Golden Redfish - Reykjanes Ridge, 2004|
| Marine Resource Fact Sheet |
| | | | Golden Redfish - Reykjanes Ridge, 2004 |
| | Sebastes marinus in Sub-areas V, VI, XII and XIV |
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| | Owned by | International Council for the Exploration of the Sea (ICES)
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| | Related observations | Locate in inventory | | | | Species: | Sebastes marinus |  | | Fao Names : en - Golden redfish, fr - Sébaste doré, es - Gallineta dorada |
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| | Distribution of Golden Redfish - Reykjanes Ridge | |  Map legend
Area Details 
FAO Fishing Statistical Division Areas27.5.a: Atlantic, Northeast / 27.5.a 27.6.a: Atlantic, Northeast / 27.6.a 27.6.b: Atlantic, Northeast / 27.6.b 27.14.a: Atlantic, Northeast / 27.14.a 27.14.b: Atlantic, Northeast / 27.14.b FAO Fishing Statistical Subdivision Areas27.5.b.1: Atlantic, Northeast / 27.5.b.1 27.5.b.2: Atlantic, Northeast / 27.5.b.2 FAO Fishing Statistical Sub Areas27.12: Atlantic, Northeast / 27.12 More Geo References | |
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| | Main Descriptors | Considered a single stock: Yes
Spatial Scale: Sub-Regional
Considered a management unit: Yes |
| Considered a single stock: A group of individuals in a species occupying a well defined spatial range independent of other stocks of the same species. It can be affected by random dispersal movements and directed migrations due to seasonal or reproductive activity. |
| Spatial Scale: Spatial scale contains a standard term such as Global, Regional (e.g. for the whole Atlantic), sub-regional (e.g. for a part of the Atlantic), national, local (for sub-national levels). |
| Considered a management unit: An aquatic resource or fishery is
declared as [Fishery] Management Unit if it is
effectively the focus for the application of selected
management methods and measures, within the broader
framework of a management system. According to the FAO
Glossary for Responsible Fishing, "a Fishery Management
Unit (FMU) is a fishery or a portion of a fishery
identified in a Fishery Management Plan (FMP) relevant
to the FMP's management objectives." FMU's may be
organised around fisheries biological, geographic,
economic, technical, social or ecological dimensions ,
and the makeup and attribute of a fishery management
unit depends mainly on the FMP's management
objectives. |
| Jurisdictional distribution: Jurisdictional qualifier (e.g.
"shared", "shared - highly migratory") of the aquatic
resource related with its spatial distribution. |
| Environmental group: Classification of the aquatic
resource according to the environmental group (e.g.
pelagic invertebrate, or demersal fish) to which the
species belong. |
| | | | | | Habitat and Biology Depth zone: Shelf Vertical distribution: Pelagic Geographical Distribution Jurisdictional distribution: Shared between nations Water Area Overview Spatial Scale: Sub-Regional Geo References | | Distribution of Golden Redfish - Reykjanes Ridge
| FAO Fishing Statistical Division Areas | 27.5.a: Atlantic, Northeast / 27.5.a | | 27.6.a: Atlantic, Northeast / 27.6.a | | 27.6.b: Atlantic, Northeast / 27.6.b | | 27.14.a: Atlantic, Northeast / 27.14.a | | 27.14.b: Atlantic, Northeast / 27.14.b | | FAO Fishing Statistical Sub Areas | 27.12: Atlantic, Northeast / 27.12 | | FAO Fishing Statistical Subdivision Areas | 27.5.b.1: Atlantic, Northeast / 27.5.b.1 | | 27.5.b.2: Atlantic, Northeast / 27.5.b.2 |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Golden Redfish - Reykjanes Ridge | FAO major areas | 27:
Atlantic, Northeast | | (LME) Large Marine Ecosystem Areas | 19: East Greenland Shelf | | 21: Norwegian Shelf | | 22: North Sea | | 24: Celtic-Biscay Shelf | | 59 | | 60 |
Resource Structure Considered a single stock: Yes Assessment Assessment Model Assessment Model Entry Data Scientific basisData and methodsSurvey data from: the Icelandic spring groundfish survey 1985–2005 and the Icelandic autumn survey 1996–2004 in Division Va; the German groundfish survey 1985–2004 in Subarea XIV; and the Faroe spring (1994–2005) and summer (1996–2004) surveys in Division Vb are used as stock indicators in the respective areas. Data from the commercial catch in Va: length distribution, age-length key, and mean length-at-age. The spring survey data in Va and the data from the commercial catch in Va are used for tuning in the BORMICON model, which is an age- and length-based cohort model used for the assessment and medium-term projection in Va. Overall Assessment Results Total landings of Sebastes marinus in ICES Divisions V, VI, XII, and XIV Table 1.4.7.1 Official landings (in tonnes) of S. marinus,by ICES Division 1978–2004 as officially reported to ICES. Landing table
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ICES Division
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Year
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Va
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Vb
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VI
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XIV
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Total
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1978
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31,300
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2,039
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313
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15,477
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49,129
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1979
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56,616
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4,805
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6
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15,787
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77,214
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1980
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62,052
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4,920
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2
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22,203
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89,177
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1981
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75,828
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2,538
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3
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23,608
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101,977
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1982
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97,899
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1,810
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28
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30,692
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130,429
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1983
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87,412
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3,394
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60
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15,636
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106,502
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1984
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84,766
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6,228
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86
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5,040
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96,120
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1985
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67,312
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9,194
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245
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2,117
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78,868
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1986
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67,772
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6,300
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288
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2,988
