Pai, I.K.; Terdalkar, S.; Pereira, M.L.; Morado, F.M.
(Ecobioloy of Aquatic Insects, Ed. By: Arvind Kumar and Harbhajan Kaur. Daya Publising House, New Delhi. 2008; 24-51.)
Several groups of zooplankton exhibit Diel Vertical Migration (DVM), during which, hours of darkness are spent near the surface of the water and the day light hours at deeper depths. Though many earlier workers have worked ...