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Fact Sheet Title Fact Sheet |
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European hake - Strait of Sicily |
Merluccius merluccius - Strait of Sicily (GSAs 12-16) |
| 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. |
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ident Block | ident Block | | Species List: | Species Ref: en - European hake, fr - Merlu européen, es - Merluza europea, ru - Мерлуза восточноатлантическая |
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| ident Block European hake - Strait of Sicily
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gfcm Sub Area |
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12 | Northern Tunisia |
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13 | Gulf of Hammamet |
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14 | Gulf of Gabes |
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15 | Malta Island |
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16 | South of Sicily |
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Aq Res | Biological Stock: No
Value: Sub-Regional Management unit: Yes
Reference year: 2019
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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. |
| | | | Aq Res State Trend In overexploitation and overexploited. [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; Hard bottom. Depth Zone: Shelf (50 m - 200 m); Slope (200 m - 1000 m). Horizontal Dist: Neritic. Vertical Dist: Demersal/Benthic. Geo Dist Geo Dist: Shared between nations Water Area Overview Spatial Scale: Sub-Regional Water Area Overview | Water Area Overview European hake - Strait of Sicily
gfcm Sub Area | 12: Northern Tunisia | 13: Gulf of Hammamet | 14: Gulf of Gabes | 15: Malta Island | 16: South of Sicily |
| | | | Water Area Overview
fao Div | 37.1.3: Sardinia | 37.2.2: Ionian |
| | | | Water Area Overview |
Water Area OverviewEuropean hake - Strait of Sicily Aq Res Struct Biological Stock: No 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] [European hake - Strait of Sicily is a shared stock and a joint stock assessment was conducted] Exploit In the Strait of Sicily European hake is fished by six fishing fleets: Italian coastal trawlers, Italian distant trawlers, Tunisian trawlers, Maltese trawlers, and Tunisian and Italian artisanal vessels. Mean annual landings of European hake for 2016-2019 were about 850 tonnes from Italian and Maltese trawlers and about 1 500 tonnes from Tunisian trawlers. European hake is the main commercial bycatch species of deep-water shrimp fisheries and a target species for vessels using longlines and gillnets. Trawlers catching European hake exploit a highly diversified species assemblages, the main other commercial species being deep-water rose shrimp (generally the main target species), striped mullet and red mullet. Size structures of European hake catches range between 4 cm and 72 cm total length (TL) for the Italian-Maltese trawler, 6-68 cm TL for the Tunisian trawler and 10-64 cm TL for the Italian-Tunisian passive gear. Bio Assess Data Stock abundance indices were available from the MEDITS survey carried out in GSA 16 and conducted mainly in the third quarter of the year. Data on biomass index and length composition are available from 1994 to 2019. Moreover, the same parameters of the benchmark model were used. Assess Models Type: Age-structured SS3 The assessment was performed through the SS3 model. Results The final results of the model were: current F (0.50, estimated as the F1-6 in the last year of the time series, 2019) is higher than FMSY indicating that European hake stock in GSAs 12, 13, 14, 15 and 16 is over-exploited (F/FMSY = 1.72). Moreover, the model estimates a SSB (2020, that corresponds to 1 January) of 4 744 tonnes. Sci Advice Reduce fishing mortality. Management Management unit: Yes Sources FAO. 2021. General Fisheries Commission for the Mediterranean. 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.pdf |
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