Distribution and Conservation Status of Ichthyospecies in Rivers Dhalai and Haora in the Eastern Himalayan Biodiversity Hotspot Region of Tripura Province in the of Northeast India: Recent Detailed Taxonomic Study

Fish faunal exploration at different study points in River Dhalai in Ambasa district of Tripura revealed the occurrence of ,15 species of fishes belonging to 14 genera, 5 Sub-families, 9 Families and 5 Orders were recorded during the first reconnaissance survey on 3 November 2007; and, 2 species of fishes under 1 Genus, 1 Family and 1 Order during the second survey on 19 February 2012.In other words, on an overall scenario,15 species of fishes belonging to 14 genera, 5 Sub-families, 9 Families and 5 Orders were recorded from River Dhalai in Tripura.On the other hand, River Haora in Tripura, revealed the occurrence of 7 species of fishes belonging to 6 genera, 3 Sub-families, 4 Families and 1 Order during the first reconnaissance survey conducted on 13 4 1999.Further, 2 species of fishes belonging to 2 Genera, 1 Sub-family, 2 Families and 2 Orders were recorded during the second survey conducted in the river on 25 10 2005.In other words, on an overall consideration, 9 species of fishes belonging to 8 genera, 4 Sub-families, 5 Families and 2 Orders were recorded from River Haora in Tripura.Still Further, on a larger holistic overall basis, 23 Species of fishes belonging to 21 Genera, 6 Sub-families, 12 Families and 5 Orders have been recorded from both the rivers Dhalai and Haora when these two rivers are considered together and, considering all collections done from them on different dates and different collection sites