| 单词 | malthusian parameter |
| 释义 | > as lemmasMalthusian parameter Malthusian parameter n. Ecology the proportional rate of increase or decrease of a population, calculated from the birth rate, death rate, and age distribution. ΚΠ 1930 R. A. Fisher Genetical Theory Nat. Selection ii. 26 The number m..measures the relative rate of increase or decrease of a population when in the steady state appropriate to any such system. In view of the emphasis laid by Malthus upon the ‘law of geometric increase’ m may appropriately be termed the Malthusian parameter of population increase. 1983 E. C. Minkoff Evolutionary Biol. ix. 151/2 The quantity r is called either the Malthusian parameter or the ‘intrinsic rate of natural increase’. 1995 Ecology 76 2056/1 If fitness is approximated by the Malthusian parameter, those genotypes or species realizing a net shorter generation time will tend to increase in the population. < as lemmas |
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