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| Fact Sheet Title Fact Sheet |
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| Witch flounder - Northeast Newfoundland Shelf and Northern Grand Bank |
 | Witch flounder in Div. 2J3KL |
| | Data Ownership | | This document provided, maintained and owned by Northwest Atlantic Fisheries Organization (NAFO) , is part of NAFO Summary Sheets data collection. |
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| ident Block | ident Block | | | | Species List: | | Species Ref: en - Witch flounder, fr - Plie cynoglosse, es - Mendo, ru - Камбала длинная (красная) атлантическая |
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| ident Block Witch flounder - Northeast Newfoundland Shelf and Northern Grand Bank Aq Res Ident Aq Res Ident Aq Res Ident | fao Div |
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| 21.2.J | Atlantic, Northwest / 21.2.J |
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| 21.3.K | Atlantic, Northwest / 21.3.K |
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| 21.3.L | Atlantic, Northwest / 21.3.L |
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| Aq Res | Biological Stock: Biological Stock
Value: Regional
Management Unit: Management Unit
Reference Year: 2012
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| 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. |
| | | | | | Aq Res State Trend The stock remains below Blim. Recruitment in 2011 and 2012 was below average and fishing mortality is currently low. Habitat Bio Climatic Zone: Temperate. Bottom Type: Unspecified. Depth Zone: Slope-Deepslope 500-1000m. Horizontal Dist: Neritic. Vertical Dist: Demersal/Benthic. Geo Dist Geo Dist: Straddling between High Seas and EEZ Water Area Overview Spatial Scale: Spatial Scale Water Area Overview  | | Water Area Overview Witch flounder - Northeast Newfoundland Shelf and Northern Grand Bank
| fao Div | 21.2.J: Atlantic, Northwest / 21.2.J | | 21.3.K: Atlantic, Northwest / 21.3.K | | 21.3.L: Atlantic, Northwest / 21.3.L |
| | | | | | Water Area Overview |
Water Area OverviewWitch flounder - Northeast Newfoundland Shelf and Northern Grand Bank Aq Res Struct Biological Stock: Biological Stock Exploit A moratorium was implemented in 1995 following drastic declines in catch from the mid-70s, and catches since then have been low levels of bycatch in other fisheries (e.g. Greenland halibut and redfish fisheries). Recent catch estimates and TACs are:
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2004 |
2005 |
2006 |
2007 |
2008 |
2009 |
2010 |
2011 |
2012 |
2013 |
| TAC |
ndf |
ndf |
ndf |
ndf |
ndf |
ndf |
ndf |
ndf |
ndf |
ndf |
| STATLANT 21 |
0.3 |
0.2 |
0.1 |
0.1 |
0.1 |
0.1 |
0.2 |
0.2 |
0.2 |
|
| STACFIS |
0.8 |
0.2 |
0.1 |
0.1 |
0.1 |
0.1 |
0.2 |
0.2 |
0.2 |
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ndfno directed fishing.
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Effects of the fishery on the ecosystemThere is no directed fishery. Bio Assess Results Ref Point Blim is 15% of the highest observed survey biomass, adjusted to the entire stock distribution (B1984*1.48) (STACFIS 2010 p 193). Projection Quantitative assessment of risk at various catch options is not possible at this time. Assess Models Analytical assessment Results Qualitative evaluation of trends in survey biomass indices relative to exploitation and recruitment information were used to assess the status of the stock. Next assessment is planned for 2016. Human impactMainly bycatch related fishery mortality has been documented. Other sources (e.g. pollution, shipping, oil-industry) are undocumented. Biological and environmental interactionsIn the late 1970s and early 1980s witch flounder were widely distributed throughout the Div. 2J3KL shelf area in deeper channels around the fishing banks, and were more abundant in Div. 3K. By the mid-1980s they were rapidly disappearing and by the early 1990s had virtually disappeared from the area entirely except for some very small catches along the slope and more to the southern area. Since 1998, witch flounder have been found mostly along the deep continental slope area, in depths of 200-750m. Fishing MortalityRecruitmentBiomass Sci Advice Special commentsNone Management Management: Management Div. 3L only Advice Recommendation for 2014-2016No directed fishery to allow for stock rebuilding. By-catches of witch flounder in other fisheries should be kept at the lowest possible level. Objectives No explicit management plan or management objectives are defined by Fisheries Commission. General convention objectives (GC Doc. 08/3) are applied. Advice is based on survey indices, catch trends and estimates of recruitment. The stock is widely distributed throughout the shelf area of Div. 2J3KL in deeper channels around the fishing banks, primarily in Div. 3K. Sources Report of the Meeting, 7-20 June, 2013 - SCS Doc. 13/17  http://www.nafo.int/publications/frames/sci-reports.html |
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