Compositional interpretations of medfly mortality.
Compositional interpretations of medfly mortality.
复制标题
地中海果蝇死亡率的组成解释。
DOI:
10.1126/science.8503016
复制
发表时间:
1993
期刊:
影响因子:
--
通讯作者:
Carey,JR
中科院分区:
文献类型:
--
作者:
Vaupel,JW;Carey,JR
Death rates for a cohort of 1.2 million Mediterranean fruit flies (Ceratitis capitata) rose and then fell with age (Fig. 1)(1). If this pattern reflects age changes for individuals, biological theories of aging may have to be rethought (2). On the other hand, the age trajectory may be an artifact of the evolving structure of the population (3). Death changes the composition of a cohort by differentially removing the frail. It is possible that the age trajectory of mortality for medflies at any specific degree of frailty actually rises steadily with age. We have closely fitted the observed medfly mortality pattern (1) with mixtures of increasing Gompertz (4) or Weibull (5) curves. Let 9 (x) denote the proportion of a cohort that survives to exact age x, where 5 (0)= 1, and where the cohort is extinct or no longer observed at age w. Assumethat the hazard of death at age x for individuals with fixed frailty z is given by K (x, z). If s (x, z) denotes the proportion of individuals with frailty z who survive to exact age x, then s (x, z)= e-fl 1 (cz) dt 0
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
J. Hoem
通讯作者:
J. Hoem
影响因子:
56.9
作者:
CURTSINGER, JW;FUKUI, HH;VAUPEL, JW
通讯作者:
VAUPEL, JW
影响因子:
56.9
作者:
CAREY, JR;LIEDO, P;VAUPEL, JW
通讯作者:
VAUPEL, JW