Skip to main content
European Climate, Infrastructure and Environment Executive Agency
General publications

Validating age-determination of anglerfish and hake



ISBN: 978-92-9460-203-9, doi: 10.2826/748632
Publication date
15 January 2020
Executive Agency for Small and Medium-sized Enterprises


Reliable measures of fish length-at-age are needed to estimate the biological reference points used in fish stock assessment.

These data are usually obtained by counting and measuring seasonal growth marks in otoliths or other calcified structures for a representative sample of the population.

For anglerfish (Lophius spp.) and hake (Merluccius merluccius) in the Northeast Atlantic, traditional age-estimation methods are unreliable. The assessments for these stocks are based on survey indices or are length-based and require accurate information on length-at-age. Without this information, accurate assessments and the estimation of MSY reference points are problematic.

Validating age-determination of anglerfish and hake_1


15 JANUARY 2020
Validating age-determination of anglerfish and hake