Table 1.

Primary droplet dimensions of the six species studied and the environmental conditions under which their thread stickiness was measured

Cyclosa turbinata (9)Leucauge venusta (10)Metepeira labyrinthea (8)Araneus pegnia (9)Argiope trifasciata (11)Araneus marmoreus (10)
Spider mass (mg)7.2±0.922.1±3.138.0±3.665.7±7.1534.9±86.3548.3±75.4
Droplets (mm-1)27.51±1.2131.38±0.9918.99±1.6910.05±0.406.67±0.284.26±0.17
Droplet length (μm)13.2±1.013.8±1.223.5±1.938.6±3.141.5±2.567.1±4.5
Droplet width (μm)9.8±0.810.0±0.916.4±1.428.3±2.425.1±1.850.2±3.6
Droplet spacing (μm)26.2±2.920.1±1.746.6±10.672.4±7.8149.9±24.0264.2±53.8
Percent secondary droplet volume10.8±1.74.3±1.56.4±1.80.4±0.18.9±2.15.4±1.2
Temperature (°C)22.6±0.122.6±0.123.5±0.123.5±0.122.4±0.124.1±0.2
% Relative humidity32±2C43±1A,B53±0A54±0A38±2B,C51±1A
Barometric pressure (mmHg)1016±21016±11017±11017±11014±11015±1
  • Values are means ± 1 s.e.m. (N values are given in parentheses after species names).

    Percent secondary droplet volume is relative to the total droplet volume per mm of capture thread.

    For relative humidity, letters denote the ranking (high to low) established by a Ryan—Einot—Gabriel—Welsch Multiple Range Test (P=0.05).