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Psyche 
[Vol. 94 
DAYS AT WEB SITE 
Figure 1 . Distribution of observed residence times compared to that expected by 
a random process (significantly different, p < 0.001). 
the residence time (days) at the site, was calculated for each web site 
occupied. There was a significant difference (t = 2.55; p < 0.05) 
between the feeding rates of spiders staying 1-5 days (x = 0.89; a 2 = 
0.59) versus those staying for 6 days or longer at a site (x = 1.5; a 2 = 
.53). 
Discussion 
Since the web is the only means an orb weaving spider has of 
encountering prey, web site selection has important consequences 
with respect to the spider’s fitness. Physiological studies have shown 
that finding a web site and building a web are energetically costly 
activities for orb weaving spiders (Witt et al., 1968; Peakall & Witt 
1976; Prestwich 1977). If behaviors associated with web site choice 
and tenacity have been selected for, then these choices should be 
