Fig. 5. The initial rate of post-tail flip arginine phosphate (AP) recovery for the small (broken lines) and large (unbroken lines) size classes. Linear regressions for small and large P. pugio resulted in r² values of 0.36 and 0.43 and regression equations of y=0.92x+2.61 and y=0.81x+2.40, respectively. Small and large Penaeus spp. had r² values of 0.60 and 0.23 and regression equations of y=0.78x+1.97 and y=0.68x+3.08, respectively. Small and large P. argus yielded r² values of 0.68 and 0.42 and regression equations of y=0.34x–1.72 and y=0.38x+0, respectively. All regression slopes were significantly different from zero (P<0.05), but recovery rates between the small and large size classes were not significantly different within any species (see text).