. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. 160 R. J. H. Beverton and S. J. Holt Interspecific relations between maximum age (Tj^ax)* mortality rate (M), asymptotic length (L^) and growth rate (K) Table I lists, for each species, values of a pair of parameters defining lifespan and the force of mortality {T^^^ and M) and a pair defining the asymptotic size of the organism and the rate at which that size is attained {L^ and K). The para- meters T^iax ^^d ^ ^r^' of course, closely linked on purely. 50 lOO mathematical grounds; there is no a priori
. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. 160 R. J. H. Beverton and S. J. Holt Interspecific relations between maximum age (Tj^ax)* mortality rate (M), asymptotic length (L^) and growth rate (K) Table I lists, for each species, values of a pair of parameters defining lifespan and the force of mortality {T^^^ and M) and a pair defining the asymptotic size of the organism and the rate at which that size is attained {L^ and K). The para- meters T^iax ^^d ^ ^r^' of course, closely linked on purely. 50 lOO mathematical grounds; there is no a priori reason why L^and_ K should be, but it appears from the data that they ar'e fairly, closely correlated (inversely), although there are some im- portant exceptions. In this paper we therefore consider only two of the possible relationships, that between T^^ax ^^^ -^oo concerning the extremes of age and size, and that bfijtw£^n M and K which, in effect, refer to the course of events within the lifespan. Other possible relationships which might give a better interpretation of the available data are under investiga- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ciba Foundation; Wolstenholme, G. E. W. (Gordon Ethelbert Ward). Boston, Little, Brown
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