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| Marine Resource Fact Sheet |
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| Red shrimp - Northern Spain, 2010 |
 | Aristeus antennatus - Northern Spain |
| | Owned by | General Fisheries Commission for the Mediterranean (GFCM) More |
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| Related observations | Locate in inventory | | | | Species: | | FAO Names : en - Blue and red shrimp, fr - Crevette rouge, es - Gamba rosada |
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| Geographic extent of Red shrimp - Northern Spain
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 | GFCM geographical sub-areas |
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| 6 | Northern Spain |
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| Main Descriptors | Considered a single stock: Biological Stock
Spatial Scale: Sub-Regional
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| Considered a single stock: A group of individuals in a species occupying a well defined spatial range independent of other stocks of the same species. It can be affected by random dispersal movements and directed migrations due to seasonal or reproductive activity. |
| Spatial Scale: Spatial scale contains a standard term such as Global, Regional (e.g. for the whole Atlantic), sub-regional (e.g. for a part of the Atlantic), national, local (for sub-national levels). |
| 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. |
| | | | | | Habitat and Biology Climatic zone: Temperate. Bottom type: Soft bottom. Depth zone: Slope 200 1000m. Horizontal distribution: Neritic. Vertical distribution: Demersal/Benthic. Geographical Distribution Jurisdictional distribution: Straddling between High Seas and EEZ Water Area Overview Spatial Scale: Sub-Regional Northern SpainGeo References | | Geographic extent of Red shrimp - Northern Spain
| GFCM geographical sub-areas | 6: Northern Spain |
| | | | | | Other georeferences
| FAO Fishing Statistical Division Areas | 37.1.1: Balearic |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Red shrimp - Northern Spain Resource Structure Considered a single stock: Aq Res Struct Exploitation Trawl fleets fishing effort of the Santa Pola port were quite stable for the period studied with small variations of the number of vessels in recent years. Vessel length was between 12 and 24 m. The gears used corresponded to a trawl net 60 and 100 longest ropes. The vertical opening was between 1-3 m. The cod end mesh size used was a diamond 40 mm of mesh opening. The net was rigged two doors between 500-800 kgs. Trawl fleet in Santa Pola port do daily trips with a unique haul directed to the red shrimp, with duration between 5-7 hours. The number of harbours with red shrimp fleets is 14 for the whole area, and the number of boats in this area is 130. Discards of the red shrimp are null. Total landings in the GSA6 (1996-2010) were around 8617 t and were produced by a total effort of 280862 fishing days*vessel (number of days*vessel). For this period, landings arise around 574 tonnes and total effort over 18724 fishing days by year. Assessment Data Size composition of commercial trawl catches and official landings, CPUE (catch per unit effot) data from MEDITS surveys and commercial fleet. Growth parameters, L-W and age-length relationships were taken from Garcia-Rodríguez, M (2003). Assessment Model Type: Age-structured Extended survivors analysis (XSA) Methodology The male and female length distributions for year (1996-2010) were split using L2 age, slicing ICES package to ages. It was run a tuned VPA (Virtual Population Analysis) and XSA for male for male and for male and female together Results The comparison between VPA and XSA of 2009 and 2010 assessments showed small differences with continuous slight decreasing values for the SSB (Spawning Stock Biomass), Recruitment and Fishing mortality. Using male and female together, log catchability residuals show small fluctuations more accused in first age class. The retrospective analysis doesn’t show great dispersion over the years and in general, the structure is similar in all the cases (male, female and male-female together). Assessment Model Type: Others Predictive model Yield per Recruit (Y/R) Results Y/R analysis were made for the average size distribution landings for male and female together for the years 1996-2010, assuming the current steady state exploitation pattern. Results of equilibrium Y/R and SSB/R estimated the current exploitation close to the maximum. F ref= 1.3343 F max= 0.4937 F 0.1= 0.2802 Overall Assessment Results Exploitation rate show a high F and the stock abundance is low. Scientific Advice For management considerationTo reduce F by 72% this can be achieved with a reduction in effort capacity and improving the selection pattern. Implementing areas closed to fishing in the nursery areas during the recruitment period. Biological State and Trend Exploitation state: OverexploitedExploitation rate: High fishing mortality
Abundance level: Low abundance The stock is in overfishing status. Source of information Report of the Working Group on Stock Assessment of Demersal Species. FAO-GFCM Chania, Crete (Greece) 24-29 October 2011. 2011 FAO  . |
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