Workshop on Age Reading of European Sardine (Sardina Pilchardus) (NE Atlantic and Mediterranean) (WKARAS2) ...

• Main Author: ICES
• Format: Report
• Language: unknown
• Published: ICES Scientific Reports 2023
• Subjects: Oceanic Northeast Atlantic ICES Ecoregion; Northeast Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.18618206.v1; https://ices-library.figshare.com/articles/report/Workshop_on_Age_Reading_of_European_Sardine_Sardina_Pilchardus_NE_Atlantic_and_Mediterranean_WKARAS2_/18618206/1

The Workshop on Age reading of European Sardine (Sardinapilchardus) (NE Atlantic and Medi-terranean) [WKARAS 2] met to review the information on age determination, discuss the results of the 2017 otolith exchange, review the existing validation methods, clarify the interpretation of annual rings, and update the age reading protocol and a reference collection of well-defined oto-liths.The 2017 otolith exchange included images of otoliths’ pairs collected from fish samples taken in 11 locations. Growth and reproduction were individually analysed by the participants for age attribution following a reference age reading protocol. R scripts based on Eltink’s MS Excel spreadsheet (Eltink, 2000) following the recommendations of the “Guidelines and tools for age reading comparisons” (Eltink et al., 2000) were used for age readings comparative analyses.In order to clarify the causes of age reading discrepancies between readers, discussions based on joint analyses of projected images of selected otoliths among those ...