SEASONAL VARIATION IN WATER QUALITY AND PHYTOPLANKTON PRODUCTION IN JOHILA RESERVOIR, LALPUR, AMARKANTAK (M.P.)

Present study has been undertaken in order to assemble knowledge regarding physicochemical parameters analysis from June 2021 – May 2022 in relation to the abundance, composition and seasonal variation in the phytoplankton of Johila reservoir Lalpur Podki, Amarkantak (M.P.). It is interiorly located at Latitude 22046'20, Longitude, 81044'39'' in Lalpur and no study regarding hydrobiology in general and phytoplankton abundance in particular has yet not been conducted. Johila reservoir has its origin from Jwaleshwar temple kund of Amarkantak, hill located in Makel velly. It starts flowing opposite site to the Narmada River after 15 Kilometre and finally joins the river Sone at Dasrathghat of Umaria District of Madhya Pradesh. Total area of Johila reservoir is 86 hectare (216 acers). Since no study yet has been done on phytoplankton production in relation to its physico-chemical characteristic hence present study has been undertaken. Phytoplankton population were dominated by Chlorophyceae, Myxophyceae and Bacillariophyceae in decreasing order. Chlorophyceae members revealed dominance over Myxophyceae and Bacillariophyceae.

ALTERATIONS IN UNITS OF CENTRAL DOGMA UNDER ARSENIC EXPOSURE DURING PREPARATORY PHASE OF TESTICULAR CYCLE OF Mystus (M.) vittatus (Bl.)

Central dogma units comprise of DNA, RNA and synthesis of protein. Reproductive cycle in ?shes is always dynamic and the units of central dogma are always changing in different phases of testicular and ovarian cycle which constitute reproductive cycle in ?shes. The adult specimens of Mystus (M.) vittatus, a tropical siluroid, when exposed for 30 days to sublethal concentration of trivalent arsenic (11.24 mg/l) revealed signi?cant decline in DNA, RNA and consequently protein in the ovary of Mystus (M.) vittatus during its preparatory phase of Testicular cycle. However, 15 days exposure revealed less signi?cant alterations. Causes for declining in various units of central dogma and consequently protein synthesis is discussed in this paper

ARSENIC INDUCED ALTERATIONS IN GLYCOGEN AND LIPID DURING TESTICULAR CYCLE OF A FRESHWATER SILUROID, MYSTUS (M.) VITTATUS (BL.)

The increasing order in the glycogen and lipid content was observed during preparatory and spawning phase but decrease in these biochemical parameters was during post-spawning phase of testicular cycle in Mystus (M.) vittatus, a freshwater siluroid. Less signi?cant alteration in glycogen and lipid was noticed after 15 days of exposure but highly signi?cant decrease was observed after 30 days of exposure in SLC (Sublethal concentration) of trivalent arsenic as AsCl3. causes for decline in these biochemical parameters have been discussed.