Study on zooplanktons and water productivity of different lakes in jammu division, india

Introduction: Mansar and Surinsar Lake are the two important subtropical Lakes in Shivalik Hills of Jammu Province have been recognized as Ramsar Site owing to the rich diversity of both producer and consumers. The comparative study on water productivity of these two Lake had not been done yet. This study carried out to evaluate the productivity level of Mansar and Surinsar Lake as well as identification of different species of zooplankton. Method: Water samples are collected from both Lakes (Mansar and Surinsar) in the month of April in 2018 for productivity. The primary organic production of the river water was determined by ‘light and dark bottle method’. The zooplankton was observed under a microscope with 400X magnification and their number could be countered by using Sedgewick rafter cell under a microscope. Results: The investigation showed that the collected sample of water from both the Lakes having the valve of NPP between the 50-250 mgl/m/hr. The value of NPP shows that the water of these two Lakes is coming under Oligotrophic i.e. Nutrients content is less. Few species of zooplanktons are found which comes under the group Protozoa (2 sps.), Rotifers (1 sps.), Cladocera (2 sps.), Copepoda (2 sps.) and Arthropoda (1 sp.). Conclusion: The productivity of these two Lakes is directly correlated with zooplanktons productions, which are less in number. Presence of less number of zooplankton might be due to the pollution level is higher. The environment of these Lakes are not suitable for the cultivation of fishes and therefore, some steps should be taken for up gradation of the Lakes water quality, so that, faunal community or biodiversity of the Lakes may sustain properly.