Fishes of the Towkak River: with special emphasis on the habitat requirements

Fishes occur wherever water of reasonable integrity exists, from deep sea depths exceeding 8,000 m to mountain lakes above 5,000 m altitude. The biodiversity, of the Towkak River shows an interesting trend in regards to habitat requirements. The Geomorphology of the river basin and different habitat requirements parameters also reveals that the distribution of the fishes along the river course. The study results total of 96 species of fishes under, 57 genera belonging to 24 families and 10 orders. The Habitat Suitability Index (HIS), also results that, water quality of the Towkak River have optimum carrying species capacity At the same time, the increased population and environmental degradation have caused damage to this biodiversity. This damage could be severe and may result in loss of genetic diversity, populations and eventually to the extinction of species.