Types of life tables | ScienceGate

AbstractMortality factors affecting populations of the leafminers Argyresthia thuiella (Pack.) and Pulicalvaria thujaella (Kft.), on eastern white cedar in the area of Guelph, Ontario were identified and summarized in life tables. During the two annual generations studied from 1975 to 1977, overwintering mortality varied widely. Winterkill increased from 6.8% to 62.9% for A. thuiella and from 8.1% to 54.6% for P. thujaella, from 1976 to 1977. Several parasitoids produced substantial mortality of each host species, but their effect may have been superseded by winterkill in 1977. Data indicate that both populations of leafminers increased from 1975 to 1976 but decreased substantially from 1976 to 1977.

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Quasi Life Tables

Encyclopedia of Statistical Sciences ◽

10.1002/0471667196.ess0714.pub2 ◽

2006 ◽

Author(s):

L. A. Baxter

Keyword(s):

Life Tables

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AUSTRALIAN LIFE TABLES, PROM A MEDICAL POINT OF VIEW

The Medical Journal of Australia ◽

10.5694/j.1326-5377.1951.tb68280.x ◽

1951 ◽

Vol 2 (8) ◽

pp. 251-258 ◽

Cited By ~ 6

Author(s):

H. O. Lancaster

Keyword(s):

Life Tables ◽

Point Of View

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Experiments in the Graduation of the English Life Tables (No. 13) Data

Transactions of the Faculty of Actuaries ◽

10.1017/s0071368600009630 ◽

1975 ◽

Vol 35 ◽

pp. 281-296 ◽

Cited By ~ 2

Author(s):

J. J. McCutcheon ◽

J. C. Eilbeck

Keyword(s):

Life Tables ◽

Time Of Death ◽

Investigation Period ◽

Salient Features ◽

The Government

By courtesy of the Government Actuary, the preliminary crude data relating to the proposed English Life Tables (No. 13) were made available to the authors. In this paper various graduations derived from these data “are described and an outline is given of the salient features of each.The investigation covered the calendar years 1970, 1971, and 1972. For each integer x ≥ 2 the values of θx, the number of deaths during the investigation period aged x last birthday at the time of death, and Exc, the corresponding central exposure to risk, were available for both sexes. The central exposures to risk were obtained using population totals from the 1971 national census, by a method similar to that described in Appendix I of reference 4.

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