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The present study deals with the analysis of hydrochemical variables (pH, Temperature ,Dissolved oxygen , free carbon di-oxide, Hardness, Total Alkalinity, Calcium, Magnesium, Chloride and Nitrate) in relation to fish diversity from Jan.2011 to June. 2011 of fresh water reservoir Juggar dam, Hindaun City (Rajasthan) with the aim to create a reference data base for present and future ecological studies, socio-economic value and to support conservation and management strategies.
All the hydrochemical variables were found ideal for fishery and potability.Total 22 species of fishes from 04 orders and 08 families were recorded in the present study.The fish diversity was rich in major carps (Labeo rohita, Catla catla, Cirrhinus mrigala), minor carps {Labeo bata, Puntius puntius) and cat fishes (Mystus singhala, Mystus oar, Wallago attu, Ompakpabeda, Channa merulius and Channa noma). The fish production was found to be positively correlated with all the hydro-chemical properties of the water. Fish yield of juggar dam was 162.6 kg/hac.and conversion productivity to fish was 8.79%.. The study reveals that the water of reservoir is well suitable for fisheries, potable and irrigation purposes.
INTRODUCTION
India has a diversified fresh water resources including reservoirs lagoons, wet lands, rivers, ponds etc. found all over the country. The maximum fish production comes from rivers and culture based fisheries of the reservoirs. The reservoirs, ponds and lakes have an area 4.01 million hac. in India. Rajsthan is the largest state of India, covering an area 3,42,239 sq. Km. and is divided into four distinct physiographic divisions viz., the western desert, the aravalli hills, eastern plain and southeastern plateau. The average fish yield from various reservoirs of Raj asthan indicates that water bodies in this region are highly productive.
Climatic characteristics such as temperature, rainfall, photo period and rate of evapotranspiration directly or indirectly result in change of the chemical properties of the waterbody affecting the nutrient status, productivity and in turn the growth of the fish.
The juggar dam provides irrigation facilities in 5927 hectare (12971 Acre) land of 26 villages...