Table 1.

Features of viscous threads and the conditions under which they were measured

Primary droplets Secondary droplets
SpeciesNSpider mass (mg)Primary droplets per mmLength (μm)Width (μm)Length (μm)Width (μm)Temperature (°C)Relative humidity
Argiope aurantia 5841.9±138.73.5±0.462.7±3.240.2±6.320.9±2.310.2±1.323.7±0.148.6±0.3
Araneus marmoreus 10498.5±74.23.7±0.367.1±4.550.2±3.626.4±2.5 (7)15.9±1.7 (7)24.1±0.451.5±2.1
Argiope trifasciata 11510.8±82.06.1±0.641.5±2.525.1±1.822.5±2.010.8±0.922.5±0.239.1±3.4
Araneus bicentenarius 6407.0±67.66.2±1.750.5±5.141.5±4.721.5±3.413.4±2.424.0±0.048.5±0.5
Larinioides cornutus 4265.9±27.26.2±1.441.6±6.430.6±4.933.1±8.422.8±6.523.5±0.554.6±0.8
Verrucosa arenata 574.3±12.27.4±0.827.9±1.022.5±0.99.7±1.7 (4)6.3±1.5 (4)23.6±0.252.0±0.9
Araneus pegnia 965.7±7.1 (8)8.6±0.738.6±3.628.3±2.416.2±5.7 (3)10.0±4.0 (3)23.3±0.253.8±0.4
Micrathena gracilis 573.4±9.59.9±1.930.2±2.223.5±1.814.3±1.5 (4)8.2±1.0 (4)23.6±0.251.6±1.2
Theridiosoma gemmosum 52.8±0.2 (4)11.0±1.414.4±3.411.6±2.19.2±2.96.5±2.124.0±1.554.9±1.5
Micrathena sagittata 546.8±5.511.4±2.025.9±1.420.0±1.310.7±1.86.5±1.424.1±0.351.1±1.2
Tetragnatha elongata 471.0±17.2 (3)13.0±1.428.2±4.820.0±3.110.3±0.6 (3)4.9±1.3 (3)26.0±0.054.6±0.1
Metepeira labyrinthea 810.4±1.017.5±3.523.5±1.916.4±1.49.3±1.35.4±1.023.5±0.253.1±0.5
Meta ovalis 819.3±2.2 (7)20.6±2.414.9±0.911.9±0.95.2±0.63.5±0.523.6±0.249.6±0.5
Leucauge venusta 1022.0±3.129.9±2.113.8±1.210.0±0.95.6±0.5 (7)3.9±0.4 (7)22.6±0.243.2±1.4
Cyclosa turbinata 97.2±0.8 (8)33.4±6.913.2±1.09.8±0.87.0±0.34.9±0.222.6±0.232.1±5.0
Mangora maculata 611.2±1.067.6±9.04.4±0.34.5±0.23.0±0.2 (4)3.2±0.2 (4)23.6±0.250.6±0.5
  • Means ± 1 s.e. Numbers in parentheses give the sample size if less than that listed in the second column