Female reproductive stages among length frequencies.

a) 10–28 mm body length classes of stages F0, FI, FII and FIV from 2002, 2007, 2011, 2012 and 2013 combined with a vertical red line marking the greater than 16 mm size ranges included in; b) the percentages of reproductive stages F0, FI, FII and FIV among 16 mm and greater length females.