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* The parameters j and K only appear as the product jK in the calculations for the values in Tables 13.1 and 13.2. From equation (13.30), j K = (K/Kj )(a + a)(a + a)/a, so that only a knowledge of the ratio of the actual carrying capacity to the critical value is necessary to obtain the results.

* The parameters j and K only appear as the product jK in the calculations for the values in Tables 13.1 and 13.2. From equation (13.30), j K = (K/Kj )(a + a)(a + a)/a, so that only a knowledge of the ratio of the actual carrying capacity to the critical value is necessary to obtain the results.

Wandeler 1980, Macdonald et al. 1981, Gurtler and Zimen 1982). Since finding K/Kt only involves comparison of population sizes, this ratio might be easier to obtain than K and KT separately.

A relevant question at this point is how sensitive the quantitative results are to the uncertainties in the parameters. This aspect and difficulties in estimating other parameters are discussed by Murray et al. (1986).

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