|Contributor(s)||Mahe Kelig, Bled--Defruit Geoffrey, Chantre Celina|
|Source||ICES Scientific Reports/Rapports scientifiques du CIEM (2618-1371) (ICES), 2020 , Vol. 2 , N. 15 , P. 76p.|
The Workshop on age validation studies of small pelagic species (WKVALPEL) fo-cused on validating ageing criteria for small pelagic species (anchovy, horse macke-rel, chub mackerel, mackerel and sardine). The aim of the workshop was to collate information on existing ageing protocols and to use these to support development of a validated protocol to better standardize age estimates. One of the main sources of error affecting ageing precision is the discrimination bet-ween the false ring and annulus. An ageing process follows a number of typical steps. First, an ageing methodology is established, based on scientific information, to obtain age data for a particular species. Once age results are available, some analysis is re-commended to improve precision among different readers and/or readings. The next step is to perform other studies that offer independent results used to support, or not, an accepted ageing methodology. Several matching and independent results help to corroborate certain ageing criteria. Each study determines how precision and/or trueness are enhanced. In general, these methods are included in indirect or semi-direct validation categories, as true ages are not actually known in any of them. Some other methodologies, usually more complex and costly, are considered strictly as va-lidation experiments, as results approach to real ages. Tagging-recapture experiments and rearing in captivity are included within this category.
ICES (2020). Workshop on age validation studies of small pelagic species (WKVALPEL). ICES Scientific Reports/Rapports scientifiques du CIEM, 2(15), 76p. Publisher's official version : https://doi.org/10.17895/ices.pub.5966 , Open Access version : https://archimer.ifremer.fr/doc/00653/76520/