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Tusk - Mid-Atlantic Ridge
Marine Resource  Fact Sheet
ICES Advice 2009
Tusk - Mid-Atlantic Ridge
Fact Sheet Citation  
Tusk on Mid-Atlantic Ridge (Areas Xb, XIIc, Va, XIIa and XIVb)
Owned byInternational Council for the Exploration of the Sea (ICES) – More
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Species:
FAO Names: en - Tusk(=Cusk), fr - Brosme, es - Brosmio, ar - بروسمة, zh - 单鳍鳕, ru - Менек (=морской налим)
Geographic extent of Tusk - Mid-Atlantic Ridge
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Sub-Regional
Reference year: 2008
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateUndefinedUncertain/Not assessed
Abundance levelUndefinedUncertain/Not assessed

Fisheries in this area take very small catches of tusk. There is no information on the state of the stock.
Habitat and Biology
Depth zone: Slope (200 m - 1000 m).   Vertical distribution: Demersal/Benthic.  

Water Area Overview
Spatial Scale: Sub-Regional

Geo References
Resource Structure
Considered a single stock: Yes
Assessment
 
Assessment Model
Methodology

Scientific basis

Catches from this area have been small and no scientific analyses have been carried out.

Comparison with previous assessment and advice

This is the first time advice has been given for this area. Previous advice was given for all areas combined.
Overall Assessment Results


Table 9.4.12.3.1. Tusk XII. WG estimate of landings. Note: catches in XIIb (Hatton Bank) may be included in these data.
TUSK XII              
Year Faroes France Iceland Norway Scotland Russia Total
1988   1         1
1989   1         1
1990   0         0
1991   1         1
1992   1         1
1993   12 +       12
1994   1 +       1
1995 8 - 10       18
1996 7 - 9 142     158
1997 11 - + 19     30
1998   1   -     1
1999   1   + 1   1
2000       5 +   5
2001   1   51 +   52
2002     27     27
2003       83     83
2004 2 2   7   5 16
2005 2 1         3
2006   0       64 64
2007*   0       19 19
*Preliminary.


Figure 9.4.12.3.1. Tusk XII. WG estimate of landings (tonnes). Note: catches in XIIb (Hatton Bank) may be included in these data.

Reference Point
 

Reference points for this stock have not been calculated. Reference points that were previously suggested for tusk would be based on unexploited abundance; however, the data to calculate this point do not exist.
Scientific Advice

Single-stock exploitation boundaries

Fisheries on tusk should be accompanied by programmes to collect data on both target and bycatch fish.

Fisheries should not be allowed to expand unless there is information that can be used to evaluate a long-term sustainable level of exploitation.
Management
 
Management Advice

Management considerations

Catches of tusk are reported for Area XII and may include catches in Area XIIb (Hatton Bank).

Tusk is a bycatch species in the gillnet and longline fisheries in Subarea/Division XII. In the last two years only Russia has reported catches of tusk. During the period 1996 to 2004 Norway also had a fishery in this area.
Source of information
 
ICES.2009.Report of the ICES Advisory Committee, 2009. ICES Advice, 2009.
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