摘要：Freshwater prawns are important in the capture and culture fisheries scene and are extensively distributed in freshwater and estuaries of the world mostly in tropical and sub tropical belts. A report on the prawn fishery of the perennial river Thamiraparani. The river Thamiraparani originates as Agastyamalai (Pothigai hills) on the eastern slopes of the western ghats at an altitude of 2000 M and it confluences with the Bay of Bengal at Gulf of Mannar after traversing a distance of 120 kms. Thamiraparani river has been considered as the second perennial river of Tamil Nadu. This river basin has been known to contain more potentials of freshwater prawns. Thamiraparani is the chief river of the Tirunelveli district which has a large network of tributaries. The seasonal availability of freshwater prawns were observed in four stations of Thamiraparani river basin. Environmental factors is an important, one which controls all the biological reactions of the aquatic organism. This basin rainfall is highly benefitted by the North-east monsoon (October to December). The availability of prawns is dependent only in and after monsoon periods. In this basin totally 8 species are collected. The present paper deals with the seasonal availability of the freshwater prawn is discussed.
