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Lytechinus variegatus were collected from 25 C waters, maintained in the laboratory for 4 wk at either 16 or 23 C, and fed an artificial food. Feeding rates of individuals maintained at 16 C were low initially but subsequently increased to rates near those of individuals maintained at 23 C. Passage times of food through the gut decreased after 4 wk at 16 C but remained longer than those observed at 23 C. Activities of digestive carbohydrases were similar and low in both groups when measured at 16 C and showed a Q10 of ca. 2 in the range of 16-25 C. Absorption efficiencies and amounts of organic material absorbed from food were consistently lower for individuals maintained at 16 C than for those at 23 C. Although feeding rates compensate, L. variegatus is less efficient at processing food at 16 C than at 23 C.

Citation / Publisher Attribution

T. S. Klinger, H. L. Hsieh, R. A. Pangallo, C. P. Chen, and John M. Lawrence. 1986. "The Effect of Temperature on Feeding, Digestion, and Absorption of Lytechinus Variegatus (Lamarck) (Echinodermata, Echinoidea)." Physiological Zoology. 59(3): 332-336.

© 1986 by The University of Chicago.