Night Range Sizes Based Upon Use and Time of Night
The night ranges (n = 14) calculated from minimum convex polygons
(MCP-NR) varied between 1.14 ha and10.62 ha (Table 1), and were
~1.75 times larger than the singing ranges (MCP-SR)
(Z = 2.31, r = 0.47 Table 1). Average nightly singing did
not correlate with MCP-NRs (ρAveS-MCPNR= - 0.26, p =
0.42) or MCP-SRs (ρAveS-MCPSR = 0.50, p = 0.1; Table 1).
The areas we calculated from the 95% isopleths for all points (NR)
varied from 0.97 ha to 11.4 ha (Table 3, Figs 2, 4). The mean 95% NRs
were ~1.75 times larger than SRs
(t11 = 2.201, p < 0.01, d= 0.86; Table 1, Figs. 2, 4). Core NRs were 1.9 times larger than core
SRs (t11 = 3.201, p = 0.01, d = 0.89;
Table 1, Figs. 2, 4). However, centroid coordinates showed insignificant
shifting in the location of NRs and SRs
(x̄AbsDiffLongitude = 8 ± 11 m,
x̄AbsDiffLatitude = 10 ± 13 m,T2 = 0.62, F(2,10) =0.28, p = 0.76, Fig. 2, 4). The amount of nightly singing did not
correlate with SR or NR (ρ MeanS-.95SR =0.14, p = 0.66; ρ MeanS-.5SR = 0.032, p =
0.92; ρ MeanS-.95NR= -0.36, p = 0.26;
ρMeanS-.5NR = -0.55, p = 0.07). However, bats
that spent more time singing in particular perches had smaller core
singing areas (r = -0.6, p = 0.04, Fig. 2).
We found no difference in the size of the ranges used early in the night
(ER) or later at night (LR) (Z = 0.19 , p = 0.86, r =
0.036; Median.5ER = 0.61ha, Median.5LR =
0.63 ha, Z = 0.69, p = 0.5, r = 0.691; , Fig. 2), nor were
these areas shifted spatially according to centroid comparison
(x̄AbsDiffLongitude = 18 ± 15 m,
x̄AbsDiffLatitude = 31 ± 32 m,T2 = 1.908, F2,12 =0.88, p = 0.44). LR and SR differed in size (t11= 2.201, p = 0.08, d = 0.56; t11 = -1.57, p
= 0.15, d = 0.45, Fig. 2). 95% isopleths of ER were larger than
those of SR (t11 = -2.53, p = 0.028, d =
0.73), but not their core areas (t11 = -2.124, p
= 0.06, d = 0.61, Fig. 2).