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Indo-Pacific king mackerel - Indian Ocean
Marine Resource  Fact Sheet
Stock status report 2021
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
 
Species:
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: 2019
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateNot subject to overfishing (F2019/FMSY (80% CI) = 0.90 (0.78–2.01))Uncertain/Not assessed
Abundance levelNot overfished (B2019/BMSY (80% CI) = 1.03 (0.46–1.19))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.
Exploitation
 
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 4630tonnesAverage 1950 - 1959
Catch 7268tonnesAverage 1960 - 1969
Catch 14798tonnesAverage 1970 - 1979
Catch 22288tonnesAverage 1980 - 1989
Catch 27149tonnesAverage 1990 - 1999
Catch 34584tonnesAverage 2000 - 2009
Catch 44423tonnesAverage 2010 - 2019
Catch 43012tonnes2011
Catch 40708tonnes2012
Catch 44595tonnes2013
Catch 47609tonnes2014
Catch 45685tonnes2015
Catch 44973tonnes2016
Catch 48096tonnes2017
Catch 43015tonnes2018
Catch 45796tonnes2019
Catch 42471tonnes2020
Assessment
Level of uncertainty: High


A new assessment was carried out in 2021 using the data-limited techniques (CMSY and LB-SPR). Analysis using the catch only method CMSY indicates the stock is being exploited at a rate that is below FMSY in recent years and that the stock appears to be above BMSY, although the estimates would be more pessimistic if the stock productivity is assumed to be less resilient. The analysis using the length-based approach (LB-SPR) was also undertaken in 2021 and the results are not conflicting with CMSY in terms of status. The catch-only model has provided a more defensible approach in addressing the uncertainty of key parameters and the currently available catch data for the Indo-Pacific king mackerel appear to be of sufficiently improved quality for conducting an assessment albeit still with some uncertainty. Based on the weight-of-evidence currently available, the stock is considered to be not overfished and not subject to overfishing (Table 1; Fig. 2).
Assessment Model
Type:  Biomass-aggregated
Optimised Catch Only Method (OCOM)
Catch-MSY
Scientific Advice

Reported catches of Indo-Pacific king mackerel in the Indian Ocean has increased considerably since the late 2000s with recent catches fluctuating around estimated MSY, although the catch in 2020 was below the estimated MSY. This suggests that the stock is very close to being fished at MSY levels and that higher catches may not be sustained despite the substantial uncertainty associated with the assessment, a precautionary approach to management is recommended.
Management
Management unit: Yes
Source of information
 
IOTC–SC23 2020. Report of the 23rd Session of the IOTC Scientific Committee. Seychelles, 7 – 11 December 2020. IOTC–2020–SC23–R[E]: 211pp  Click to openhttps://www.iotc.org/sites/default/files/documents/2021/06/IOTC-2020-SC23-RE_Rev1.pdf
Bibliography
 
All references to figures, tables and bibliography in the text are found within the source of information.
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