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Author: Mehta, Pragya × Start date: 2021 × Rating Count: 5 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Evaluation and quantification of fish food organisms and aquatic weeds of Ottu reservoir in Haryana
    (CCSHAU, Hisar, 2021-09) Mehta, Pragya; Gajender Singh
    The study was carried out in Ottu reservoir which is situated in Sirsa city of Haryana, India. Evaluation and quantification of fish food organisms and aquatic weeds of Ottu reservoir were monitored from March 2021 to June 2021. The evaluation of the planktonic population revealed that there were 36 genera of plankton recorded. Out of this 19 genera of phytoplankton belongs to class Bacillariophyceae (3 genera), Cyanophyceae (3 genera), Chlorophyceae (11 genera), Euglenophyceae (2 genera) and 17 genera of zooplankton belongs to class Copepoda (9 genera), Rotifera (2 genera), Cladocera (4 genera), and Protozoa (2 genera). In various months maximum, 123 species of phytoplankton were observed in site 2 and site 4 and Chlorophyceae found as dominant group while in zooplankton in various month site 4 showed maximum 391species of zooplankton and Cladocera group found as the dominant group. The highest quantity of plankton was observed in April while the minimum quantity was observed in March. Shannon and Weaver's diversity index for plankton found maximum in site 1(3.35) and minimum in site 4 (3.25). In site 1 and site 2 significant difference (P<0.05) was observed for the phytoplanktons groups present every month from March to June. However, a non-significant difference was observed in site 3 and site 4.Whilst the zooplankton group present in site 1, site 2, site 3, and site 4 from March to June was also found significant. A total of 7 species of aquatic weeds recorded 4species (Eicchornia crassipes, Lamnea minor, Pistia stratiotes and Nympahea alba) belongs to free floating aquatic weeds, 2 species (Ceratophyllum demersum , Hydrilla verticelleta) belongs to submerged aquatic weeds and 1 species (Typha latifolia) belongs to Emergent aquatic weeds. A total of 17 benthic species of benthos identified belongs to 2 phylum viz. annelida (3 species) and mollusca (14 species) and in mollusca 2 class viz. gastropoda and bivalve recorded. Maximum benthic fauna recorded in June.