1. The Social Use of Space 



29 



B. Chadwick Woods, Montgomery County, Maryland, Removal Study, 

 1958-1959— Data Contributed by Kyle R. Barbehenn 



Five circular traplines, each with a radius of approximately 300 feet, 

 were used. The number of traps per station and the interval between 

 stations varied among the lines. However, for the present purposes these 

 differences are unimportant. As with the Rich Lake Island study, the 

 genus, here Peromyscus, with the initial most rapid input was represented 

 by only half as many (57) captures as another genus, Blarina, which 

 entered the traps more slowly (116 taken) (see Fig. 10). A third genus, 

 Sorex, began its period of maximum captures only after the majority of the 

 other two genera had been removed, but only 48 were captured. Note that 

 Peromyscus exhibited a fairly rapid rate of capture until approximately 

 65% of the 30-day total had been taken. Following an intervening period 

 with very few captures, there ensued a secondary period of increased 

 captures. 



CHADWICK WOODS- MONTGOMERY COUNTY, MARYLAND 



10 15 20 



DAY OF TRAPPING 



25 



30 



Fig. 10. Differential "schedules" of entering traps expressed by the three species 

 recorded by Dr. Kyle Barbehenn in his study of continuous removal trapping in an 

 upland hardwood forest. 



C. Comparative Catches, Huntington Wildlife Forest, 1952-1953— Data 

 Contributed bv Earl F. Patric and William L. Webb 



During these two years Peromyscus and Blarina were universally scarce 

 on the Huntington Forest. In order to determine the general pattern of 

 their input, data from five separate plots must be pooled. 



