Inland Fisheries

7.1.4 Categorization of fish species according to temperature tolerance

On the basic of temperature tolerance, the cold water fish categorized as eurythermal (having broad temperature tolerance range) and stenothermal (having narrow temperature tolerance range).

Eurythermal species:  Schizothorax richardsonii, Barilius bendelisis

Stenothermal species: Brown trout (Salmo truta fario)

                                       Eastern brook trout (Salvelines fontinalis)

                                       Tibetian snow trout (Diptychus maculates)

These stenothermal species tolerate only a narrow range of temperature up to freezing point of water

Thermal limits

          Snow trout – 5 to 25º C

          Mahaseer – 10 to 30º C

          Exotic trout – 4 to 20º C