We have a new, open-access article exploring spawning migration timing in Atlantic herring out in the September issue of the Journal of Fish Biology.
In the paper, we identify earlier spawning time but longer duration for Atlantic cod in the southwest Baltic Sea in warmer years. Earlier timing was linked to temperatures during gonadal development (particularly the latest, vitellogenesis stage), with a thermal constant of spawning identified as 316˚C days.
The study was led by Nicolas C. Ory and Catriona Clemesen at GEOMAR and was based on a 50 year time-series of herring observations in Kiel Fjord graciously provided by fisher Anton Kardel.