Letter | Published:

Williamson's Theory of Interspecific Competition


I AM glad that Drs. Andrewartha and Browning have been able to go some way with me. I hope that the following remarks will help them to travel further. The example of the car was used as an analogy, not as an argument. Any population that persists for more than a few generations must be controlled: any car that progresses more than a few yards without accident must be steered. To say that no age distinctions are recognized does not mean that all individuals are of the same age. It means that the probability of an event, such as being eaten, happening to an individual is independent of that individual's age. My other assumptions should be interpreted in the same sort of way. I made no assumptions about food; the only one needed is that there is enough of it. Land snails are usually hermaphrodite and so all of the same sex.

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