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Fact Sheet Title Fact Sheet |
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Striped red mullet - South Levant Sea |
Mullus surmuletus - South Levant Sea (GSA 26) |
| 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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ident Block | ident Block | | Species List: | Species Ref: en - Surmullet, fr - Rouget de roche, es - Salmonete de roca, ar - طرستوج الصّخرة، سمك السّلطان سليمان الصّخريّ, zh - 纵带羊鱼 |
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Aq Res | Biological Stock: No Value: Sub-Regional Management unit: Yes Reference year: 2019
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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. |
Reference Year: The Reference Year is the last year considered in the stock assessment and/or fishery status. |
| | | | Aq Res State Trend In overexploitation and overexploited. [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: Hard bottom. Depth Zone: Coastal (0 m - 50 m); Shelf (50 m - 200 m). Horizontal Dist: Neritic; Littoral. Vertical Dist: Demersal/Benthic. Water Area Overview Spatial Scale: Sub-Regional Water Area Overview | Water Area Overview Striped red mullet - South Levant Sea
| | | | Water Area Overview
| | | | Water Area Overview |
Water Area OverviewStriped red mullet - South Levant Sea 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 The striped red mullet is one of the important commercial species in the Mediterranean waters of Egypt (GSA 26). Its landings were 779 tonnes in 2014, 529 tonnes in 2015, 479 tonnes in 2017 and 380 tonnes in 2019. Five species (striped red mullet, red mullet, goldband goatfish, Por's goatfish ( Upeneus pori) and the Red Sea goatfish ( Parupeneus forsskali) of the family Mullidae were recorded in the catch of Egyptian Mediterranean (GSA 26). The landed catch of striped red mullet came mainly from the trawl vessels and constituted about 33 percent of the goatfishes in GSA 26, according to the species composition estimated from personal pilot survey. Bio Assess Data The sampling process was within a fisheries data collection system supported by the FAO EastMed project. Monthly samples were collected from landings during the period from the beginning of 2011 to the end of 2012, and during 2016. In 2013, 2015, 2017 and 2019, sampling was on a bimonthly basis. The monthly LFDs were raised to the monthly landings and analysed by the electronic length frequency analysis for estimating growth parameter (ELEFAN) program incorporated in LFD analysis software for the estimation of growth parameters for the sexes combined. The length-weight relationship, the length at first maturity (L50) and the sex ratio were also studied. ProdBiom was used to estimate natural mortalities. Assess Models Type: Size-structured VIT VIT software was used for pseudo cohort analysis. In addition, the Y/R analysis implemented in the VIT was applied for the calculation of the reference point F0.1. LBSPR and LIME were used as additional methods to support the findings of VIT. Results Sex ratio (percent females / total) was 0.43 during the study period. The stock of each year was assessed separately to compare results. Age composition analysis indicates that the majority of the catch of this species is represented by age groups 1, 2 and 3. The Y/R analysis indicated a current level of fishing mortality as 0.497 for 2019, while the target reference point F 0.1 was around 0.29 during the years of study. The ratio between Fc and F0.1 was 1.69. Sci Advice Reduce fishing mortality. Management Management unit: Yes Sources 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. 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.pdf |
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