Dry weight of Aristotle's lantern (g)/Dry weight of test with spines and peristomial membrane (g) x 100 (8)
Because feed rations in this study were below satiation, any variations in the relationship of the size of the test with spines to the size of the Aristotle's lantern can be attributed directly to variations in nutrition quality instead of nutrient quantity.
Final wet weight gain and dry matter production of the Aristotle's lantern did not vary among treatments, indicating little or no variation in the growth rate of the lantern in response to large differences in dietary protein and carbohydrate content during the 9-wk study period.
Relative size of the Aristotle's lantern in Echinometra mathaei occurring at different densities.
Scaling of the pieces of the Aristotle's lantern in five species of Strongylocentrotus (Echinodermata:Echinoidea).