Journal of Aquaculture Research & Development

Diversity of Zooplankton in Shanigaram Reservoir, Siddipet District, Telangana, India

Jagadeeshwara Chari T^*, Srishylam B and Rajashekhar AV Department of Fisheries, Government Degree & PG College, (A) Siddipet District, Telangana, India
^*Correspondence: Jagadeeshwara Chari T, Department of Fisheries, Government Degree & PG College, India, Tel: +9440039243, Email:

Received: 13-Mar-2021 Published: 30-Apr-2021

Introduction

Zooplanktons form a major link in the energy transfer at secondary level in aquatic food webs between autotrophies and heterotrophy [1]. In addition they act as indicator of water of pollution. The zooplankton occupies an intermediate position in the food web in the aquatic ecosystem. of the total Rotifer count worldwide in 2030 only 360 species have been reported from India. The number of Cladocera species reported in India is 190 [2]. The global diversity of Cladocera is more than 600 species. The Copepods have the longest and the strongest appendages which help them to swim faster than any other zooplankton. They are very sensitive to environmental changes and thus are of considerable potential value as water quality indicating [3]. Zooplanktons provide the main food for fishes and can be used as indicators of the tropic status of a water body. Zooplankton has long been used as indicators of the eutrophication [4].

Materials and Methods

In the present study we carried out of zooplankton and their seasonal variation during the year May 2017-June 2018. Water samples of were collected in different stations of the lake during an early hours of the day 7.00 A.M-10.00 A.M. The plankton net is made by the bolting nylon silk (No. 25 Mesh size 50 μ) is used for collection of zooplankton and which is conical shape and reducing con with the bottle t its end. Collected samples were transected to labeled samples were containing 4% formalin. Collected samples were brought by using various authenticated monographs. After an accurate identification of ach genus, the density of zooplankton was calculated as per the Lackey Drop method.

The density of zooplankton was expressed as organisms per liter using formula:

N = n × v/V

N=Total no of organisms/Liter of water filtered.

n=No of organisms counted in 1 ml of sample.

v=Volume of concentrated sample (ml).

V=Volume of total water filtered/Liter (ml).

Results and Discussion

The present study report the zooplankton diversity community of Shanigaram reservoir. In the investigation period fifteen zooplankton were identified in this species of which Six of Rotifer four species of Cladocera Three species of Copepoda and two species of Ostracoda were identified. During the present investigation class Rotifer was dominated among the entire zooplankton group in all the research showed in Table 1.

Table 1: Seasonal distribution of zooplankton in Shaniagaram reservoir.

Rotifers are regarded as bioindicators of water quality. Rotifers plays vital role in the tropic tiers of freshwater impoundments and serve as living capsule of nutrition [5]. In the present study they dominated with six species as compared to other groups of zooplankton. Taxonomic dominance has been reported in several water bodies [6]. This pattern is common in lakes, ponds, reservoirs and rivers [7]. Since the Rotifers have short reproductive stages they increase in abundance rapidly under favorable environmental conditions. The Rotifer group population shows highest during the pre-monsoon season, lowest during the post monsoon season. The similar observations were given by Sharma [8].

Cladocerans are popularly known as water fleas as most of them move through the water with a series of hops and jumps. Cladocerous prefer to live deep water and constitute a major item of food for fish. The Cladocera group population shows highest during the pre-monsoon season, lowest during the post monsoon season. Zooplanktons are highly sensitive to environmental variation [9].

Free living Copepods are an essential link in the food chain occupying the intermediate tropic level between bacteria and algae n hand and small and large plankton predators on the other. Through they are well known as important intermediate hosts for helminthes parasites. The copepod group population shows highest during the pre-monsoon season, lowest during monsoon season. Similar observations were given by Kamble and Meshram [10].

Ostracoda commonly known as seed shrimps are small crustaceans having the bivalve carapace enclosing the laterally compressed body? They are found in a wide variety of aquatic habitats lakes, ponds, streams, swamps and especially shallow places; here weeds or algae are abundant. Majority of them are free living and a few are commensalisms on the gills of crayfishes and in the intestine of fishes and amphibians. The Ostracoda group population shows highest during the post monsoon season, lowest during the monsoon season (Figure 1).

Figure 1: Seasonal average variation of zooplankton during the year 2017-2018.

Conclusion

In the present study, the zooplankton population of Shanigaram reservoir was observed that, the quantity of zooplankton found more during pre-monsoon season. The Rotifers were dominated among the population during pre-monsoon. The Ostracoda were comparatively in low profile in annul cycle.

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