OFFSHORE SHRIMP Pandalus borealis

Advice 2024/2025

4 537

tonnes

Advice 2023/2024

5 022

tonnes

Advice change

-10 %

Publication of Advice: 17 August 2024. Published by Marine and Freshwater Research Institute.


Advice

MFRI advises in accordance with the MSY approach that catches in the fishing years 2024/2025 and 2025/2026 should be no more than 4 537 tonnes in each fishing year.

Stock development

Fishable biomass index is above Ilim and the fishing pressure is below Fproxy.

0 15 30 45 60 1980 1985 1990 1995 2000 2005 2010 2015 2020 Thous. tonnes Catches I t r i g g e r I l i m 0 25 50 75 100 1991 1996 2001 2006 2011 2016 2021 Thous. tonnes Biomass index t a r g e t F p r o x y 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1990 1995 2000 2005 2010 2015 2020 Fishing pressure proxy

Northern shrimp offshore. Catches, Fproxy and fishable biomass indices with Itrigger and Ilim.

Basis of the Assessment and reference points*

The ICES framework for short lived stocks for which analytical assessment is not possible but trends in biomass indicators are assumed to reflect changes in stock dynamics was applied (Category 3 stock, ICES, 2022). Survey biomass index of offshore northern shrimp, along with catch, is used to calculate Fproxy (catch/survey biomass). The advice is based on multiplying the most recent index value with the target Fproxy value.

Northern shrimp offshore Advice calculation

Prospects

The juvenile index has been low since 2004 and at historically low levels since 2015. The number of young males increased in 2024 and the juvenile index was the highest since 2015. The biomass index has been relatively stable since 2012 but has decreased since 2018. The shrimp surveys therefore suggest that the stock will remain at low levels in coming years.

Other information

Next survey will be in 2026.

The abundance index of cod in the offshore shrimp survey has been high since 2014, with highest values observed in 2016–2018, but was lower in 2020 and 2022. In 2024 the highest cod index since 1988 was observed. Abundance of cod has also been high in the spring groundfish survey (IS-SMB) and the autumn groundfish survey (IS-SMH). Therefore, it is assumed that predation of shrimp by cod has increased in recent years.

Advice, Tac and catch

Northern shrimp offshore. Recommended TAC, national TAC, and catches (tonnes).

References and further reading

ICES. 2022. ICES technical guidance for harvest control rules and stock assessments for stocks in categories 2 and 3. In Report of ICES Advisory Committee, 2022. ICES Advice 2022, Section 16.4.11. (https://doi.org/10.17895/ices.advice.19801564).

MFRI Assessment Reports 2022. Offshore northern shrimp. Marine and Freshwater Research Institute, 24 August 2022.