Fig. 2.

Strongylocentrotus droebachiensis.a Gonad equivalent length (cm) and b gonad index (%) both as a function of final nominal diameter (mm), c gonadal AFDW equivalent length (cm) as a function of total AFDW equivalent length (cm) and d gonadal AFDW index (%) as a function of total AFDW (g) for urchins grown for 22 weeks in the presence (black circles, solid lines) or absence (open circles, dashed lines) of waterborne cues from the crab Cancer borealis. Lines in a, b, c and d indicate the fit of Eqs. 6, 8, 7 and 9, respectively, to each treatment. All lines are significantly different between treatments. See Table 2 for statistics