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 skeleton of rohu fish (Labeo rohita) with the help of suitable diagrams. Exoskeleton: Exoskeleton of Rohu Fish (Labeo rohita) comprises scales and fin-rays. Scales are cycloid type which are thin overlapping bony plates, partly covered by skin. Centrally each scale has an area called focus. Around focus there are concentric rows of [...]
Digestive system includes the alimentary canal and the associated digestive glands. Alimentary Canal: The alimentary canal is a long tube comprising mouth, buccal cavity, pharynx, oesophagus, stomach, intestine and rectum. 1. Mouth: The mouth is a sub-terminal crescentic slit bounded by fleshy upper and lower lips. These lips bear four or five rows of conical papillae. 2. Buccal Cavity: The [...]