Ojah, M. L.Rathor, R. P.2017-10-112017-10-112016Rathor and Ojah, 2016http://krishikosh.egranth.ac.in/handle/1/5810032849Growth performance of Indian major Carps vis-a-vis biotic factors in selected micro-watersheds of Southern RajasthanThe present study deals with the“Growth performance of Indian major Carps vis-a-vis biotic factors in selected micro-watersheds of Southern Rajasthan”. A total 20 microwatersheds of four districts (Udaipur, Dungarpur, Banswara and Pratapgarh) of Rajasthan were chooses for this purpose.water quality parameters viz.,water temperature (26.2- 32.7􀀀C), pH (7.3-10.05), dissolved oxygen (6.71-10.21mg/l), free CO2(0-0.45mg/l), total dissolved solids (76.55-473mg/l), electrical conductivity (160.4-965mS/cm), total hardness (61-200mg/l), total alkalinity (34-141mg/l), salinity (0-0.5ppt), NO3-N (0.089-0.558mg/l), HPO4 -3(0.001-0.33mg/l), GPP (0.119-0.350gC/m3/h), NPP (0.028-0.306gC/m3/h) and RQ (0.017-0.286gC/m3/h) were observed throughout the study period and indicate that the water of the selected micro-watersheds remained congenical for fish growth except very high pH in a few water bodies. The phytoplankton counts in different micro-watersheds were ranged between 125 to 310 nos/l. Whereas; the counts of total zooplankton in different water bodies were very less, as such the zooplankton counts varied between 3 to 12Nos/l. On comparing different groups it was observed that Copepoda dominated the zooplanktonic counts followed by rotifera, cledocera and nauplii. The relationship between zooplankton, primary productivity and physico-chemical parameter were also calculated statistically. The present investigation also finds out the fish growth parameters net weight gainCatla(762.38- 1103.33gm), Rohu (628.31-932.16gm) and Mrigal395.15-838.29gm), net length gain Catla (18.59-30.03cm), Rohu (17.35-29.50cm) and Mrigal(9.77-28.23cm) and specific growth rate Catla(2.009-2.162%), Rohu(1.990-2.153%) and Mrigal(1.839-2.149%) and indicates the moderate productivity of the selected micro-watersheds. Further study is recommended to have better supplementary feeding and scientifically culture base fisheries for good results for fish production in micro-watersheds.ennullThesis