|
Fact Sheet Title Fact Sheet |
| |
| Data Ownership | This document provided, maintained and owned by Indian Ocean Tuna Commission (IOTC) , is part of IOTC Stock Status Reports data collection. |
|
ident Block | ident Block | | Species List: | Species Ref: en - Kawakawa, fr - Thonine orientale, es - Bacoreta oriental |
Fishery IndicatorsProduction: Catch |
|
| ident Block Kawakawa - 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
fao Major |
---|
51 | Indian Ocean, Western |
---|
57 | Indian Ocean, Eastern |
---|
|
|
|
|
|
Aq Res | Biological Stock: Yes
Management unit: Yes Reference year: 2019 |
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. |
| | | | Habitat Bio Climatic Zone: Temperate; Tropical. Horizontal Dist: Oceanic. Vertical Dist: Pelagic. Geo Dist Geo Dist: Highly migratory Geo Dist | Geo Dist Kawakawa - Indian Ocean
fao Major | 51: Indian Ocean, Western | 57: Indian Ocean, Eastern |
| | | | Geo Dist |
Geo DistKawakawa - Indian Ocean fao Major | 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 |
Aq Res Struct Biological Stock: Yes No information is available on stock structure of kawakawa 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. Exploit Fishery Indicators Type | Measure | Value | Unit | Time period |
---|
Production | Catch | 4681 | tonnes | Average 1950 - 1959 | Catch | 8849 | tonnes | Average 1960 - 1969 | Catch | 20306 | tonnes | Average 1970 - 1979 | Catch | 42615 | tonnes | Average 1980 - 1989 | Catch | 70245 | tonnes | Average 1990 - 1999 | Catch | 103466 | tonnes | Average 2000 - 2009 | Catch | 149022 | tonnes | Average 2010 - 2019 | Catch | 145713 | tonnes | 2011 | Catch | 151465 | tonnes | 2012 | Catch | 159285 | tonnes | 2013 | Catch | 150271 | tonnes | 2014 | Catch | 148272 | tonnes | 2015 | Catch | 151479 | tonnes | 2016 | Catch | 150522 | tonnes | 2017 | Catch | 162163 | tonnes | 2018 | Catch | 148375 | tonnes | 2019 | Catch | 143211 | tonnes | 2020 |
Bio Assess No new stock assessment was conducted for kawakawa in 2021 and so the results are based on the assessment carried out in 2020 using data-limited assessment techniques. The OCOM model indicated that the fishing mortality F was very close to FMSY (F/FMSY=0.98) and the B above BMSY (B/BMSY=1.13). The estimated probability of the stock currently being in green quadrant of the Kobe plot is about 50%. Due to the quality of the data being used, the simple modelling approach employed in 2020, and the large increase in kawakawa catches over the last decade (Fig. 1), measures need to be taken in order to reduce the level of catches which have surpassed the estimated MSY levels for all years since 2011. Based on the weight-of-evidence available, the kawakawa stock for the Indian Ocean is classified as not overfished and not subject to overfishing (Table 1, Fig. 2). Assess Models Type: Biomass-aggregated Optimised Catch Only Method (OCOM) Assess Models Type: Age-structured Stock Synthesis III (SS3) Sci Advice The assessment models rely on catch data, which are considered to be highly uncertain. The catch in 2019 was equal to the estimated MSY. The available gillnet CPUE of kawakawa showed a somewhat increasing trend although the reliability of the index as abundance indices remains unknown. Despite the substantial uncertainties, the stock is probably very close to being fished at MSY levels and that higher catches may not be sustained in the longer term. A precautionary approach to management is recommended. Management Management unit: Yes Sources IOTC–SC23 2020. Report of the 23rd Session of the IOTC Scientific Committee. Seychelles, 7 – 11 December 2020. IOTC–2020–SC23–R[E]: 211pp. https://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. |
|
| |
|