Fisheries and Resources Monitoring System

EspañolFrançais
Roundnose grenadier - Mid-Atlantic Ridge
Marine Resource  Fact Sheet
ICES Advice 2009
Roundnose grenadier - Mid-Atlantic Ridge
Fact Sheet Citation  
Roundnose grenadier on Mid-Atlantic Ridge (Areas Xb, XIIc, Va, XIIa and XIVb)
Owned byInternational Council for the Exploration of the Sea (ICES) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - Roundnose grenadier, fr - Grenadier de roche, es - Granadero de roca, ru - Макрурус тупорылый
Geographic extent of Roundnose grenadier - 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

The state of the stock is uncertain. Soviet data suggested a high biomass in the 1970–1980s. Cpue data suggest an overall decline in catch rates after the 1970s (Figure 9.4.15.3.1). A Russian trawl acoustic survey in 2003 showed relatively low biomass of the pelagic component of the stock, an increasing depth of the aggregations, and a higher number of small immature fish.
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

There is a licensing scheme and effort limitation in Divisions XIIc and Xb, and in Subdivisions XIIa1, XIVb1, and Va1.
Assessment
 
Assessment Model
Methodology

Scientific basis

The only available information for the Mid-Atlantic Ridge is the catch statistics and a cpue series from the Soviet/Russian official data (Figure 9.4.15.3.1). The most recent Russian trawl acoustic survey was carried out in 2003 in the area between 47°N and 58°N.
Overall Assessment Results


Table 9.4.15.3.1. Roundnose grenadier catches (t) by area and country on the MAR.
  Va1 Xb   XIIa1+XIIc     XIVb1    
Year USSR/ Russia USSR/ Russia Faroes2) USSR/ Russia Poland2) Latvia2) Faroes2) USSR/ Russia Spain2) Total
1973 820     226           1046
1974 12561     5874           18435
1975       29894           29894
1976   170   4545       11   4726
1977       9347           9347
1978       12310           12310
1979       6145           6145
1980       17419           17419
1981       2954           2954
1982       12472       153   12625
1983       10300           10300
1984       6637           6637
1985       5793           5793
1986       22842           22842
1987       10893           10893
1988       10606           10606
1989       9495           9495
1990       2838           2838
1991       32141)   4296       7510
1992       295   1684       1979
1993     249 473   2176 263     3161
1994           675 457     1132
1995             359     359
1996     3 208     136     347
1997     1 705 5867   138 336   7047
1998     1 812 6769   19     7601
1999     3 576 546   29     1154
2000       2325       5   2330
2001       1714     2 69   1785
2002       737       4 235 976
2003       510         272 782
2004     1 436     8 201)   465
2005   799   600           1399
2006             1     1
2007*             2     2
1– revised catch data. 2– official ICES data. *– preliminary data.


Table 9.4.15.3.2. Roundnose grenadier catches (t) by area on the MAR.
Year Va1 Xb XIIa1+XIIc XIVb1 Grand Total
1973 820   226   1046
1974 12561   5874   18435
1975     29894   29894
1976   170 4545 11 4726
1977     9347   9347
1978     12310   12310
1979     6145   6145
1980     17419   17419
1981     2954   2954
1982     12472 153 12625
1983     10300   10300
1984     6637   6637
1985     5793   5793
1986     22842   22842
1987     10893   10893
1988     10606   10606
1989     9495   9495
1990     2838   2838
1991     7510   7510
1992     1979   1979
1993   249 2912   3161
1994     1132   1132
1995     359   359
1996   3 344   347
1997   1 6710 336 7047
1998   1 7600   7601
1999   3 1151   1154
2000     2325 5 2330
2001     1716 69 1785
2002     737 239 976
2003     510 272 782
2004   1 444 20 465
2005   799 600   1399
2006     1   1
2007*     2   2
*– preliminary data.


Figure 9.4.15.3.1. International catch and Soviet/Russian cpue of roundnose grenadier on the MAR in 1973–2007.

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. Fisheries on such species should always be accompanied by programmes to collect data on both target and bycatch fisheries. The fishery should not be allowed to expand from the current low level unless it can be shown that it is sustainable.
Management
 
Management Objectives

There are no management objectives for this stock.
Management Advice

Management considerations

In addition to their low productivity, roundnose grenadier on the Mid-Atlantic Ridge (Areas Xb, XIIc, Va1, XIIa1, and XIVb1) and Division Va exhibit spatial distributions associated with seamounts and aggregating behaviour. These grenadiers are therefore easily overexploited. Landings from this area appear to be low in recent years, but the quality of the landings data is suspect.

Catches in subareas on the Mid-Atlantic Ridge are believed to be underestimated due to misreporting.
Source of information
 
ICES.2009.Report of the ICES Advisory Committee, 2009. ICES Advice, 2009.
powered by FIGIS  © FAO, 2019
Powered by FIGIS
crawl