Figure 6.

Duration from embryonic development to hatching as a function of temperature for several species of echinoids from different latitudes. Time to hatching is plotted against mean experimental or environmental temperature for that species (adapted from Bosch et al. 1987; Stanwell-Smith & Peck 1998). Data for tropical and temperate species (filled triangles), Sterechinus neumayeri from McMurdo Sound (open triangles; Bosch et al. 1987) and S. neumayeri from Signy Island (open circles; Stanwell-Smith & Peck 1998).