138 
Table 1 
Numbers” of collared lemmings on three grid areas 
near Prudhoe Bay during the summers of 1971 and 1972. 
mid-June early July late July mid-Aug. 
June July Aug. (19-23) (5-9) (24-31) (21-25) 
1971 1971 1971 1972 1972 1972 1972 
Numbers 
Grid P 
Male: << 25q°* 
25-50g 
> 50g 
Female: < 25g 
26-50g 
> 50g 
TOTAL 
(New) 
Grid O 
Male: < 25g 
25-50g 
> 50g 
Female: < 25g 
25-50g 
> 50g 
TOTAL 
(New) 
Grid S 
Male: < 25g 
25-50g 
> 50g 
Female: < 25g 
25-50g 
> 50g 
TOTAL 
(New) 
*Numbers given represent estimated minimum numbers present 0.25 ha! grid area at each time, based on numbers 
captured. 
**Each sex has been grouped into three weight classes which are assumed to approximate the age classes of juvenile 
(< 25g), subadult (25-50g), and adult ( >50g). 
p = pregnant. 
+In late August two arctic ground squirrels (Cite//us undulatus) were captured in grid P. 
