Abstract
where a = area of discovery; kp = k-value for mortality caused by the parasite; and P = parasite density, and the whole model used to test the theoretical implications of variations in area of discovery of the parasite and/or the strength of the density-dependent mortality. Of several limitations in the model the inclusion of k5 the pupal mortality, as a simple linear relationship between the density of healthy fifth instar larvae (in logs) and the mortality of pupae (expressed as a k-value), presented a considerable over simplification of the complex process of predation. The model is unsatisfactory because it neither seeks to describe predator behaviour, nor generates a predator population estimate which can be compared with observed figures. k5 was expressed in the form:
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