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Fact Sheet Title Fact Sheet |
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Blue and red shrimp - Northern Alboran Sea |
Aristeus antennatus - Northern Alboran Sea (GSA 1) |
| 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 - Blue and red shrimp, fr - Crevette rouge, es - Gamba rosada |
Fishery IndicatorsProduction: Landed Volume |
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| ident Block Blue and red shrimp - Northern Alboran Sea
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gfcm Sub Area |
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1 | Northern Alboran Sea |
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Aq Res | Biological Stock: No
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. |
Reference Year: The Reference Year is the last year considered in the stock assessment and/or fishery status. |
| | | | Aq Res State Trend 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. Depth Zone: Slope (200 m - 1000 m); Abyssal ( >1000m). Horizontal Dist: Neritic; Oceanic. Vertical Dist: Demersal/Benthic. Water Area Overview Spatial Scale: Sub-Regional Water Area Overview | Water Area Overview Blue and red shrimp - Northern Alboran Sea
gfcm Sub Area | 1: Northern Alboran Sea |
| | | | Water Area Overview
| | | | Water Area Overview |
Water Area OverviewBlue and red shrimp - Northern Alboran 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 Blue and red shrimp is the most important resource of slope bottom trawling in GSA 1 (northern Alboran Sea) and is targeted by the largest vessels of the deep-water trawl fleet segment. The trawlers catch red shrimp on the slope on muddy bottoms between depths of 400 m to 800 m. A total of 46 vessels (2019) had fishing activities directed towards blue and red shrimp in the GSA 1 fishing ground. This segment fleet, catches about 120 tonnes of red shrimp per year (average 2017-2019). Fishery Indicators Type | Measure | Value | Unit | Time period |
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Production | Landed Volume | 169.3 | tonnes | 2002 | Landed Volume | 289.82 | tonnes | 2003 | Landed Volume | 276.92 | tonnes | 2004 | Landed Volume | 243.66 | tonnes | 2005 | Landed Volume | 239.42 | tonnes | 2006 | Landed Volume | 192.68 | tonnes | 2007 | Landed Volume | 143.48 | tonnes | 2008 | Landed Volume | 121.6 | tonnes | 2009 | Landed Volume | 135.76 | tonnes | 2010 | Landed Volume | 140.68 | tonnes | 2011 | Landed Volume | 141.73 | tonnes | 2012 | Landed Volume | 125.15 | tonnes | 2013 | Landed Volume | 168.09 | tonnes | 2014 | Landed Volume | 176.57 | tonnes | 2015 | Landed Volume | 130.24 | tonnes | 2016 | Landed Volume | 108.12 | tonnes | 2017 | Landed Volume | 110.21 | tonnes | 2018 | Landed Volume | 140.99 | tonnes | 2019 |
Bio Assess Data The assessment was carried out using official landings and data on the size composition of trawl catches for 2002-2019. Catch-at-length data were converted into catch-at-age data by cohort slicing procedures. Length-weight relationship and maturity ogive come from the Spanish DCF and natural mortality vector was estimated using PRODBIOM (Abella et al., 1997). Assess Models Type: Age-structured a4a The state of exploitation of this stock was assessed by means of VPA XSA (Shepherd, 1999) and SCAA model (a4a) (Jardim and Millar, 2014). The assessment was performed using abundance index series from MEDITS trawl surveys. Y/R analyses was conducted based on the exploitation pattern resulting from a4a model and population parameters. Results R declined until 2007 and has been relatively stable over the 2008-2015 period, increasing in the last two years. SSB showed a decreasing trend in 2015-2017 period, increasing in the last year. Fishing mortality (Fbar 0-2) with values close to 1 in the 2007-2017 period, going up to 1.27 in the last year. Sci Advice Reduce 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/ |
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