Bufo woodhousii fowleri 
69 
Toads were significantly more abundant on the island than on 
the mainland in both years. We captured Bufo woodhousii fowleri 
in all habitats at each location except primary dunes on the island 
and meadows on the mainland. Although habitat had no significant 
effect on toad abundance in areas where toads were captured, toads 
in deciduous and coniferous forests made up a large portion of the 
mainland sample in 1988 (82.2%, 17.8%) and in 1989 (75.7%, 24.3%). 
Toads in coniferous forests and meadows made up a large portion 
of the island sample in 1988 (67.4%, 32.6%) and in 1989 (81.5%, 
18.5%). Sex ratios close to 1:2 in 1988 (x 2 = 1.049, P > 0.25) 
and 1:1 in 1989 (x 2 = 0.26, P > 0.50) on the island (Table 1) and 
close to 1:1 in 1988 (x 2 = 0.600, P > 0.25) and 1:2 in 1989 (x 2 = 
0.318, P > 0.50) on the mainland were observed. 
The mean snout-vent lengths (SVL) and masses of B. w. fowleri 
were significantly larger in 1989 than 1988 at both locations (is- 
land-15. 1%, 53.0% and the mainland-18. 1%, 66.8%). However, mainland 
toads were significantly larger than island toads in both years (Table 
1). Male and female toads were not sexually dimorphic in size at 
either location (Table 1). 
We observed size classes, detected by probit analysis, of 25- 
45 and 46-57 mm SVL on the island in 1988 (Fig. 1); whereas 
two juvenile size classes (18-20 and 21-35 mm), which represent 
recruitment from the previous year in forest and meadow habitats, 
and one adult size class (36-57 mm) were observed in 1989. The 
Fig. 1. Size frequency distributions of Bufo woodhousii fowleri collected 
in pitfall traps in 1988 and 1989 on Assateague Island (above the x-axis) 
and the adjacent mainland (below the x-axis). 
