Fisheries and Resources Monitoring System

EspañolFrançais
American Plaice - Grand Bank
Marine Resource  Fact Sheet
Stocks management recommendations 2016
American Plaice - Grand Bank
Fact Sheet Citation  
American plaice in Div. 3LNO
Owned byNorthwest Atlantic Fisheries Organization (NAFO) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - Amer. plaice(=Long rough dab), fr - Balai(=Plie canadienne), es - Platija americana, ar - هوشع كندي, zh - 拟庸鲽, ru - Камбала-ерш
Geographic extent of American Plaice - Grand Bank
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Regional
Management unit: Yes        Reference year: 2015
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateNone-Low Fishing MortalityNo or low fishing mortalityRed
Abundance levelDepleted Stock SizeDepleted

The stock remains low compared to historic levels and, although SSB is increasing, it is still estimated to be below Blim. Recruitment has been low since the late 1980s, but has shown an increasing trend from 2007-2013. This has been followed by lower recruitments in 2014 and 2015.


Habitat and Biology
Climatic zone: Temperate.   Bottom type: Unspecified.   Depth zone: Slope - Deepslope (500 m - 1000 m).   Horizontal distribution: Neritic.   Vertical distribution: Demersal/Benthic.  

Geographical Distribution
Jurisdictional distribution: Straddling between High Seas and EEZ

Water Area Overview
Spatial Scale: Regional

Geo References
Resource Structure
Considered a single stock: Yes
Exploitation
 

The stock has been under moratorium since 1995. American plaice in recent years is caught as bycatch mainly in otter trawl fisheries of yellowtail flounder, skate, Greenland halibut and redfish. To estimate catch for 2011-2014, for Div. 3N, information on effort from NAFO observers and logbook data was used where possible with the assumption that CPUE has not changed substantially from 2010. In 2015, STATLANT 21A data was used for Canadian fisheries and Daily Catch Records (DCR) for fisheries in the NRA.

Recent catch estimates and TACs are:
  2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
TAC ndf ndf ndf ndf ndf ndf ndf ndf ndf ndf
STATLANT 21 1.5 1.9 1.8 1.5 1.2 1.3 2.2 1.4 1.1  
STACFIS 3.6 2.5 3.0 2.9 2.41 2.11 3.01 2.31 1.12  

ndf No directed fishing.

1 Catch was estimated using fishing effort ratio applied to 2010 STACFIS catch.

2 Catch was estimated using STATLANT 21 data for Canadian fisheries and Daily Catch Records for fisheries in the NRA.



Effects of the fishery on the ecosystem

Not applicable, no directed fishery.
Assessment
 
Overall Assessment Results
Reference Point
 

Blim: 50 000 t of spawning biomass (Scientific Council Report, 2003)

Bmsy: 242 000 t of spawning biomass (Scientific Council Report 2011)

Flim: 0.31 (Scientific Council Report, 2011)
Projection
  F = 0
  SSB (‘000 t)
  p10 p50 p90
2016 27 30 33
2017 32 35 39
2018 35 38 43
2019 37 41 46


  F2013-15 = 0.08
  SSB (‘000 t)   Yield (‘000 t)
  p10 p50 p90   p10 p50 p90
2016 27 30 33   2.5 2.7 3.0
2017 29 32 36   2.6 2.8 3.1
2018 30 33 37   2.6 2.9 3.2
2019 30 33 37        


  Yield P(SSB>Blim) p(SSB2019 > SSB2016)
Fishing Mortality 2017 2018 2019 2017 2018 2019  
F = 0 - - - <5% <5% <5% >95%
F2013-2015 = 0.08 2744 2835 2906 <5% <5% <5% >95%
Assessment Model
Analytical assessment
Results

An analytical assessment using the ADAPTive framework tuned to the Canadian spring, Canadian autumn and the EU-Spain Div. 3NO survey was used. A virtual population analysis (VPA) was conducted based on the 2014 assessment formulation, with updated data.

The next full assessment is planned for 2018.

Fishing Mortality

Recruitment

Biomass

Human impact

Mainly fishery related mortality. Other sources (e.g. pollution, shipping, oil-industry) are undocumented.

Biological and environmental interactions

Capelin and sandlance as well as other fish and invertebrates are important prey items for American plaice. There has been a decrease in age at 50% maturity over time, possibly brought about by some interaction between fishing pressure and environmental/ecosystem changes during that period.
Scientific Advice

Special Comments
Management
Management unit: Yes

Management Advice

Recommendation for 2017 and 2018
Management Objectives

In 2011 FC adopted an “Interim 3LNO American Plaice Conservation Plan and Rebuilding Strategy” (FC Doc. 11/21). There is a Harvest Control Rule (HCR) in place for this stock.

Stock definition for management purposes

American plaice in Div. 3LNO is considered a separate stock.
Source of information
 
Report of the Meeting, 03 - 16 June, 2016 - SCS Doc. 16/14Rev.
FC Doc. 11/21.
powered by FIGIS  © FAO, 2019
Powered by FIGIS
crawl