In this article we will discuss about:- 1. Origin of Rohu Fish 2. Systematic Position 3. Distribution 4. Economic Importance. Origin of Rohu Fish: Class Osteichthyes (Gr., osteon = bone + ichthyes = fish) includes the ray-finned "bony fishes", both marine (e.g., cod, sole, herring, eels) and freshwater. Subclass Actinopterygii of class Osteichthyes are the commonest vertebrates of today. Its [...]
In this article we will discuss about the nervous system of rohu fish (Labeo rohita) with the help of suitable diagrams. Brain: The brain of Labeo, though in general not unlike that of elasmobranchs, is very different in detail and specialised. The cerebellum is very large. Its anterior part does not bulge outward. Instead it pushes forwards under the roof [...]
In Labeo, respiration is aquatic, occurring with the help of gills. Respiratory Organs: In Labeo, there are four pairs of gills present in the branchial chambers covered by operculum. Each gill has a double row of gill-filaments or branchial-filaments supported by gill-arch. Each gill filament bears numerous minute transverse lamellae covered with thin epithelium. These lamellae contain capillaries of afferent [...]