IUCN / SSC Cat Specialist Group - Digital Cat Library |
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| Berryman, A.A. | |
| Alternative perspectives on consumer-resource dynamics: a reply to Ginzburg | |
| 1999 Journal of Applied Ecology (68): 1263-1266 | |
1. Ginzburg (1998) proposes that models of predator-prey interactions should conform to what he calls the 'biomass conversion principle', that consumer reproduction should be directly linked to resource consumption. 2. I argue that consumer-resource models can be built from two different perspectives - biomass conversion or individual survival - and that, as Ginzburg's principle only applies to the first, it should not be used to judge the plausibility of individual survival models. 3. I also suggest that a failure to understand and preserve the distinction between biomass consumption and individual survival may be responsible for much of the confusion and controversy in predator-prey theory. |
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