Figure 3.

Feeding rates of Pagurus hirsutiusculus on Isthmia nervosa at different initial biomasses (wet weight). Error bars represent SEs, which were generated from 200 bootstrap samples of the differences in weight change between 19 controls and each hermit crab trial. Based on analysis of covariance, daily feeding rate is higher for large than for medium and small hermit crabs (F = 6.95, P = 0.005), but initial diatom biomass has no effect on feeding rate (F = 2.20, P = 0.15). Open circles, large hermit crabs; x, medium; dark points, small.