Fishery Resources Monitoring System

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Roundnose grenadier - Skagerrak and Kattegat, 2008
Marine Resource  Fact Sheet
ICES Advice 2009
Roundnose grenadier - Skagerrak and Kattegat, 2008
Fact Sheet Citation  
Roundnose grenadier in Division IIIa
Owned byInternational Council for the Exploration of the Sea (ICES) – More
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Species:
FAO Names: en - Roundnose grenadier, fr - Grenadier de roche, es - Granadero de roca, ru - Макрурус тупорылый
Geographic extent of Roundnose grenadier - Skagerrak and Kattegat
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Sub-Regional
 
 
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
Exploitation
 

Factors affecting the fisheries and the stock

Regulations and their effects

The northern part of ICES Subdivision IIIa (Skagerrak) is shared between the EU and Norway. However, according to the tri-lateral treaty between Denmark, Norway, and Sweden (Skagerrak Treaty) fishing vessels from each of the three countries may operate freely in each country’s waters. The directed fishery for grenadier is mainly carried out in the Norwegian EEZ, and the fishery has been largely unregulated and unrestricted. The EC introduced unilateral TACs for IIIa in 2004 and 2005, but this restriction did not apply in the Norwegian EEZ, for which the trilateral Skagerrak treaty between Denmark, Norway, and Sweden is in force. The Skagerrak treaty allows Danish and Swedish vessels to operate freely in the Norwegian zone, and Norway has not set any TAC or introduced other regulations on grenadier fishing in IIIa or IVa. Therefore, the Danish (and Swedish) fleet(s) could in principle fish unrestricted by the (EU) TAC for grenadier in these waters.

Following an agreement between the EU and Norway in February 2006, a TAC of 2700 t for the EU in 2006 was set for IIIa including the Norwegian EEZ.
Assessment
 
Assessment Model
Methodology

Scientific basis

No assessment was carried out for this stock and interpretation of the current status was based on landings (Figure 9.4.15.1.1), cpue (Figure 9.4.15.1.2), and mean length in catches (Figure 9.4.15.1.3). More scientific data to elucidate the productive features of this stock is needed to explain the special development of the exploitation of this management unit.

Comparison with previous assessment and advice

There is no change in the advice for this stock.
Overall Assessment Results


Table 9.4.15.1. Total landings (tonnes) of roundnose grenadier from Divisions IIIa & IVa (WG estimates).
Year Denmark Norway Sweden TOTAL
1988 612   5 617
1989 884   1 885
1990 785 280 2 1067
1991 1214 304 10 1528
1992 1362 211 755 2328
1993 1455 55   1510
1994 1591   42 1633
1995 2080   1 2081
1996 2213     2213
1997 1356 124 42 1522
1998 1490 329   1819
1999 3113 13   3126
2000 2400 4   2404
2001 3067 35   3102
2002 4196 24   4220
2003 4302     4302
2004 9874 16   9890
2005 11922     11922
2006 2261 4   2265
2007* + 1   1
* Preliminary data.


Figure 9.4.15.1.1. Total landings of roundnose grenadier from Divisions IIIa & IVa (WG estimates).


Figure 9.4.15.1.2. Danish cpue by main ICES rectangle in Division IIIa based on logbook records.


Figure 9.4.15.1.3. Length distribution Danish catches of roundnose grenadier in 1987, 2004, and 2005. Note: 1987 consists of combined data from research vessel and fishery.

Reference Point
 

No reference points have been defined for this stock.
Scientific Advice

Single-stock exploitation boundaries

Due to its low productivity, roundnose grenadier can only sustain low rates of exploitation. ICES reiterates the advice to constrain catches to 1000 t, which corresponds to the catch level before the expansion of the fishery (1988–1991). The fishery should not be allowed to expand again unless it can be shown that it is sustainable.
Management
 
Management Objectives

There is no management objective for this stock.
Management Advice

Management considerations

At present there is no fishery, but any future directed fisheries should be managed on a precautionary basis and monitored closely in order to ensure sustainability of the exploitation of this stock.

The period before the expansion of the fishery is equal to the years 1988–1991.
Biological State and Trend
Exploitation rate: Undefined
Abundance level: Undefined

It has not been possible to assess the status of the stock. However, as scientific investigations have indicated slow growth of this species, the drastic increase in exploitation of this stock during the years 2003–2005 gave rise for serious concern, even if no clear signs of the increasing fishing pressure were observed in recent years. No directed fishery has taken place since 2007, due to retirement of the fishers. A decrease in mean length in the catch from 1987 to 2004 and 2005 indicates heavy exploitation on this stock, see Figure 9.4.15.1.3.
Source of information
 
ICES.2009.Report of the ICES Advisory Committee, 2009. ICES Advice, 2009.
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