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77,348
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1987
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69,212
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6,143
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576
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1,196
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77,127
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1988
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80,472
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5,020
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533
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3,964
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89,989
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1989
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51,852
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4,140
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373
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685
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57,050
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1990
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63,156
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2,407
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382
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687
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66,632
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1991
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49,677
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2,140
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292
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4,255
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56,364
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1992
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51,464
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3,460
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40
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746
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55,710
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1993
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45,890
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2,621
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101
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1,738
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50,350
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1994
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38,669
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2,274
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129
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1,443
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42,515
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1995
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41,516
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2,581
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606
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62
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44,765
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1996
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33,558
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2,316
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664
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59
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36,597
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1997
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36,342
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2,839
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542
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37
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39,761
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1998
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36,771
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2,565
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379
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109
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39,825
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1999
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39,824
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1,436
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773
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7
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42,040
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2000
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41,187
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1,498
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776
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89
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43,550
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2001
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35,067
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1,631
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535
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93
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37,326
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2002
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48,570
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1,941
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392
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189
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51,092
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2003
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36,577
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1,459
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968
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215
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39,220
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20041)
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31,738
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1,139
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519
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103
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33,498
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1)Provisional. Figure 1.4.7.1 Index on the fishable stock of S. marinus from Icelandic groundfish survey and 95% confidence intervals. The index is based on all strata at depths from 0–400 m. Figure 1.4.7.2 S. marinus (≥17 cm). Survey biomass indices for East and West Greenland, 1985–2004. Figure 1.4.7.3 CPUE of S.marinus in the Faeroes spring groundfish survey 1994–2005 and the summer groundfish survey 1996–2004 in ICES Division Vb. Figure 1.4.7.4 Results from the BORMICON model-BASE CASE, using catch data from ICES Division Va (about 2 000 t should be added to the projected catch to take account of the catches taken in Vb). Development of biomass and F, using different catch options (0–60 000 t indicated by labels) after 2004.  | | |
Reference Point ICES suggests that the relative state of the stock be assessed through survey CPUE index series (U).
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ICES considers that:
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ICES proposed that:
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Precautionary Approach reference points
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U
lim is 20% of highest observed survey index.
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U
pa be set at 60% of highest observed survey index.
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Technical basis
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The basis for the calculation of the U
pa is the Icelandic groundfish survey index series starting in 1985.
Since 1990 the average U has been around half of U
max. This has not resulted in any strong year classes compared to higher U's. A precautionary U
pa is therefore proposed at U
max*0.6, corresponding to the U's associated with the most recent strong year class. U is regarded as proxy for SSB but represents the fishable biomass.
