Influence of spatial heterogeneity and prey density on predatory behaviour of the tropical spidersCyrtophora cicatrosa (Stoliczka) andMarpissa calcutaensis (Tikader) (Araneae, Araneidae)
Tropical spidersC. cicatrosa andM. calcutaensis were allowed to predate individually in different terraria at different prey densities. Both the species were satiated within 5 hr of predation in all the volumes. Prey density exerted significant influence on the predatory behaviour of both the species. The predation increased with increasing prey density, but the volume of terraria exerted only marginal influence. The functional response curve ofC. cicatrosa andM. calcutaensis was neither linear nor sigmoid, but was curvilinear representing type II response of Holling’s model.