TABLE 1. Tarantula species studied in these experiments, numbers of individuals involved (F/M = females/males), range of lengths of the specimens, the environments and geographic locations that the tarantulas inhabit.

Species # Individuals
(F/M)
Length
(cm)
Environment Location
Hysterocrates gigas 5/3 6 Subtropical to tropical forests West Africa
Pelinobius muticus 6/2 2 Scrublands and grasslands East Africa
Aphonopelma chalcodes 5/3 5 Semi-arid desert Western North America

 

TABLE 2. Experimental parameters used for each tarantula species including terrarium size (in liters), sediment content and depth (in cm), air temperature, and sediment moisture. Sediment components include organic matter (OM), clay (CL), and sand (SA).

Species Terrarium Size
(L)
Sediment Sediment Depth
(cm)
Temperature
(°C)
Moisture
(%)
Hysterocrates gigas 114, 212, 246 OM, CL 35, 50, 55 25-32 60
Pelinobius muticus 114, 212, 246 OM, CL 35, 50, 55 25-30 40
Aphonopelma chalcodes 114, 212, 246 CL, SA 35, 50, 55 25-32 20

 

TABLE 3. Quantitative measurements of tarantula burrows. All measurements in cm or degrees (slope only); W/H ratio, complexity, and tortuosity are unitless. HG# = Hysterocrates gigas burrow cast identification number; PM# = Pelinobius muticus burrow cast identification number; AC# = Aphonopelma chalcodes burrow cast identification number.

Hysterocrates gigas
ID Openings Depth Length Max Width Min Width Mean Width Max Height Min Height Mean Height W/H Ratio Max Circ Min Circ Mean Circ Max Slope Min Slope Mean Slope Complexity Tortuosity
HG1 1 12.0 24.0 9.6 6.8 8.4 5.9 3.3 4.9 1.7 24.5 20.5 23.2 90 25 49 3 1.26
HG2 1 18.0 18.0 8.1 2.3 5.1 6.2 2.8 4.9 1.0 24.5 9.5 16.5 90 90 90 4 1.09
HG3 1 5.9 6.3 3.8 3.3 3.5 4.2 2.9 3.3 1.1 13.0 11.5 12.2 90 90 90 2 1.00
HG4 1 14.5 17.0 8.1 3.2 6.0 7.8 3.8 6.0 1.0 24.5 12.0 19.5 90 70 80 4 1.06
HG5 1 31.0 36.0 9.7 2.8 4.9 7.0 2.8 4.3 1.1 28.0 10.5 17.4 90 40 83 3 1.16
HG6 1 19.5 26.0 8.9 2.5 6.0 6.1 2.0 4.2 1.4 24.5 8.5 17.7 90 0 60 4 1.16
HG7 1 31.0 70.0 10.2 1.2 5.3 8.7 1.4 4.7 1.1 28.0 4.0 15.8 90 0 46 5 1.56
HG8 1 46.0 59.0 8.3 5.8 7.0 7.8 5.3 6.3 1.1 25.0 21.0 22.0 80 40 60 4 1.28
HG9 1 53.0 84.0 11.6 4.1 5.8 8.7 3.4 5.5 1.1 31.0 14.0 21.0 90 0 80 6 1.53
HG10 1 20.0 25.0 7.7 4.9 6.9 8.1 3.9 6.6 1.0 27.0 15.0 19.5 90 70 85 3 1.25
Pelinobius muticus
ID Openings Depth Length Max Width Min Width Mean Width Max Height Min Height Mean Height W/H Ratio Max Circ Min
Circ
Mean Circ Max
Slope
Min Slope Mean Slope Complexity Tortuosity
PM1 1 30.0 42.0 4.1 2.9 3.5 4.4 2.9 3.7 0.9 13.5 10.0 11.8 90 20 60 3 1.40
PM2 1 27.0 45.0 4.2 1.8 2.6 2.7 1.6 2.2 1.2 12.5 7.0 8.3 90 10 54 6 2.06
PM3 1 48.5 53.0 4.7 2.2 3.0 8.8 2.3 4.1 0.7 14.0 6.5 9.5 90 0 67 3 1.10
PM4 1 34.0 64.0 5.1 2.2 3.3 4.5 2.0 2.9 1.1 16.0 7.5 10.5 90 0 48 6 1.52
PM5 1 41.0 72.0 6.5 3.2 5.6 6.1 2.8 5.4 1.0 20.5 10.5 16.5 90 0 55 4 1.57
PM6 1 34.0 46.0 4.1 2.5 2.9 4.0 2.5 2.8 1.0 13.0 9.0 10.5 80 0 60 3 1.07
PM7 1 38.0 73.0 4.7 2.3 3.2 4.0 1.8 2.9 1.1 14.2 6.5 10.1 90 10 50 4 1.22
PM8 1 41.0 60.0 4.8 2.4 3.1 4.7 1.9 2.9 1.1 17.5 7.0 11.0 90 0 80 6 1.62
Aphonopelma chalcodes
ID Openings Depth Length Max Width Min Width Mean Width Max Height Min Height Mean Height W/H Ratio Max Circ Min Circ Mean Circ Max Slope Min Slope Mean Slope Complexity Tortuosity
AC1 1 9.5 17.9 7.6 3.6 6.6 6.7 2.5 5.1 0.8 22.2 11.1 19.1 55 0 28 2 1.04
AC2 1 3.1 6.1 3.7 2.9 3.4 2.4 1.2 1.9 0.5 10.9 7.1 9.5 25 25 25 2 0.98
AC3 1 7.5 13.5 6.0 8.3 7.9 6.1 8.2 7.0 1.0 19.2 7.4 16.6 35 19 25 3 1.00
AC4 1 9.8 21.3 8.3 5.0 6.5 8.2 4.6 6.5 1.0 25.4 17.6 21.7 62 21 35 3 1.84
AC5 1 8.6 14.9 7.9 3.5 6.6 7.0 2.3 5.2 1.3 23.3 9.9 19.1 28 21 27 2 1.00
AC6 1 21.2 58.8 11.6 6.8 7.7 6.7 3.4 5.2 1.5 2.7 1.8 2.2 55 17 28 3 2.50
AC7 1 20.0 38.0 6.8 4.8 5.8 7.2 2.9 4.7 1.2 22.3 14.0 18.0 90 0 41 3 1.06
AC8 1 16.0 35.0 9.3 6.6 7.5 5.6 1.7 4.2 1.8 23.0 13.0 19.3 75 40 50 2 1.03
AC9 1 12.0 13.5 8.8 5.1 7.1 6.4 2.1 3.9 1.8 25.0 9.5 18.7 90 60 77 2 1.04