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Subject: Aquaculture × Author: Ghadai, Mrutyunjaya × End date: 2024 × Start date: 2020 × Type: Thesis ×
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    ThesisItemOpen Access
    Study of macrobenthic structure of Gaula river and fish ponds of tarai region, Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145, 2022-08) Ghadai, Mrutyunjaya; Trakroo, Malobica Das
    The Present study was done to evaluate the macrobenthic structure of Gaula river (29°16'18"N latitude and 79°32'51"E longitude) and fish ponds (29.01° N latitude, 79.3° E longitude) of Tarai region, Uttarakhand. The physico-chemical parameters of water and soil of these water bodies were analysed. Three different sites were selected in Gaula river named as S1, S2&S3. Likewise, three ponds were selected with three sampling sites each. Fortnightly samplings of water, soil and benthos were done. In Gaula river water temperature, DO, pH, conductivity, TDS, total alkalinity, free Co2, nitrate and phosphate varied from15.6-25°C,7.03- 9.19 mgl-1, 7.5-8.75, 204.65-299.55 μS cm-1, 146.9-187.6 mgl-1, 121.3-153.65 mgl-1, 0-1 mgl-1, 0.22-0.34 mgl-1, 0.042-0.071 mgl-1 respectively. In case of fish ponds water temperature, DO, pH, conductivity, TDS, total alkalinity, free Co2, nitrate and phosphate varied from 15.37- 31.17°C, 5.74-9.71 mgl-1, 7.13-8.68, 203.40-447.27μS cm-1, 200.61-290.46 mgl-1,117.42- 158.78 mgl-1, 0-1.17 mgl-1, 0.33-0.51 mgl-1, 0.015-0.048 mgl-1 respectively. Soil parameters of both the water bodies were analysed at the starting of the experiment and a week before the end of experiment. In Gaula river soil texture, soil pH, conductivity, organic carbon, organic matter varied from sand% 76.48-77.25, silt% 11.59-11.41, clay% 11.59-11.41,7.9- .4,285.3-343.1 μS cm-1,0.41-0.66%,0.71-1.14% respectively. Likewise, in fish ponds soil texture, soil pH, conductivity, organic carbon and organic matter varied from sand% 42.76-53.21, silt%31. 15- 41.34, clay%10.13-26.09%, 7.7-8.3, 298.83-328.87 μS cm-1, 2-2.6%,3.45-4.48% respectively. In Gaula river, population density varied from 25-100 ind/m2 and a total 4 species belonging to Malacostraca, Insecta and Gastropoda were recorded. Group wise distribution showed that insecta was dominant group in the taken stretch of Gaula river. Insecta was dominant group in Gaula river stretch. In case of fish ponds total 8 species belonging to Gastropoda, Bivalvia and Oligochaeta were recorded. The population density varied from 16.7-641.66 ind/m2.Groupwise distribution revealed that Gastropoda was the dominant group found in fish ponds. In case of Gaula river the Simpson’s index, Shannon Weiner index and Margalef’s index ranged from 0- 0 , 4 . 0 - 0 , 8 . 1 - 4 2 . 1 r e n i e W n o n n a h S , x e d n i s ’ n o s p m i S e h t s d n o p h s i f f o e s a c n I . y l e v i t c e p s e rindex and Margalef’s index ranged from 0.25-0.46, 0.42-0.79, 0.75-1.58 respectively. The study concludes that fish ponds are more diverse than the Gaula river in terms of availability of benthic macroinvertebrates.