STUDY ON ICHTHYOFAUNAL DIVERSITY IN RELATION TO PHYSICO-CHEMICAL PARAMETERS OF MANAKONDUR FRESH WATER LAKE OF KARIMNAGAR DISTRICT,

Freshwater bodies are one of the most common and stable habitats of biosphere. The freshwater habitats have their own physico-chemical and biological characters which are subjected to modify by local conditions and physiographic features. The water quality parameters have a great influence on the growth and other factors of aquatic organisms. Therefore, the lentic water body gives a good source for fisheries. The present investigation deals with limnological and physico-chemical parameters and their influence on Ichthyofauna abundance in Manakondur fresh water Lake at Karimnagar District, Telangana State. The study was carried out for a period of one year i.e., from June, 2020 to May, 2021.The investigation was focused on the determination of hydro-chemical parameters such as Water

Freshwater bodies are one of the most common and stable habitats of biosphere. The freshwater habitats have their own physico-chemical and biological characters which are subjected to modify by local conditions and physiographic features. The water quality parameters have a great influence on the growth and other factors of aquatic organisms. Therefore, the lentic water body gives a good source for fisheries. The present investigation deals with limnological and physico-chemical parameters and their influence on Ichthyofauna abundance in Manakondur fresh water Lake at Karimnagar District, Telangana State. The study was carried out for a period of one year i.e., from June, 2020 to May, 2021.The investigation was focused on the determination of hydro-chemical parameters such as Water temperature(19.0-31.0 º C),Transparency(18.50-44.30cm),TDS(200-350mg/l),PH(7.5-8.3),DO(5.2-12.0mg/l),Co 2 (3.0-9.2mg/l),TH(110-210mg/l),TA(165-300mg/l),CL(35.00-50.20mg/l),Po 4 (0.02-0.16mg/l),No 3 (0.02-0.14mg/l) and BOD(2.5-7.0mg/l).The study was made to recorded fish fauna available. Total 33 species of fishes were collected and identified during the study period which belongs to 6 orders, 12 families and 18 genera. The order Cypriniformes was dominant with 15 species, followed by Siluriformes (8 species), Osteoglosiformes(2 species), Perciformes(4 species), Channiformes(3 species), Perciformes(4 species) and Antherniformes(1 species) were identified. Order wise percentage composition is Cypriniformes (17%), Siluroformes (34%), (Osteoglossiformes(8%), Perciformes (25%), Channiformes (8%), Anthrniformes (8%) In the light of recent literature, the data has been discussed and it is concluded that limnological and physico-chemical parameters in this reservoir are most comply with suitability of human consumption and favourable for fishery. In the light of recent literature, the data has been discussed and it is concluded that limnological and physico-chemical parameters in this reservoir are most comply with suitability of human consumption and favourable for fishery.

ISSN: 2320-5407
Int. J. Adv. Res. 9 (12), 654-660 655 Introduction:-Pisces are the major group of vertebrates which shows an enormous diversity in shape, size, biology and habitat (Bobdey, 2014).The aquatic ecosystem is important and it has large number of economically fish which is an important source of food. Fishes are the important vertebrate group of animal's world contributing to the biodiversity of animals. Primarily fishes are used as a food source. Many vital vitamins and fatty acids are found in fishes so sometimes it is referred by doctors as a food source. Freshwater resources are used for various purposes, like agricultural, industrial, household, recreational, environmental activities etc. Reservoirs and the main resources exploited for inland fisheries and understanding the fish faunal diversity is a major aspect for its development and the sustainability management. Lakes in India support rich variety of fish species, which intern support the commercial exploitation of the fisheries potential (Krishna and Piska, 2006). Ichthyodiversity refers to variety of fish species; depending on context and scale, it could refer to alleles or genotypes within fish population to species of life forms within a fish community and to species or life forms within a fish community and to species of life forms across aqua regimes (Burton et al., 1992).India is one of the mega biodiversity countries in the world and occupies the ninth position in terms of freshwater mega biodiversity ( Menon,1992).However ,there are still a large number of habitats/regions for which the Ichthyofaunal diversity is still to be reported. The present investigation was under taken to study the aquatic vertebrate animals with reference to fishes from Manakondur Lake.

Material and Methods:-Study Area:
Pedda cheruvu is located in Manakondur village, Karimnagar district, Telangana. This lake is located in longitude79⁰13'30"E and latitude 18⁰23'53"N. Physical and chemical parameters had been expected within the laboratory by means of preferred techniques prescribed by using APHA (1985), Trivedy & Goel(1984).During the study period of one year from June 2020 to May 2021.Water Temperature, Transparency, Total Dissolved Solids, PH, Dissolved Solids, Carbon Di Oxide, Total Hardness, Total Alkalinity, Chlorides, Phosphates and Nitrates were determined.
The fish samples were also collected every month during the study period for which the help of the local fishermen. The collected fish species were preserved in 10% formalin and subsequently identified following work of Dutta and Srivastava (1988), Jhingran 1982,Jayaram 1999.Identified fish species was presented in (Table No-2).

Results And Discussion:-
The water samples were analyzed and the data presented in Table-1.The fish fauna identified were presented in Table-2 and in which 33 fish species have been identified.
The present study physic-chemical parameters data reveals that, the water temperature ranges from 19.0⁰C to 31.0⁰C is within the permissible limit of most of cultivable fishes. In the present study transparency ranges from 18.50cm to 44.30cm.In the present study TDS ranges from 200(mg/l) to 350(mg/l).The pH ranged from 7.5 to 8.3. While pH range more than 9.0 is unsuitable for fish growth (Swingle, 1967).The DO content in water is most important parameter in water quality assessment and reflects the physical and biological process prevailing water quality. High DO content is an indication of healthy system in a water body Bilgrami (1979); Fakruzzaman.M (1996). The present study In the present study DO ranges from 5.2(mg/l) to 12.0(mg/l).In the present study CO2 ranges from 3.0(mg/l) to 9.2(mg/l).In the present study Total Hardness ranges from 110(mg/l) to 210(mg/l).In the present study Total Alkalinity ranges from 165(mg/l) to 300(mg/l).In the present study Chlorides ranges from 35.00(mg/l) to 50.20(mg/l).In the present study Phosphates ranges from 0.02(mg/l) to 0.16(mg/l).In the present study Nitrates ranges from 0.02(mg/l) to 0.14(mg/l).In the present study BOD ranges from 2.5(mg/l) to 7.0(mg/l) similar observations by Patki Soroj.S(2002). Various physico-chemical factors in the lake play an important role for augmenting the fish distribution and their yield capacity. Therefore, it is necessary to determine the dynamic effects of environmental factors on fish growth (Sugunan et al., 2000). The environmental variability also strongly influences the fish population. Many phyciso-chemical parameters of water have been implicated in the initiation of maturational and reproductive events in some fishes.

Conclusion:-
In the present study, the physico chemical parameters values of manakondur lake water are within the permissible limits as per prescribed standards. It can also be stated that the productivity of it may be concluded that the lake is found more suitable for fish culture. The lake has largest catchment area. Hence, this lake water can be utilized for the fish productive in large scale and variety of species can be cultural. Finally it appears that the Manakondur fresh water lake is rich in fish diversity and a good potential for conservation of fish germplasm.