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Projection Short term implicationsCatches of 37 000 t in 2006 (35 000 t in Va) are expected to keep the stock at an acceptable level in the short term (Figure 1.4.7.4). Scientific Advice Single stock exploitation boundariesExploitation boundaries in relation to precautionary limitsCatches in ICES Divisions Va in 2006 should be less than 35 000 t. Maintaining catches below 35 000 t is expected to keep the stock above Upa in the medium term. A small component in Division Vb should be accounted for and the total advised TAC for Divisions Va and Vb is therefore 37 000 t. There should be no directed fishery for S. marinus in Subarea XIV as the fishable stock of S. marinus in Subarea XIV is depleted and the adult stock is non-migrating. Management considerationsA large portion of the current catch comes from the relatively large 1985 and 1990 year classes. It is expected that these year classes will be a significant proportion of the catch in the medium term. All available data indicate that recent year classes are relatively poor. After the two strong year classes have passed the fishery, higher yield than about 20 000 t cannot be expected after 2010. The present management scheme in Va sets a joint TAC for S. marinus and S. mentella on the shelf. This impedes direct management of S. marinus. TAC or effort allocated to demersal redfish fishery should be given separately for each of the redfish stocks. Based on the low fishable biomass in Subarea XIV and its importance as a nursery area for the entire resource, ICES offers different advice for this area: the area should be closed to directed fishing for S. marinus. Management Considered a management unit: Yes Management Objectives There is no explicit management objective for this stock. Catch and TACS
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Year
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ICES
Advice
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Predicted catch
Corresp. to advice
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S. marinus
ACFM catch
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1987
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No increase in F
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83
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77
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1988
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No increase in F
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84
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90
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1989
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TAC1
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1171
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57
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1990
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TAC1
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1161
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67
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1991
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Precautionary TAC
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77(1171 )
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56
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1992
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Precautionary TAC
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76(1161)
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56
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1993
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Precautionary TAC1
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1201
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50
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1994
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Precautionary TAC, if required
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1001
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43
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1995
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TAC
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901
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45
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1996
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TAC for Va (28); precautionary TAC for Vb and XIV (4)
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322
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37
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1997
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Effort 75% of 1995 value
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322
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40
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1998
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Effort reduced in steps of 25% from the 1995 level
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37.22
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39
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1999
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Effort not increased compared to 1997
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352
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42
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2000
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Catch not increased compared to 1998
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352
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44
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2001
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Effort not increased compared to 1999
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332,3
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37
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2002
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25% reduction in effort
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294
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51
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2003
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25% reduction in effort(2001)
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314
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39
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2004
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25% reduction in effort(2002)
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37.44
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34
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2005
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Maintain fishable biomass above Upa
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374
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-
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2006
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Maintain fishable biomass above Upa
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374
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Weights in ‘000 t. 1 Deep-sea S. mentella and S. marinus combined. 2S. marinus only. 3 In Va only. 4Both Va and Vb and XIV. Biological State and Trend Exploitation rate: Moderate Fishing mortality
Abundance level: Virgin or High Abundance
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Fishable biomass in relation to precautionary limits
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Fishing mortality in relation to precautionary limits
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Fishing mortality in relation to highest yield
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Comment
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Full reproductive capacity
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Reference points not defined
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Unknown
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Based on the most recent indicator of SSB ICES classifiesthe stock as having full reproductive capacity. According to information from the Icelandic groundfish survey, the stock in Division Va has fluctuated between Upa and Ulim since 1990, but has been above Upa since 2002. In Subarea XIV the German groundfish survey showed an almost continuous decrease in biomass indices by more than 90% in the period 1986–2001, but signs of increasing biomass have been observed since 2001. In Division Vb catches have declined since 1985 to a low level in recent years, and this decline is also reflected in the Faroes summer survey (Figure 1.4.7.3). The strong 1990 year class has started to recruit to the Icelandic fishery and should sustain the stock in the short and medium term. The surveys do not indicate further strong year classes, and therefore the stock is expected to be reduced in the long term. Source of information “Report of the ICES Advisory Committee on Fishery Management, Advisory Committee on the Marine Environment and Advisory Committee on Ecosystems, 2005” ICES 2005 ICES  . Bibliography Report of the North-Western Working Group, 26 April–5 May 2005 (ICES CM 2005/ACFM:21). |
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