Fisheries and Resources Monitoring System

EspañolFrançais
Redfish - North and Southeastern Grand Bank
Marine Resource  Fact Sheet
Stocks management recommendations 2014
Redfish - North and Southeastern Grand Bank
Fact Sheet Citation  
Redfish in Div. 3LN
Owned byNorthwest Atlantic Fisheries Organization (NAFO) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - Atlantic redfishes nei, fr - Sébastes de l'Atlantique nca, es - Gallinetas del Atlántico nep, ru - Окуни морские
Geographic extent of Redfish - North and Southeastern Grand Bank
Main Descriptors
Considered a single stock: No        Spatial Scale: Regional
Management unit: Yes        Reference year: 2013
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateNone-Low Fishing MortalityNo or low fishing mortalityGreen
Abundance levelIntermediate Stock SizeIntermediate abundance

The stock is estimated to be at 1.4 x Bmsy. There is a low risk of the stock being below Bmsy. Fishing mortality is below Fmsy (0.22 Fmsy), and the probability of being above Fmsy is very low. Recent recruitment (2005 – 2013) appears to be above average.
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: No
Exploitation
 

Catches declined to low levels in the early 1990s and have since varied between 450 – 3 000 t. From 1998-2009 a moratorium was in place. Catches increased with the reopening of the fishery in 2010 and have reached 6 000 t in 2013, the highest level recorded in 20 years.

Recent catch estimates of all redfish and TACs are:
  2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
TAC ndf ndf ndf ndf ndf 3.5 6 6 6.5 7
STATLANT 21 0.4 0.2 0.2 0.4 0.3 3.1 5.4 4.3 6.0  
STACFIS 0.7 0.5 1.7 0.6 1.1 4.1 5.4 4.3 6.0  
ndf – no directed fishing



Effects of the fishery on the ecosystem

Fishing intensity on redfish has impacts on Div. 3NO cod, Div. 3LNO American plaice and SA 2 + Div. 3KLMNO Greenland Halibut through by-catch.
Assessment
 
Overall Assessment Results
Reference Point
 

Blim:30% Bmsy

Flim:Fmsy



Reference points were derived during the 2004 Scientific Council meeting.
Projection
    Fstatus quo 1/3 Fmsy 2/3 Fmsy
  Percentile 10 50 90 10 50 90 10 50 90
B/Bmsy 2014 0.931 1.371 1.632 0.931 1.371 1.632 0.931 1.371 1.632
  2015 0.997 1.429 1.665 0.997 1.429 1.665 0.997 1.429 1.665
  2016 1.062 1.481 1.695 1.045 1.464 1.676 0.966 1.415 1.625
  2017 1.120 1.528 1.720 1.088 1.494 1.685 0.997 1.403 1.594
F/Fmsy 2014 0.188 0.221 0.321 0.188 0.221 0.321 0.188 0.221 0.321
  2015 0.177 0.214 0.318 0.277 0.333 0.496 0.553 0.667 0.991
  2016 0.177 0.214 0.318 0.277 0.333 0.496 0.553 0.667 0.991
Yield 2014 6 500 6500 6500 6500 6500 6500 6500 6500 6500
  2015 6254 6529 6361 9708 10130 10650 19100 19900 20790
  2016 6353 6752 6901 9762 10360 11100 18700 19720 20770
Assessment Model
Analytical assessment
Results

A surplus production model was used; model settings have been changed with an MSY constraint at the average level of 21 000 t for the 1960-1985 period; the results were consistent with the previous assessments. Input data comes from research surveys and the fishery. The next assessment is scheduled for 2016.

Fishing Mortality

Recruitment Proxy

Biomass

Human impact

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

Biological and environmental interactions

Redfish are long living slow growing species with low recruitment over relatively long periods of time. Furthermore redfish are important prey species in the ecosystem and can be subjected to unexpected and important increases on natural mortality.
Scientific Advice

Special Comments

The modeling framework previously used was not able to provide reliable results when allowed to run without constraints on MSY. Therefore MSY was fixed in the model and the results are conditioned on this assumption. Management decisions based on this assessment should take into account this added uncertainty.



Scientific Council notes that a variety of HCRs have been tested for this stock (see SCS Doc. 14/17Rev., section VII.1.c.vii) through a management strategy evaluation.
Management
Management unit: Yes

Management Advice

Recommendation for 2015 and 2016

Fishing mortality up to 1/3 Fmsy corresponding to a catch of 10 200 t in 2015 and 2016 has low risk (<10%) of exceeding Flim, and is projected to maintain the stock at or above Bmsy. Fishing mortality up to 2/3 Fmsy also has low risk of exceeding Flim, and maintaining the stock at or above Bmsy. However given the uncertainties in the assessment, a higher TAC should be reached by a stepwise increase from the current catch level.
Management Objectives

No explicit management plan or management objectives defined by Fisheries Commission. General Convention objectives (GC Doc. 08/3) are applied.

Stock definition for management purposes

There are two species of redfish, Sebastes mentella and Sebastes fasciatus, which occur in Div. 3LN and are managed together as one management unit.
Source of information
 
SCR Doc. 14/006, 14/022; SCS Doc. 14/10, 14/13 Click to openhttp://www.nafo.int/publications/frames/sci-docs.html
Report of the Meeting, 30 May - 12 June, 2014 - SCS Doc. 14/17Rev Click to openhttp://www.nafo.int/publications/frames/sci-reports.html
powered by FIGIS  © FAO, 2019
Powered by FIGIS
crawl