Biological Oceanography

Fig. 17.10 Spawner–recruit relationship for Bering Sea flathead sole
(Hippoglossoides elassodon) to which a Ricker curve (R = aS exp[−bS], a and b
constants) fits reasonably well. The curve was fitted to data for 1978–1988, and then
predicted the data for 1989–1996. While there were no points with very low
recruitment, R for S = 0 is certain to be zero, anchoring the curve.
(From Wilderbuer et al. 2002.)