Ref ID : 968
Leo S. Luckinbill; The effects of space and enrichment on a predator-prey system. Ecology 55:1142-1147, 1974
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The prolonged coexistence of the predator Didinium nasutum and its prey Paramecium aurelia was obtained in these experiments. In a large experimental volume, predators reduced the prey population to a low density but were unable to capture them all. In small experimental volumes, all the P. aurelia were captured. In large-volume experimental systems enriched with abundant bacterial food, Didinium also captured all the prey. Thus, a large arena and the limitation of the prey population by its food supply are necessary for stable interaction and assure the survival of both predator and prey. Damped population oscillations of predator and prey occurred in the absence of refuges for prey or of physical heterogeneity.