Exploration of historical data and potential solution for the missing information in the Iberian sardine DEPM survey (SAREVA 0320) caused by the COVID-19 pandemic crisis.

This working document provides a description of methods explored to compensate the lack of data in ICES areas 9aN and 8c caused by the cancelation of sardine DEPM survey “SAREVA 0320”. After checking that sardine egg data obtained from the anchovy DEPM survey, delivered in a partial area of division...

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Bibliographic Details
Main Authors: Díaz-Conde, María Paz, Domínguez-Petit, Rosario, Carrera, Pablo, Angélico, María Manuel, Nunes, Cristina
Format: Report
Language:English
Published: 2021
Subjects:
Pesquerías
DEPM
Centro Oceanográfico de Vigo
Sardine
fish
surveys
exploration
Nordeste
Northeast Atlantic
Online Access:http://hdl.handle.net/10508/11634
http://hdl.handle.net/10261/328796
Description
Summary:This working document provides a description of methods explored to compensate the lack of data in ICES areas 9aN and 8c caused by the cancelation of sardine DEPM survey “SAREVA 0320”. After checking that sardine egg data obtained from the anchovy DEPM survey, delivered in a partial area of division 8c during May by AZTI Tecnalia (BIOMAN), were not adequate for extrapolating to the SAREVA surveyed area, alternative analysis were presented based on i) sardine eggs historic data from the CUFES sampler used in the acoustic Spanish surveys PELACUS and ii) spawning stock biomass data from the Portuguese survey PT-DEPM-PIL and the Spanish survey SAREVA. A methodological approach similar to those adopted in the last sardine assessment (ICES, 2020) to face the problem of the acoustic lack of data in 2020 in subdivisions 9aN and division 8c, is described, reasoned and suggested as a solution to face the lack of Spanish data for sardine stock assessment in 2020.

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