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Fact Sheet Title Fact Sheet |
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European hake - Northern and Southern Adriatic Sea |
Merluccius merluccius - Northern and Southern Adriatic Sea (GSAs 17-18) |
| 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 |
Fishery IndicatorsProduction: Catch |
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| ident Block European hake - Northern and Southern Adriatic Sea
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gfcm Sub Area |
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17 | Northern Adriatic |
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18 | Southern Adriatic |
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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 Biomass above the reference point and in overexploitation. [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. Water Area Overview Spatial Scale: Sub-Regional Water Area Overview | Water Area Overview European hake - Northern and Southern Adriatic Sea
gfcm Sub Area | 17: Northern Adriatic | 18: Southern Adriatic |
| | | | Water Area Overview
fao Div | 37.2.1: Adriatic | 37.2.2: Ionian |
| | | | Water Area Overview |
Water Area OverviewEuropean hake - Northern and Southern Adriatic Sea 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] Exploit European hake is one of the most important demersal species in the Adriatic Sea. In this area, European hake is exploited mainly by bottom trawlers and in the southern part of the Adriatic Sea and in Croatian waters longlines are also relevant. Landings present a fluctuating trend all over the time series considered accounting for the highest value in 2006 and the lowest value in 2019. Italy is the country that mainly exploits this species; in particular, Italian bottom trawl catches of GSAs 17 and 18 represent around 75 percent of the total Adriatic catches. Bottom trawl catches are mainly composed of ages 0, 1 and 2, whereas longlines exploit bigger individuals. Fishery Indicators Type | Measure | Value | Unit | Time period |
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Production | Catch | 9 441 | tonnes | 1998 | Catch | 6 666 | tonnes | 1999 | Catch | 6 268 | tonnes | 2000 | Catch | 6 206 | tonnes | 2001 | Catch | 5 442 | tonnes | 2002 | Catch | 7 322 | tonnes | 2003 | Catch | 7 336 | tonnes | 2004 | Catch | 8 772 | tonnes | 2005 | Catch | 10 832 | tonnes | 2006 | Catch | 8 959 | tonnes | 2007 | Catch | 8 312 | tonnes | 2008 | Catch | 7 998 | tonnes | 2009 | Catch | 6 923 | tonnes | 2010 | Catch | 6 416 | tonnes | 2011 | Catch | 6 818 | tonnes | 2012 | Catch | 6 753 | tonnes | 2013 | Catch | 5 493 | tonnes | 2014 | Catch | 5 817 | tonnes | 2015 | Catch | 5 764 | tonnes | 2016 | Catch | 6 033 | tonnes | 2017 | Catch | 6 167 | tonnes | 2018 | Catch | 5 353 | tonnes | 2019 |
Bio Assess Data The biological information, specifically growth and length-weight relationship parameters, is assumed equal to those estimated by the DCF sampling protocol in the Italian GSA 18. Catch data are included by country and gear, as well as the length composition of catches. Survey data corresponds to the MEDITS index including both GSAs 17 and 18. Assess Models Type: Others SS3 The present assessment is an update of the evaluation presented in 2019. The fundamental idea of this stock assessment is to use the integrated approach of SS3 (version SS3.3) to model the size structure data available for European hake. SS3 uses forward projection of population in the SCAA approach. Results The overall stock status conclusions confirm the positive trend depicted in the last years assessment; SSB shows a continuous decreasing trend, while fishing mortality has constantly decreased since 2015. Recruitment has quite a stable trend. Reference points were estimated from SS3 and following the International Council for the Exploration of the Sea (ICES) procedure (ICES, 2017) in the framework of the benchmark (GFCM, 2019). Management Management unit: Yes GSAs 17-18. 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/ |
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