Question

The most dominant species of Labeo in the river Cauvery is :

• A. Labeo dyocheilus
• B. Labeo boga
• C. Labeo kontius
• D. Labeo calbasu

Hint:

Labeo kontius is known as the "Cauvery carp". Its common name directly reflects its native association and dominance in the Cauvery River system.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The genus Labeo belongs to the family Cyprinidae and includes several species of freshwater carps.
Different river systems in India host distinct indigenous and endemic carps adapted to their unique flow rates, substrates, and water temperatures.
Detailed Explanation:
Labeo kontius, commonly known as the Cauvery carp or "Kontius", is a cyprinid species endemic to the Western Ghats and rivers of southern India, particularly the Cauvery River system.
- It is adapted to the fast-flowing, rocky stretches of the river.
- It is highly valued as a food fish by local communities and is easily distinguished by its upturned snout and fringed lips.
- While other species like Labeo calbasu (black rohu) and Labeo boga are found in peninsular rivers, they are not as specifically dominant or indigenous to the Cauvery system as Labeo kontius.
Therefore, Labeo kontius is the most characteristic and dominant native species of the genus Labeo in this river basin.

Step 2: Final Answer:
The most dominant species of Labeo in the Cauvery River is Labeo kontius.