Fig. 7. Model 5 (y = β1ix + β2i I(x-xc)(x-xc) fitted to 2003 bluefish growth data. A change point is inserted at 6 weeks for estuarine recruitment. The spring cohort is represented by the dashed line, the summer cohort by the dotted line and the autumn cohort by the solid line. This model was fit to data shown in figure 6.