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European hake - Northern Spain
Fact Sheet Title  Fact Sheet
Stock status report 2021
European hake - Northern Spain
Fact Sheet Citation  
Merluccius merluccius - Northern Spain (GSA 6)
Owned byGeneral Fisheries Commission for the Mediterranean (GFCM) – ownership
ident Blockident Blockdisplay tree map
 
Species List:
Species Ref: en - European hake, fr - Merlu européen, es - Merluza europea, ru - Мерлуза восточноатлантическая

Fishery Indicators
Production: Catch
ident Block European hake - Northern Spain
Aq Res
Biological Stock: No         Value: Sub-Regional
Management unit: Yes        Reference year: 2019
 
 
Aq Res State Trend
Aq Res State Trend
Aq Res State Trend Aq Res State Trend
Aq Res State TrendIn overexploitation (F/Fref = 8.57)Not applicable
Aq Res State TrendRelatively low biomassNot applicable
Aq Res State Trend
Aq Res State TrendOverfished

In overexploitation, with relatively low 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 Bio
Climatic Zone: Temperate.   Bottom Type: Soft bottom; Hard bottom.   Depth Zone: Shelf (50 m - 200 m); Slope (200 m - 1000 m).   Horizontal Dist: Neritic.   Vertical Dist: Demersal/Benthic.  

Water Area Overview
Spatial Scale: Sub-Regional

Water Area Overview
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
 

European hake is a target demersal species of the Mediterranean fishing fleets. It is largely exploited in GSA 6, mainly by trawlers on the shelf and slope (95 percent landings), but also by small-scale fisheries using long lines (2 percent) and gillnets and trammel nets (3 percent) (average percentages estimated between 2016 and 2019). According to official statistics, around 1 000 boats are involved in this fishery, with total annual landings oscillating around 1 900 tonnes for the period 2016-2019 (1 628 tonnes in 2019). The trawler fleet is the largest in number of boats (419) and landings (1 512 tonnes) in 2019.
Fishery Indicators
TypeMeasureValueUnitTime period
ProductionCatch 1628tonnes2019
Catch 2443tonnes2018
Catch 1728tonnes2017
Catch 1810tonnes2016
Catch 1726tonnes2015
Catch 2489tonnes2014
Catch 2950tonnes2013
Catch 2641tonnes2012
Catch 3182tonnes2011
Catch 2822tonnes2010
Catch 3847tonnes2009
Catch 3341tonnes2008
Catch 2540tonnes2007
Catch 3627tonnes2006
Catch 3473tonnes2005
Catch 3151tonnes2004
Catch 4633tonnes2003
Catch 2835tonnes2002
Bio Assess
 

Complimentary advice. The basis for advice is a joint assessment of GSAs 1, 5, 6, 7.
Data

The assessment was carried out using official landings and data on the size composition of trawl, longlines and set gillnet catches for the years 2002-2019. Abundance index series from MEDITS surveys were used as indices of abundance independent of the fishery.
Assess Models
Type:  Age-structured
a4a

Both XSA and a4a were used. Additionally, Y/R analysis was carried out. The final model considered for the assessment was a4a.
Results

Total biomass (B) and yield (Y) showed a general decreasing trend from 2002 to 2019. R showed a drastic decline from the maximum observed in 2002. Fishing mortality (Fbar0-2) shows a slight increase until 2013 and a decreasing trend until 2018, followed by a slight increase until 2019 when estimated F is 1.2.
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.  Click to openhttps://www.fao.org/3/cb7622en/cb7622en.pdf
Report of the Working Group on Stock Assessment of Demersal Species (WGSAD). Online, 18–23 January 2021.  Click to openhttps://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.  Click to openhttps://www.fao.org/3/cb2427en/cb2427en.pdf
FAO. 2016. The State of Mediterranean and Black Sea Fisheries. General Fisheries Commission for the Mediterranean. Rome, Italy.  Click to openhttps://www.fao.org/3/i5496e/i5496e.pdf
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 openhttps://www.fao.org/3/i4381b/i4381b.pdf
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