The Influence of Previous Feeding Conditions on Consumption Rates and Food Selectivity in the Rotifer Brachionus calyciflorus
White, Mark Arlington
MetadataShow full item record
Feeding rates in the rotifer Brachionus calyciflorus were measured using radioactively labeled (32p and 33p) algal and yeast cells. It was found that animals feeding on the yeast (Rhodotorula glutinus) immediately previous to the testing period consumed greater quantities of cells during the testing period then animals previously feeding on the alga (Euglena gracilis). These findings were correlated with a previously reported behavioral mechanism of feeding regulation. The results from exposures to a mixed (1:1) suspension of these foods were inconclusive with respect to the effects of previous feeding conditions on feeding rates. The preferential ingestion of Euglena cells by Brachionus calyciflorus was noted, however. Several explanations for this selective behavior were suggested.