Fisheries and Resources Monitoring System

Blue and red shrimp - Balearic Islands
Marine Resource  Fact Sheet
Stock status report 2021
Blue and red shrimp - Balearic Islands
Fact Sheet Citation  
Aristeus antennatus - Balearic Islands (GSA 5)
Owned byGeneral Fisheries Commission for the Mediterranean (GFCM) – More
Related observationsLocate in inventorydisplay tree map
FAO Names: en - Blue and red shrimp, fr - Crevette rouge, es - Gamba rosada
Geographic extent of Blue and red shrimp - Balearic Islands
Main Descriptors
Considered a single stock: No        Spatial Scale: Sub-Regional
Management unit: Yes        Reference year: 2019
Biological State and Trend
State & Trend Descriptors
Exploitation rateIn overexploitation (F/Fref = 3.75)Not applicable
Abundance levelRelatively intermediate biomassNot applicable
FAO Categories
Exploitation stateOverfished

In overexploitation, with relatively intermediate biomass.
[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 and Biology
Climatic zone: Temperate.   Bottom type: Soft bottom.   Depth zone: Slope (200 m - 1000 m); Abyssal ( >1000m).   Horizontal distribution: Neritic; Oceanic.   Vertical distribution: Demersal/Benthic.  

Water Area Overview
Spatial Scale: Sub-Regional

Geo References
Resource Structure
Considered a single 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]

In the Balearic Islands, commercial bottom trawlers develop up to four different fishing tactics, which are associated with the shallow shelf, deep shelf, upper slope and middle slope, mainly targeting: i) picarel, striped red mullet, common octopus, and a mixed fish category on the shallow shelf (50-80 m); ii) European hake, Mullus spp., john dory, and a mixed fish category on the deep shelf (80-250 m); iii) Norway lobster, but with an important bycatch of big European hake, Lepidorhombus spp., Lophius spp. and blue whiting on the upper slope (350-600 m) and iv) blue and red shrimp on the middle slope (600-750 m). Blue and red shrimp is a target species with a high economic importance.

Size composition of commercial trawl catches and official landings (1992-2019) and CPUE data from bottom trawl surveys (2001-2019). Growth parameters, length-weight relationship and maturity ogive obtained in the study area (Carbonell et al. al., 1999, DCF data). Length was transformed to age by sex and the combined results were used for the assessment.
Assessment Model
Type:  Age-structured

SCAA (a4a, FLR) and Y/R (FLRBRP package).
Overall Assessment Results

Recruitment showed oscillations along the data series, with an increasing trend since the minimum values in 2014. SSB also showed a slightly increasing trend, after a minimum in 2015. F values were stable for the last four years of the data series.
Scientific Advice

Reduce fishing mortality. STF available.
Management unit: Yes
Source of information
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.  Click to open
Report of the Working Group on Stock Assessment of Demersal Species (WGSAD). Online, 18–23 January 2021.  Click to open
Stock assessment form for blue and red shrimp in GSA 5 (reporting year: 2021).  Click to open
FAO. 2020. The State of Mediterranean and Black Sea Fisheries 2020. General Fisheries Commission for the Mediterranean. Rome.  Click to open
FAO. 2016. The State of Mediterranean and Black Sea Fisheries. General Fisheries Commission for the Mediterranean. Rome, Italy.  Click to open
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 open
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