FIRMS - Marine Resource fact sheets - Dentex

Dentex - São Tomé e Príncipe

Fact Sheet Title Fact Sheet

CECAF Scientific advice 2016

Dentex - São Tomé e Príncipe

Dorade (Dentex spp) - Sao Tomé-et-Principe

Owned by

Food and Agriculture Organization (FAO) – ownership

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Species List:

Dentex spp

Species Ref: en - Dentex nei, fr - Dentés nca, es - Dentones y samas nep, ru - Зубаны

Fishery Indicators
Production: Catch

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Aq Res
Biological Stock: Yes Value: National Management unit: Yes Reference year: 2010

Table of Contents

Habitat Bio - Geo Dist - Water Area Overview - Aq Res Struct - Bio Assess - Aq Res State Trend - Exploit - Sources

Aq Res State Trend

Aq Res State Trend
	Aq Res State Trend
Aq Res State Trend	Uncertain/Not assessed

Habitat Bio

Climatic Zone: Tropical. Depth Zone: Shelf - Deepshelf (100 m - 200 m). Vertical Dist: Demersal.

Geo Dist

Geo Dist: National

Water Area Overview

Spatial Scale: National

Water Area Overview

Aq Res Struct

Biological Stock: Yes

Dentex spp. is not important in the catches in Nigeria and Cameroon. Therefore the Working Group considered only the stock in Sao Tome & Principe.

Exploit

Fishery Indicators

Type	Measure	Value	Unit	Time period
Production	Catch	148	tonnes	2001
	Catch	153	tonnes	2002
	Catch	160	tonnes	2003
	Catch	166	tonnes	2004
	Catch	168	tonnes	2005
	Catch	173	tonnes	2006
	Catch	178	tonnes	2007
	Catch	183	tonnes	2008
	Catch	188	tonnes	2009

Bio Assess

Assessment year: 2011
The CECAF Working Groups have adopted the following Biological Reference Points (BRPs):
- Limit Reference points: BMSY and FMSY
- Target Reference Points: B0.1 and F0.1
Stock status is assigned based on current estimates of fishing mortality (Fcur) and biomass (Bcur) relative to these target and limit reference points (Bcur/BMSY, Fcur/FMSY, Bcur/B0.1, Fcur/F0.1). The results from the stock assessment of this stock are found under the “Biological state and trend section”.

Assess Models

Type: Biomass-aggregated

Schaefer dynamic production model

The Working Group used the total catches of Dentex spp. for Sao Tome & Principe from 2001 to 2010 and CPUE (artisanal – number of fishermen) for the same number of years.

Results

The model was attempted but rejected because the CPUE used was not in the appropriate format and did not provide a satisfactory fit.

Sci Advice

The Working Group was not in a position to recommend any specific management measure. Nevertheless, it recommends proceeding with an indepth analysis of the data before the next Working Group meeting.

Management

Management unit: Yes

Sources

FAO. 2016. Fishery Committee for the Eastern Central Atlantic, Report of the seventh session of the Scientific Sub-Committee, Tenerife, Spain, 14–16 October 2015 / Comité des pêches pour l’Atlantique Centre-Est Rapport de la septième session du Sous-Comité scientifique. Tenerife, Espagne 14-16 octobre 2015. FAO Fisheries and Aquaculture Report / FAO Rapport sur les pêches et l’aquaculture No. 1128. Rome, Italy.

http://www.fao.org/3/I5301Bi/i5301bi.pdf

FAO. 2015. Report of the FAO/CECAF Working Group on the Assessment of Demersal Resources – Subgroup South. Accra, Ghana, 15–24 November 2011 / Rapport du Groupe de travail FAO/COPACE sur l’évaluation des ressources démersales – Sous-groupe Sud. Accra, Ghana, 15-24 novembre 2011. CECAF/ECAF Series/COPACE/PACE Séries. No. 15/76. Rome, Italy/Italie.

http://www.fao.org/3/a-i5138b.pdf

Fisheries and Resources Monitoring System