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A small-scale study investigating the directional dispersal patterns of Chorthippus parallelus in a grazed pasture was undertaken in 2002 and 2003. The study site was divided into 4 quadrants with a central release circle. Nymphs and adults were marked, released and resighted at varying intervals throughout the day, when the distance and direction moved (taken from the center) were recorded for each individual. Significant directional movements to the north of the release circle were evident for both nymphs and adults. These movements were probably in response to habitat factors and topography outside of the release area. Both nymphs and adults moved uphill from the heavily grazed 'spatially hostile' release circle, to patches of tall ungrazed grass beyond the release area. These patches of ungrazed grass could have afforded shelter, from predation and inclement weather, not provided by the short vegetation inside the release area.

Directional dispersal patterns of Chorthippus parallelus (Orthoptera: Acrididae) in patches of grazed pastures