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Fact Sheet Title Fact Sheet |
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Blue and red shrimp - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia |
Aristeus antennatus - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia (GSAs 9-11) |
| 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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Monitoring Range Min2019. ident Block | ident Block | | Species List: | Species Ref: en - Blue and red shrimp, fr - Crevette rouge, es - Gamba rosada |
Species Ref Type: Measure |
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| ident Block Blue and red shrimp - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia Aq Res Ident Aq Res Ident Aq Res Ident gfcm Sub Area |
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9 | Ligurian Sea and North Tyrrhenian Sea |
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10 | Southern and Central Tyrrhenian Sea |
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11 | Sardinia |
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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 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 1000m; Abyssal >1000m. Horizontal Dist: Neritic; Oceanic. Vertical Dist: Demersal/Benthic. Water Area Overview Spatial Scale: Spatial Scale Water Area Overview | Water Area Overview Blue and red shrimp - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia
gfcm Sub Area | 9: Ligurian Sea and North Tyrrhenian Sea | 10: Southern and Central Tyrrhenian Sea | 11: Sardinia |
| | | | Water Area Overview
fao Div | 37.1.1: Balearic | 37.1.3: Sardinia |
| | | | Water Area Overview |
Water Area OverviewBlue and red shrimp - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia 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 In the Mediterranean, blue and red shrimp is a dominant species of bathyal megafaunal assemblages, and it is sympatric with giant red shrimp. Both species have considerable interest for fisheries. Blue and red shrimp is one of the most important target species of the fishery carried out on the muddy bottoms of the upper and middle slope. The species is almost exclusively exploited with otter bottom trawling. In the past, in particular in GSA 10 gillnets were targeting blue and red shrimp associated with very low landings (less than 1.5 tonnes). The assessment of blue and red shrimp carried out considering the stock shared by GSAs 9, 10 and 11. Fishery Indicator Fishery Indicator | Fishery Indicator | Fishery Indicator | Fishery Indicator | Fishery Indicator |
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Type | Measure | 247 | tonnes | 2006 | Measure | 197 | tonnes | 2007 | Measure | 154 | tonnes | 2008 | Measure | 192 | tonnes | 2009 | Measure | 248 | tonnes | 2010 | Measure | 288 | tonnes | 2011 | Measure | 290 | tonnes | 2012 | Measure | 231 | tonnes | 2013 | Measure | 216 | tonnes | 2014 | Measure | 194 | tonnes | 2015 | Measure | 216 | tonnes | 2016 | Measure | 278 | tonnes | 2017 | Measure | 359 | tonnes | 2018 | Measure | 366 | tonnes | 2019 |
Bio Assess Data Size composition of commercial trawl catches and official landings (2006-2019), and MEDITS survey indices (2006-2019). Growth parameters and maturity ogive were gathered from the Italian National Data Collection Programme, while the M vector was estimated using the Chen and Watanabe model. Assess Models Type: Age-structured a4a SCAA (a4a, FLR libraries), FLBRP package for Y/R analysis and Flash package for short-term forecast. Results Stock biomass showed oscillations for the entire data series, with a general decreasing trend. Recruitment is also decreasing, and showed a peak in 2009 and 2016. F has been slightly decreasing, constant in the last period, but then increasing in the last years of the time series. Sci Advice Reduce fishing mortality; STF available. 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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