Abstract

The Trans-Himalayan landscape is a high elevation land. The area is characterized by extreme cold, low precipitation and rugged terrain of mountains. Biodiversity is the variety and variability of all forms of life on earth that plays a great role in human existence. This includes diversity within species, between species and of ecosystems. The exploration of Rakchham-Chhitkul Wildlife Sanctuary present in the Baspa (Sangla) valley situated in remote tribal district of Kinnaur in Himachal Pradesh, formed by the two of world’s greatest mountain ranges namely Great Himalayan range and Dhauladhar ranges in India revealed the presence of 2 species of fish belonging to 2 genera, 1 families and 1 order. It was noticed that both species of fish were exotic species which were introduced in India in early twentieth century from European countries.

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