1987] 
Hodge — Orb weaving spider 
353 
Mean distance moved =4.42 m 
Figure 3. Release points and end points of spiders released into the deciduous 
forest (solid circles indicate release point, open circles indicate where the spider was 
seen last). 
Several observations of spider behavior and web condition sug- 
gest additional environmental differences between pine and decidu- 
ous forests that may affect web site tenacity. Spiders under heat 
stress hang on the web in such a way as to minimize the amount of 
body surface area exposed to the direct rays of the sun (Krakauer 
1972; Carrel 1978; Robinson & Robinson 1974, 1979; Biere 1977; 
Biere & Uetz 1981). Five days of observations made at 3 hour inter- 
vals revealed that by 1200 hours, all spiders in the pine stand were 
assuming this thermoregulatory position. None of the spiders in the 
deciduous forest were ever observed to posture in this manner. This 
