of which have contributed to a high degree of eutrophication. The non potability of the water body is indicated by the high degree of faecal contamination with organisms that produce H2S that may include forms of Salmonella, Proteus, Citrobacter and some strains of Klebsiella. The distribution pattern of plank tonic forms, for the decade ending 2001, as per laboratory tests of lake's water samples provides the values of parameters such as the Chlorococcales, Desmids, Diatoms, Blue-greens and Euglenoids, as the biological indicators of water body, as given in table below which testify to the lake's eutrophication status. The numbers indicate the microorganisms present in the sample per litre. Utility of algal biomass Scientists have reported that exploitation of polluted waters which are rich in algal biomass for biotechnological products could be a feasible proposition and that the Phycobiliproteins from algae could be used as sensitive fluorescent dye, as immunochemical reagent and also as efficient fluorochromes in multiple colour analysis. Bird watching The lake was once a big attraction to bird watchers. According to naturalists, about 176 species of birds (a large number of them migratory birds, including birds from Siberia) with 10,000 to 15,000 of them visited the lake during winter to roost. Organised bird watching expeditions around the lake used to be actively pursued by the Mysore Amateur Naturalists (MAN) Association. In recent years, with the lake getting into a eutrophic state (though since restored), the number of birds visiting the lake has substantially decreased. Now, the number of birds visiting the lake has reduced to about 2,000. They are found to breed in the isolated bird island. The birds now found in the lake (some of the birds are pictured in the gallery) are spot-billed pelicans, little cormorant, painted storks, openbill storks, Eurasian spoonbills, black-crowned night herons and Oriental darters. BirdLife International has included Kukkarahalli Lake in the list of 38 important Important Bird Areas (IBAs) in the State of Karnataka. Lake restoration During the year 2003–2004, with grants of about US$0.2 million (Rs 91 lakhs) provided by the Asian Development Bank, Karnataka Urban Infrastructure Development Corporation (KUIDFC) in association with the University of Mysore under whose jurisdiction the Lake falls and citizens groups, carried out the restoration works of the lake. In order to effectively reduce the external loading of pollutants and the intervention of wastes into the lake ecosystem the measures implemented have covered the following