An Analysis of Swarming in Panagrellus Redivivus

Synchronous swarming has been reported from many species of zooparasitic and phytoparasitic nematodes. The phenomenon has been variously attributed to cuticular changes, tactile senses and the chemical nature of the environment. Through the microcinematographic analysis of Panagrellus redivivus, both isolated individuals and synchronous swarms, it has been shown that synchronous swarming is dependent on the characteristics of locomotion and the physical forces in the environment. The age and species specificity of swarms need not involve sensory recognition, but is merels a function of movement.