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Blue and red shrimp - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia
Fact Sheet Title  Fact Sheet
Stock status report 2021
Blue and red shrimp - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia
Fact Sheet Citation  
Aristeus antennatus - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia (GSAs 9-11)
Owned byGeneral Fisheries Commission for the Mediterranean (GFCM) – ownership
Monitoring Range Min2019.
ident Blockident Blockdisplay tree map
 
Species List:
Species Ref: en - Blue and red shrimp, fr - Crevette rouge, es - Gamba rosada

Fishery Indicators
Production: Catch
ident Block Blue and red shrimp - Ligurian Sea and Northern Tyrrhenian Sea, Southern and Central Tyrrhenian Sea, Sardinia
Aq Res
Biological Stock: No         Value: Sub-Regional
Reference year: 2019
 
 
Aq Res State Trend
Aq Res State Trend
Aq Res State Trend Aq Res State Trend
Aq Res State TrendIn overexploitation (F/Fref = 5.39)Not applicable
Aq Res State TrendNot applicable
Aq Res State Trend
Aq Res State TrendOverfished

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
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
 

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 Indicators
TypeMeasureValueUnitTime period
ProductionCatch 247tonnes2006
Catch 197tonnes2007
Catch 154tonnes2008
Catch 192tonnes2009
Catch 248tonnes2010
Catch 288tonnes2011
Catch 290tonnes2012
Catch 231tonnes2013
Catch 216tonnes2014
Catch 194tonnes2015
Catch 216tonnes2016
Catch 278tonnes2017
Catch 359tonnes2018
Catch 366tonnes2019
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. Click to openhttps://www.fao.org/3/cb7622en/cb7622en.pdf
Report of the Working Group on Stock Assessment of Demersal Species (WGSAD). Online, 18–23 January 2021. Click to openhttps://www.fao.org/gfcm/technical-meetings/detail/en/c/1412431/
GFCM Stock Assessment Results (STAR) for blue and red shrimp in GSAs 9-11 (reporting year: 2021). Click to openhttps://gfcm.sharepoint.com/EG/_layouts/15/download.aspx?share=EZdS6cZZ-1ROko660_4_6_cB-jMCIMdECsmkNbSpDnWl1w
Bibliography
 
FAO. 2020. The State of Mediterranean and Black Sea Fisheries 2020. General Fisheries Commission for the Mediterranean. Rome. Click to openhttps://www.fao.org/3/cb2427en/cb2427en.pdf
FAO. 2016. The State of Mediterranean and Black Sea Fisheries. General Fisheries Commission for the Mediterranean. Rome, Italy. Click to openhttps://www.fao.org/3/i5496e/i5496e.pdf
FAO 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. Click to openhttps://www.fao.org/3/i4381b/i4381b.pdf
General Fisheries Commission for the Mediterranean (GFCM) Stock Assessment Results (STAR). Click to openhttps://www.fao.org/gfcm/data/star/en/
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