Inter-specific and Intra-specific interactions are the well known phenomenon in various zooplanktonic communities of any aquatic ecosystem and these interactions are very essential for their survival and flourishment. To understand this interrelationship, investigation on zooplankton diversity and abundance was carried out for a period of one year in a perennial, shallow and highly polluted Dilli Pond located in Jammu district of J&K state. Twenty nine species of zooplankton were identified from Dilli pond belonging to 5 different groups viz. Protozoa, Rotifera, Copepoda, Cladocera and Ostracoda. Quantitative abundance showed the dominance of Copepoda because they have toughest exoskeleton and versatile feeding habits which ultimately assist them to hold up harsh environmental conditions as compared to other zooplanktonic groups. Correlation studies among various zooplankton groups showed both positive and negative correlation during the study period. Copepods showed positive correlation with Protozoa, Rotifera and Cladocera.
