Maturity patterns in flatfish

In recent years there seems to be a shift in maturity of sole (market samples). In 2018 during the BTS spawning plaice (August) was caught and the plaice was exceptionally skinny while the length-weight relationship at first sight did not seem to differ from previous years. This leads to the assumption that maturation cycles in sole and/or plaice are changing. On top of that, part of the sole stock in the North Sea is indeterminate spawner, and part is determinate.