnes2008
Catch 53448tonnes2009
Catch 42260tonnes2010
Catch 44653tonnes2011
Catch 42492tonnes2012
Catch 46305tonnes2013
Catch 49465tonnes2014
Catch 47541tonnes2015
Catch 46603tonnes2016
Catch 52555tonnes2017

Following a first data-poor assessment in 2015, Indo-Pacific king mackerel was again assessed using SRA techniques (Catch-MSY and OCOM) in 2016. The OCOM model, considered the more robust of the two SRA models applied in terms of assumptions and treatment of priors, indicates that overfishing is not occurring and the stock is not overfished (Fig. 1; Table 1). Moreover, the average catches (c. 45,000 t) over the last 5 years have been within the estimated MSY range (43,000 – 46,000 t). However, catches have increased in the last 2 years and in 2014 exceeded this MSY range. The continuing low levels of catch reporting for this species, coupled with the highly variable and uncertain estimates of growth parameters used to estimate model priors, prompted the WPNT to exercise caution in interpreting model results for king mackerel. Consequently, and similar to 2015, the WPNT considered that stock status in relation to the Commission’s BMSY and FMSY target reference points remains uncertain (Table 1), indicating that a precautionary approach to the management of Indo-Pacific king mackerel should be adopted. 
Assessment Model
Type:  Biomass-aggregated
Optimised Catch Only Method (OCOM)
Scientific Advice

A precautionary approach to the management of Indo-Pacific king mackerel should be considered by the Commission, by ensuring that catches are reduced to levels below the current estimated range of MSY. The stock should be closely monitored. Mechanisms need to be developed by the Commission to improve current statistics by encouraging CPCs [Contracting parties and cooperating non-contracting parties] to comply with their recording and reporting requirement, so as to better inform scientific advice.
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 open
All references to figures, tables and bibliography in the text are found within the source of information.
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