Barrier Island Small Mammals 
131 
Table 1. Summary of small mammal trapping on Bulls Island, December 1978 
to February 1979. 
Habitat 
Number 
of days 
trapped 
Number 
of trap 
nights 
Number and 
genera of mam- 
mals captured 
Relative 
abundance 
value (RAV)"' 
Fore and rear 
sand dunes 
13 
560 
9 Oryzomys 
1.6 
Salt spray 
forest 
13 
578 
17 Oryzomys 
2.9 
Maritime live 
oak forest 
13 
616 
3 Oryzomys 
0.5 
2 Peromyscus 
0.3 
Freshwater 
marsh 
4 
186 
5 Oryzomys 
2.7 
Salt marsh 
10 
381 
36 Oryzomys 
9.4 
1 Sigmodon 
0.2 
Old-field 
9 
432 
1 1 Sigmodon 
2.5 
3 Oryzomys 
0.7 
Residential 
area 
4 
156 
4 Peromyscus 
2.6 
3 Mus 
1.9 
1 Oryzomys 
0.6 
All Habitats 
17 
2909 
74 Oryzomys 
12 Sigmodon 
• • • • 
6 Peromyscus 
3 Mus 
''The percent trapping success for each species in each habitat. 
