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| Marine Resource Fact Sheet |
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| Striped red mullet - Northern Tunisia, Gulf of Hammamet, Gulf of Gabes, 2006 |
 | Mullus surmuletus - Northern Tunisia, Gulf of Hammamet, Gulf of Gabes |
| | Owned by | General Fisheries Commission for the Mediterranean (GFCM)
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| Main Descriptors | Considered a single stock: No
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: Hard bottom. Depth zone: Shelf 50 200m. Horizontal distribution: Neritic; Littoral. Vertical distribution: Demersal/Benthic. Geographical Distribution Jurisdictional distribution: Shared between nations Water Area Overview Spatial Scale: Sub-Regional Geo References  | | Distribution of Striped red mullet - Northern Tunisia, Gulf of Hammamet, Gulf of Gabes
| GFCM geographical sub-areas | 12: Northern Tunisia |
| | | | | | Other georeferences
| FAO Fishing Statistical Division Areas | 37.1.3: Sardinia |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Striped red mullet - Northern Tunisia, Gulf of Hammamet, Gulf of Gabes Resource Structure Considered a single stock: No Two independent stocks of red mullet in Tunisia were identified: one relative to
the Northern and Eastern and the other to the Southern part. Exploitation Information on Operational Units exploiting this resource will be soon available at the following link: GASs 12, 13, 14 Striped Red Mullet (Mullus surmuletus)Assessment Assessment Model Type: Size-structured Length cohort analysis (LCA), Yield per recruit (Y/R) The present study deals with demographic analysis of Mullus surmuletus in Tunisia by means of length composition of capture applied to the inshore trawl fishing from 2003 to 2005. The analysis of pseudo-cohort method is used Overall Assessment Results - The global fishing mortalities rate of the northern and eastern stocks were weak; wile for the southern stocks, it is moderate. The exploitation’s profile of north and east trawler and coastal fleet is orientated to mature fish; however , the southern trawlers catch essentially a juveniles before reaching the optimal size exploitation.
- The increase of actual effort would lead to a long-term a positive effect in global yield for the northern and eastern stocks. As well, this increase of effort would have a negative effect on the spawning biomass;
- For the global stock the progressive decrease of actual fishing effort at 50 % would lead to on long term important amelioration in spawning biomass; while, a negative effect in landings.
- The northern an eastern stock of striped mullet are underexploited, while, the southern stocks are in optimum exploitation.
Scientific Advice For management considerationsSCSA endorsed the WG management advice and recommendations on the
striped red mullet (Mullus surmuletus) in GSAs 12, 13 and 14. Management Management Advice Scientific advices for management consideration formulated by SCSA have been adopted by SAC. Advices and comments by SAC- Not to increase the fishing effort
- Provide fishing effort level
Biological State and Trend The global fishing mortality rates of the northern and eastern stocks are low; while for the southern stocks, they are moderate. The exploitation’s profile of north and east trawler and coastal fleet is orientated to mature fish; however, the southern trawlers catch mainly an important fraction of juveniles. Northern and eastern stocks Exploitation state: UnderexploitedExploitation rate: Low fishing mortality
Southern stock Exploitation state: Moderately exploited Source of information “Stock assessment of red shrimp (Aristeus antennatus) exploited by the Spanish trawl fishery (1996–2006) in the Geographical Sub-Area 06 (Northern Spain). In: REPORT OF THE NINTH SESSION OF THE SUB-COMMITTEE ON STOCK ASSESSMENT (SCSA)” . A. Carbonell J. L. Pérez Gil, A. Fernández, A. Esteban, M. García-Rodríguez. FAO-GFCM Kavala, Greece, 17–20 September 2007 2007 FAO  . “Report of the tenth session of the SCIENTIFIC ADVISORY COMMITTEE” FAO-GFCM Nicosia, Cyprus, 22–26 October 2007 2007 FAO . |
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