BULLETIN FLORIDA MUSEUM NATURAL HISTORY VOL. 38, PT. 11(7)


Podomys is absent. Prescribed fires maintain the open habitat and the tortoise populations
on which these mice rely on the Ordway Preserve.
 Trapping on grids provided estimates of home range size and persistence, as well as
demonstrating the exclusivity of home ranges of adult females. There also was evidence
that males had larger home ranges that occasionally overlapped with each other and with
females. However, results from trapping at burrows suggest that estimates from grids were
too small. Evidently the "standard" mammal-trapping grid (10000 m2 with 10-m trap
intervals) was insufficient to measure home ranges of Podomys in sandhills. Doubling the
trap interval to 20 m would produce a grid covering 40000 m2, which would encompass
mean home ranges estimated at burrows for females (2601 m2) and males (4042 m2), might
be more useful. No fewer than 100 trap stations should be used. However, increasing grid
size on some sandhills will spread the grid into neighboring habitats.
 Estimates of home range produced by trapping at burrows were comparable with
 values reported for Peromyscus. Stickel (1968) reported that home ranges of Peromyscus
 varied from 0.1 to 10 acres. Hoffmeister (1981) reported mean home ranges for female
 (8290 m2 +/- 2688) and male (10465 m2 +/- 4043) P. truei in pinon-juniper habitat, also
 using the exclusive boundary strip method. Although the range of home areas of Podomys
 varies considerably, further research might show that my means are underestimates, based
 as they are on many individuals located on the edges of my study sites. I also have no
 measure of vertical habitat use; for example, it would be interesting to determine whether
 the mice occupy a larger home range volume in years when acorns are produced.
 In analyses of both burrow and grid data, I omitted animals that were recaptured less
 than three times. A possible consequence of this approach is that several animals might
 occupy the same space. However, the fact that both sets of data show abutment of home
 ranges of adult females seems good evidence of mutually exclusive home ranges, which
 suggests that females might be territorial.


 LITERATURE CITED


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 association in north central Florida. Quart. J. Florida Acad. Sci. 22:94-104.
 Brand, S. M. 1987. Small mammal communities and vegetative structure along a moisture gradient. M.S.
 Thesis, Univ. Florida, Gainesville, 99 pp.
 Burt, W. H. 1943. Territoriality and home range concepts as applied to mammals. J. Mamm. 24:346-352.
 Davis, D. E. 1956. Manual for analysis of rodent populations. Privately published. Baltimore, Maryland,
 82 pp.
 Eisenberg, J. F. 1968. Behavior patterns. Pp. 451-495, in J. A King, ed. Biology of Peromyscus
 (Rodentia). Spec. Publ., Amer. Soc. Mamm. 2:1-593.
 1988. Mammalian species of the Ordway Preserve. A reference for students. Ordway Pres. Res.
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 Gates, C. A., and G. W. Tanner. 1988. Effects of prescribed burning on herbaceous vegetation and pocket
 gophers (Geomys pinetis) in a sandhill community. Florida Sci. 51:129-139.
 Hoffmeister, D. F. 1981. Peromyscus true. Mamm. Species 161:1-5.
 Humphrey, S. R., J. F. Eisenberg, and R. Franz. 1985. Possibilities for restoring wildlife of a longleafpine
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 Jones, C. A 1990. Microhabitat use by Podomys floridanus in the high pine lands of Putnam County,
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