ICES blue whiting advice 2021

The ICES has released its advice on blue whiting stocks for 2021 in the North East Atlantic

The ICES has released its advice for blue whiting stocks in the North East Atlantic and Arctic Ocean for 2021.

ICES advises that when the long-term management strategy agreed by the European Union, the Faroe Islands, Iceland, and Norway is applied, catches in 2021 should be no more than 929 292 tonnes, a decrease of 20% from 2020.

Fishing mortality (F) is estimated to be above FMSY since 2014. Spawning-stock biomass (SSB) has been decreasing since 2018; however, it is estimated to remain above MSY Btrigger. Recruitment (R) from 2017 to 2020 is estimated to be low, following a three-year period of high recruitment.

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The assessment uses data from one survey only, the International Blue Whiting Spawning Stock Survey (IBWSS), which was cancelled in 2020 due to the COVID-19 disruption. The lack of IBWSS 2020 data increases the uncertainties of the assessment results in the terminal year, especially for the youngest cohorts. Because the model estimate of recruitment in 2020 is only based on the catch numbers of age 1 in 2020, it is more uncertain than in previous years. However, additional surveys not included in the assessment model indicate that recruitments have been of a low magnitude since 2017, which is in line with the assessment results. The magnitude of the 2020 recruitment estimate has a minor effect on catch opportunities for 2021, as mature fish constitute the main part of the catches.

The assessment uses data from one survey only, the International Blue Whiting Spawning Stock Survey (IBWSS), which was cancelled in 2020 due to the COVID-19 disruption. The lack of IBWSS 2020 data increases the uncertainties of the assessment results in the terminal year, especially for the youngest cohorts. Because the model estimate of recruitment in 2020 is only based on the catch numbers of age 1 in 2020, it is more uncertain than in previous years. However, additional surveys not included in the assessment model indicate that recruitments have been of a low magnitude since 2017, which is in line with the assessment results. The magnitude of the 2020 recruitment estimate has a minor effect on catch opportunities for 2021, as mature fish constitute the main part of the catches.

Read the full report here.

Source

Brian J McMullin Solicitors
MMG Welding Killybegs

ICES Releases 2021 Blue Whiting Advice for North East Atlantic

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