Why is growth of fish so variable - both throughout their life-span and between cohorts born in different years (shown by different colours of grey in the figure below)? Check out some of the suggested mechanisms regulating sprat growth in a recent paper by Lindegren et al. (2020) in ICES Journal of Marine Science: https://doi.org/10.1093/icesjms/fsaa218
Header image courtesy of Fredrik Ryderheim.