English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

10 pages, 4 figures, 2 tables.Population studies of fish depend upon correct age estimates. However ageing from otoliths is often a subjective\udactivity, based on experience. To produce more objective and reproducible results, image analysis systems for semiautomatic\udotolith reading are being developed. We propose determinig the daily growth and annual structures in each otolith\udby means of Fourier analysis of the luminous signal, after filtering the high frequencies by means of a moving threshold. A\udnew approach using spatio-frequential wavelet analysis is discussed for otolith age determination. The different readings of\udeach otolith are standardised and weighted to obtain a combined age determination and vector of increment widths.This paper is a result of the project “PETRI.93-\ud034” sponsored by the Spanish CICYT.Peer reviewe

Approaches to otolith age determination: image signal treatment and age attribution