Fig. 1.

Effect of manipulating adult density for 1 month in the field on egg traits of S. plicata (high adult density shown in dark bars; low adult density shown in white bars). Dashed horizontal line shows mean egg traits of unmanipulated “wild” specimens collected from the same site. Bars show the mean (± SE) area of the “total egg area” (which includes both the ovicell and follicle cell area and therefore reflects the target size of the egg) (a), the “ovicell area” (the principle energetic investment in the egg) (b), and the “follicle cell area” (the accessory structures of the egg) (c).