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A survey on the species diversity and water quality parameters of selected site in Vembanad Lake

The status of fin fish and shell fish diversity were investigated in the Vembenad Lake in the proposed study area includes Chandhi Resort, Chungam, Pallathuruthy, Vattakayal and Aaru Block. A total of 28 species were identified in which the Shannon Wiener diversity index (H’) values were found to be on higher side and varied from 0.6548 to 2.311. Simpson Dominance index was shown a maximum of 0.8876 (site 1) and minimum of 0.2466 (site 2). There were signs of decline of the Vembanad fishery resources, evident in the lesser number of species and decline of fishery production. It shows that the difference of 72% was shown in between site 5 and site 2 when compared with others. While the similarity index shows that site 5 and site 2 are much comparable to the extent of difference of 8 %. There is 40% difference were noted between site 4 and with site 3 and 1. The difference of 16% was observed between site 3 and site 1 in the present study. Representation of water quality parameters were also analyzed showed an average salinity during the study period was 11.95 ppt and dissolved oxygen was 4 mg/ml.


Yadu Krishnan, June Mary Josy, Namitha Paul, Shiya Biju, Jithu Paul Jacob

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