|
Fact Sheet Title Fact Sheet |
| |
Mullus barbatus - Malta (GSA 15) |
| Data Ownership | This document provided, maintained and owned by General Fisheries Commission for the Mediterranean (GFCM) , is part of GFCM Stock Status Reports data collection. |
|
Monitoring Range Min2009. ident Block | ident Block | | Species List: | Species Ref: en - Red mullet, fr - Rouget de vase, es - Salmonete de fango, ru - Султанка обыкновенная (=барабулька) |
Species Ref Type: Measure |
|
| ident Block Red mullet - Malta Aq Res Ident Aq Res Ident Aq Res Ident gfcm Sub Area |
---|
15 | Malta Island |
---|
|
|
|
|
|
Aq Res | Biological Stock: Biological Stock
Value: Sub-Regional 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. |
| | | | Aq Res State Trend Sustainably exploited. [The GFCM methodology to provide stock status and management advice is described in the Appendix F of the Sixteenth Session of the Scientific Advisory Committee Report. See the Bibliography section.] Habitat Bio Climatic Zone: Temperate. Bottom Type: Soft bottom. Depth Zone: Shelf 50 200m. Horizontal Dist: Neritic; Littoral. Vertical Dist: Demersal/Benthic. Water Area Overview Spatial Scale: Spatial Scale Water Area Overview | Water Area Overview Red mullet - Malta
gfcm Sub Area | 15: Malta Island |
| | | | Water Area Overview
| | | | Water Area Overview |
Water Area OverviewRed mullet - Malta Aq Res Struct Biological Stock: Biological Stock Stock assessment in the GFCM area of application is often conducted by management units, based on GSAs. This method does not ensure that the whole stock is assessed, since stocks may cover several different management units. In some cases, when there is scientific evidence of a stock spreading through different GSAs, as well as information on species from different GSAs, existing information is combined across GSAs. This is then defined as a “joint stock assessment of a shared stock”. The GFCM recommends that when scientific evidence of shared stocks exists, joint stock assessments should be attempted. A number of activities aimed at achieving a better definition of stock boundaries are currently being conducted at the GFCM level. [The State of Mediterranean and Black Sea Fisheries, 2016] Exploit Red mullet is one of the main coastal demersal resources in the Mediterranean; it is fished by otter trawls, trammel nets and gillnets. Red mullet is caught together with other important species, such as striped red mullet, European hake, seabreams and pandoras (Pagellus spp), stargazer (Uranoscopus scaber), rays (Raja spp.), weevers (Trachinus spp.), common octopus, common cuttlefish, horned and musky octopuses (Eledone spp.), and anglerfish (Lophius spp.). Red mullet is fished by trawling, almost exclusively on the shelf bottom. Based on available knowledge, the red mullet inhabiting the continental shelf of GSA 15 is considered as a separate stock unit. The average annual Maltese landing from trawlers for the period 2009-2019 was 16 tonnes. Fishery Indicator Fishery Indicator | Fishery Indicator | Fishery Indicator | Fishery Indicator | Fishery Indicator |
---|
Type | Measure | 8.94 | tonnes | 2009 | Measure | 12.29 | tonnes | 2010 | Measure | 14.5 | tonnes | 2011 | Measure | 23.92 | tonnes | 2012 | Measure | 42.38 | tonnes | 2013 | Measure | 12.3 | tonnes | 2014 | Measure | 21.25 | tonnes | 2015 | Measure | 11.64 | tonnes | 2016 | Measure | 9.56 | tonnes | 2017 | Measure | 11.68 | tonnes | 2018 | Measure | 11.2 | tonnes | 2019 |
Bio Assess Data The assessment was based on catch-at-age and landing data from Malta (otter trawl 12-40 m). The number-at-age from the MEDITS survey in GSA 15 were used for tuning. The following parameters (VBGF and LW relationships) were considered: L∞ = 42.705, k = 0.67, t0 = 0.208, a= 0.0029, b = 2.4818 for females and L∞ = 24.1, k= 0.42, t0 = 0.8, a = 0.001, b = 3.0421 for combined specimens. M was estimated using the Gislason method. Assess Models Type: Age-structured XSA The assessment was performed using XSA as implemented in the FLR. According to the recommendations of the WG, current F was obtained as the average of the last three years (2017-2019). Results The current F(1-3) was 0.338. F0.1 was estimated using the FLR routine in the benchmark assessment. The SSB in 2019 was below the 33rd percentile of the SSB time-series. Sci Advice Not increase fishing mortality. Sources FAO. 2021. General Fisheries Commission for the Mediterranean (GFCM). Report of the twenty-second session of the Scientific Advisory Committee on Fisheries, online, 22–25 June 2021. FAO Fisheries and Aquaculture Report No. 1347. Rome. https://www.fao.org/3/cb7622en/cb7622en.pdfReport of the Working Group on Stock Assessment of Demersal Species (WGSAD). Online, 18–23 January 2021. https://www.fao.org/gfcm/technical-meetings/detail/en/c/1412431/ Bibliography FAO. 2020. The State of Mediterranean and Black Sea Fisheries 2020. General Fisheries Commission for the Mediterranean. Rome. https://www.fao.org/3/cb2427en/cb2427en.pdfFAO. 2016. The State of Mediterranean and Black Sea Fisheries. General Fisheries Commission for the Mediterranean. Rome, Italy. https://www.fao.org/3/i5496e/i5496e.pdfFAO General Fisheries Commission for the Mediterranean/Commission générale des pêches pour la Méditerranée. Report of the sixteenth session of the Scientific Advisory Committee. St. Julian’s, Malta, 17–20 March 2014/Rapport de la seizième session du Comité scientifique consultatif. Saint Julien, Malte, Malte, 17-20 mars 2014. FAO Fisheries and Aquaculture Report/FAO Rapport sur les pêches et l’aquaculture. No. R1102. Rome. 2015. 250 pp. https://www.fao.org/3/i4381b/i4381b.pdfGeneral Fisheries Commission for the Mediterranean (GFCM) Stock Assessment Results (STAR). https://www.fao.org/gfcm/data/star/en/ |
|
| |
|