Biodiversity of Zooplankton and its importance for fish production on Majalgaon Dam reservoir District Beed, Maharashtra, India
Authors: Ingole Sitaram B
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Majalgaon Dam was constructed on the River Sindphana which is a tributary of River Godavari, in Beed District (Maharashtra, India) in 1987.The River Sindphana has been under constant threat of pollution by sewage and industrial wastes, disposal of dead bodies, deforestration, excessive useof fertilizers and pesticides, bathing and water development programmes. The dam has a catchment area is 3840 sq. km. It is of great Importance for the region because its water is used for human and cattle consumption, power generation, fish production and irrigation. A total of 33 species of phytoplanktons, 29 species of zooplanktons and 11 species of fishes were identified. The importance of plankton in fisheries is well established. It has been clearly demonstrated that the zooplankton constitute the only food for the fish fry and the adult fish not only eat them, but also select them as a delectable item.Thus zooplankton have a direct bearing in the fish industry. In India, several studies were conducted in reservoirs elucidating the characteristics of zooplankton.The zooplankton peak was found during summer followed by winter and rainy season.Microfauna (zooplankton) was observed about four groups as Rotifera observed about eleventh species, Copepoda observed about nine species, Cladocera observed seven species and Ostracoda observed about two species. The macro fauna or fish fauna were observed at the Majalgaon Dam reservoir. There are culture of fish with quick growing varieties of fishes including Indian Major Carps, exotic species have been popular in recent time. There is abundance of the species such as Labeo rohita, Cirrhina mrigal, Catla catla, Cyprinus carpio, Silver carp, Wallago atta, Mystacenbelus armatus, Notoptemus chital, Puntues ticto, Channa staitus, Mystus seenghala, Mystus cavaassius, Eutroplus suratensis, Belon concila, Chela, Tilapia Mossambica, Rohtee alfrediana, Gobius giuris, etc. Fish is economically a very important group of animals be side being used as food. Fish liver is an important source of oil containing Vitamins A and D, several minerals and protein.