scholarly journals Life tables and Leslie matrices for mammalian cohorts in different paleobiological contexts during the Pleistocene

TaphonomieS ◽  
2017 ◽  
pp. 477-508
Author(s):  
Philippe Fernandez ◽  
Christophe Bonenfant ◽  
Jean-Michel Gaillard ◽  
Hervé Monchot
Keyword(s):  

Author(s):  
Peter A. Henderson

This chapter describes techniques to create life-tables for animals whose generations overlap widely. Age-grouping is a prerequisite for these methods, which have been most widely applied to vertebrate populations. Age cannot be inferred from the developmental stage without reference to the environment. The speed of development may be temperature-dependent or influenced by factors such as oxygen and food availability. The methods for ageing animal groups, including invertebrates, fish, reptiles, amphibians, birds, and mammals, are reviewed. Time-specific life-tables, population modelling, and Leslie matrices are described. R code to analyze Leslie matrix dynamics is presented.


1945 ◽  
Vol 79 (784) ◽  
pp. 436-444 ◽  
Author(s):  
Thomas Park
Keyword(s):  

1979 ◽  
Vol 111 (11) ◽  
pp. 1299-1306 ◽  
Author(s):  
N. L. Bazinet ◽  
M. K. Sears

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 Several parasitoids produced substantial mortality of each host species, but their effect may have been superseded by winterkill in 1977.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.


1980 ◽  
Vol 8 ◽  
pp. 149-163 ◽  
Author(s):  
D.L. Deangelis ◽  
L.J. Svoboda ◽  
S.W. Christensen ◽  
D.S. Vaughan

1975 ◽  
Vol 35 ◽  
pp. 281-296 ◽  
Author(s):  
J. J. McCutcheon ◽  
J. C. Eilbeck

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.


1935 ◽  
Vol 13 (3) ◽  
pp. 223 ◽  
Author(s):  
Harry E. Seifert
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document