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American Zoologist 1979 19(4):1097-1104; doi:10.1093/icb/19.4.1097
© 1979 by The Society for Integrative and Comparative Biology
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Asymmetric Competition Among Distant Taxa

RICHARD LEVINS
Harvard School of Public Health Boston, Massachusetts 02115

For purposes of theoretical analysis, competition between distantly related taxa is interpreted as asymmetric competition. Several kinds of situations are examined: A predator competes with one of its prey species for a second resource; competitors utilize successive stages in the life cycles of prey; one predator facilitates the resource utilization of its competitor; competitors differ in their vulnerability to predation. Methods of signed digraphs (loop analysis) and statistics over time are used to predict the qualitative consequences of the different interaction patterns.


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