Distribution of mammals in Colorado Distribution of mammals in Colorado distributionofma31972arms Year: 1972 10 MONOGRAPH MUSEUM OF NATURAL HISTORY NO. 3 107 105 103 38 40 38 Fig. 2. Percentage distribution of specimens examined by county. Legend: 4 per cent or greater, cross- hatched; 2-4 per cent, diagonal lines; 1-2 per cent, stippled; less than 1 per cent, unshaded. ranges, and montane mammals better than campestrian taxa. Other factors, such as loca- tion of a center of abundance relative to a concentration of collectors, augment the dif- ferential representation of species in collec
Distribution of mammals in Colorado Distribution of mammals in Colorado distributionofma31972arms Year: 1972 10 MONOGRAPH MUSEUM OF NATURAL HISTORY NO. 3 107 105 103 38 40 38 Fig. 2. Percentage distribution of specimens examined by county. Legend: 4 per cent or greater, cross- hatched; 2-4 per cent, diagonal lines; 1-2 per cent, stippled; less than 1 per cent, unshaded. ranges, and montane mammals better than campestrian taxa. Other factors, such as loca- tion of a center of abundance relative to a concentration of collectors, augment the dif- ferential representation of species in collec- tions. Peromyscus difficilis is fairly abundant immediately west of Fort Collins, for example, and is rather well represented in collections, whereas Peromyscus crinitus is abundant in western Moffat County, but few collections have been made there. As a result, the canyon mouse is far less well represented in collec- tions than is the rock mouse. The approximate percentage of the total number of specimens I examined that were collected in a given county is given in figure 2. Obviously, the distribution of collectors has been far from random. Some specimens have been examined from each county in Colorado, but absolute numbers range from two (Phil- lips County) to 3763 (Larimer County). Five counties (Larimer, Roulder, Rio Blanco, Gun- nison, and Montezuma) account for about 35 per cent of all specimens examined. The wide variation in numbers of specimens available per county is almost entirely attributable to the distribution of collecting efforts. Within a given county, distribution of lo- calities tends to be highly contagious. For that reason, to adjust numbers of specimens available to the absolute size of a county is not necessarily meaningful. Regardless of the size of a county, specimens tend to be from a relatively small number of localities. Lari- mer County is the source of nearly one- seventh of all specimens examined, but the
Size: 1537px × 1301px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
