92 



F. BOURLIERE 



the ly. columns in their Hfe-tables, are shown in Figs. 1 and 2. 

 Survival curves of both sexes taken together are given in 

 Fig. 3 for barren-ground caribou. Original figures on which 

 these calculations were based have been published by Evans 

 (1891) for Cervus elaphus of the island of Jura off Scotland, by 



FEMALES 



black-tailed oeer 

 (chaparral) 



OALL SMEEP 



I 



Fig 



2, Survival curves for females of five un- 

 gulate populations. 



Murie (1944) for Ovis dalli of Mount McKinley National Park 

 in Alaska, by Andersen (1953) for Danish Capreolus capreolus 

 of the Game Research farm of Kalo and by Taber and Das- 

 mann (1957) for Odocoileus hemionus of California. Data for 

 Canadian Rangifer arcticus are from Banfield (1955). All 

 these populations, except that of dall sheep, were hunted, 

 either by sportsmen or natives. 



