Fig 7 -

• Main Authors: Côme Denechaud (10515552), Audrey J. Geffen (3243306), Szymon Smoliński (10515549), Jane A. Godiksen (10515558)
• Format: Still Image
• Language: unknown
• Published: 2021
• Subjects: Evolutionary Biology; Ecology; Developmental Biology; Inorganic Chemistry; Environmental Sciences not elsewhere classified; Biological Sciences not elsewhere classified; routinely recorded outside; recent experimental studies; physiological processes behind; large archival collection; investigate temporal changes; different life history; represent spawning events; spawning zones likely; spawning zones could; spawning zones appear; first spawning events; accurately record maturity; otolith spawning zones; northeast arctic cod; spawning ?</ p; gonad maturity stages; otolith &# 8220; spawning zones; &# 8220; otolith macrostructure; gonad examinations; first examined; sexual maturity; year lag; universal trait; study shows; results illustrate; previously proposed; migratory behaviors; general characteristic; environmental traits; energy partitioning; certain environments; atlantic cod; age derived; Arctic; Barents Sea; Lofoten; Arctic cod; Northeast Arctic cod
• Online Access: https://doi.org/10.1371/journal.pone.0257218.g007

Proportions of mature-at-age per year and age class from the official stock assessment ogives (black) and reconstructed for each year from individual increments identified as spawning zones (blue). Vertical dotted line (1959) represents the beginning of the period combining Norwegian spawning zone data and Russian gonad readings for calculating maturity at age in stock assessment; vertical dashed line (1982) represents the beginning of yearly Barents Sea and Lofoten bottom trawl surveys and the change to using only gonad maturity stages in stock assessment.