Volume : 2, Issue : 9, SEP 2016

SEASONAL VARIATIONS OF ZOOPLANKTONS IN VAIGAI RIVER, MADURAI DISTRICT, TAMILNADU

Dr.Vanitha.G

Abstract

Vaigai River is one of the largest Rivers in Tamil Nadu South India. The River maintains biological and ecological diversity. Vaigai River fosters high biological diversity, provides hydrological and ecological services and also supports livelihoods of a huge rural population. The nutrient rich physical environment support larvae and juvenile of many economically important species. It also acts as nursery grounds of commercially important fishes. The present paper deals with the diversity of zooplankton of the River Vaigai. The samples were collected from three sites at 11.30 am using plankton net and were analyzed monthly for the presence of zooplankton
by using Sedgwick-Rafter cell methods. Planktons were identified up to genus level. Totally 4 genera of zooplanktons and many larval forms were recorded from the sites studied. The present study provided information about the presence of four major groups of zooplanktons namely Rotifers, Copepods, Protozoa and Cladocerans. Many larval forms were also identified. Among the zooplanktons copepods were the most dominant group in all the sites studied. Zooplanktons are the major component of an aquatic ecosystem which gives strength and stability to the system.

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