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Northern Prawn - Grand Bank
Marine Resource  Fact Sheet
Stocks management recommendations 2014
Northern Prawn - Grand Bank
Fact Sheet Citation  
Northern Shrimp in Div. 3LNO
Owned byNorthwest Atlantic Fisheries Organization (NAFO) – More
Related observationsLocate in inventorydisplay tree map
 
Species:
FAO Names: en - Northern prawn, fr - Crevette nordique, es - Camarón norteño, ru - Креветка северная
Geographic extent of Northern Prawn - Grand Bank
Main Descriptors
Considered a single stock: Yes        Spatial Scale: Regional
Management unit: Yes        Reference year: 2013
 
 
Biological State and Trend
State & Trend Descriptors
PartnerFIRMS
Exploitation rateModerate Fishing MortalityModerate fishing mortalityRed
Abundance levelSmall Stock SizeLow abundance

The stock has declined since 2007 and in 2013 the risk of being below Blim is greater than 95%. Given expectations of poor recruitment and relatively high fishing mortality, the stock is not expected to increase in the near future.
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
 

Northern Shrimp is caught in a directed bottom trawl fishery and there is little or no bycatch in other trawl fisheries. The Northern Shrimp fishery is regulated by quota.
  2007 2008 2009 2010 2011 2012 2013  
TAC as set by FC1 22 000 25 000 30 000 30 000 19 200 12 000 8 600  
STATLANT 21 22 535 26 004 27 236 19 745 13 014 9 966    
NIPAG2 23 570 26 649 27 527 20 536 13 316 10 108 6 020  

1 includes autonomous quotas

2 NIPAG catch estimates have been updated using various data sources (see p. 13, SCR. 14/48).

3.Provisional catches up to August 25.2014




Effects of the fishery on the ecosystem

No specific information available. General impacts of fishing gear on the ecosystem should be considered.
Assessment
 
Overall Assessment Results
Reference Point
 

Scientific Council considers that a female survey biomass index of 15% of its maximum observed level (19 330) provides a proxy for Blim (SCS Doc. 04/12).
Projection

Quantitative assessment of risk at various catch options is not possible for this stock at this time.
Assessment Model
Analytical assessment
Results

Based upon a qualitative evaluation of trends in stock biomass, fishing mortality proxy and recruitment. Input data are research survey indices and fishery data.

Next full assessment is planned for 2015.

Human impact

Mainly fishery related mortality has been documented. Other sources (e.g. pollution, shipping, oil-industry) are considered minor.

Biological and Environmental Interactions

Both stock development and the rate at which changes might take place can be affected by changes in predation, in particular by cod, which has been estimated to consume large amounts of shrimp. The size of the cod stocks in Div. 2J3KL and Div. 3NO have increased but remain at low levels and therefore the impact of cod predation is considered to be small. Some other groundfish which consume shrimps are known to have increased, but the impact on the shrimp stock has not been quantified.

Temperature in the stock area has been warming over the past decade. Effects of warmer temperatures on shrimp distribution, recruitment, growth and survival are unknown.

Fishing Mortality

Recruitment

Biomass
Scientific Advice

Special comments

Genetic analysis has been completed. Shrimp in Div. 3LNO are genetically distinct from those in Div. 3M and the Gulf of Maine, but not from those further north. Additional work is ongoing to investigate the contribution of stocks north of Div. 3L to the production of Div. 3LNO shrimp.
Management
Management unit: Yes

Management Advice

Recommendation for 2015

No directed fishery as there is a very high probability that the stock is below Blim.
Management Objectives

No explicit management plan or objectives defined by Fisheries Commission. General convention objectives (GC Doc. 08/3) are applied. Advice is based on qualitative evaluation of biomass indices in relation to historic levels, and provided in the context of the precautionary approach framework (FC Doc. 04/18).

Stock definition for management purposes

The stock in Div. 3LNO is assessed and managed as a discrete population (see special comment).
Source of information
 
http://www.dfo-mpo.gc.ca/Library/352955.pdf Click to openhttp://www.dfo-mpo.gc.ca/Library/352955.pdf
Report of the Meeting, 10-17 September, 2014 - SCS Doc. 14/19 Click to openhttp://www.nafo.int/publications/frames/sci-reports.html
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