The nutritional value of food depends not only on its chemical composition but also on the amount of nutrients or energy. Digestion is the fraction of nutrients or energy in swallowed food that is not excreted in the feces. Digestibility determines the amount of digestion and the relative measure of how much food and nutrients … Read more
The nervous system of Rohu fish (Labeo rohita) is divided into the following three parts: A. Central nervous system B. Peripheral nervous system and C. Autonomic nervous system. A. Central Nervous System The central nervous system is made up of the brain and spinal cord. The brain of the Rohu fish is divided into three … Read more
Leishmania donovani is a protozoan parasite which belongs to the family Trypanosomatidae under the phylum Euglenozoa. It is an obligate parasite which requires a host for completing their life cycle. It is responsible for the disease, known as leishmaniasis. Over 50 species belong to genus Leishmania were described worldwide; among them about 20 species are … Read more
The system through which blood circulates in different organs and parts of the body is called Blood Circulatory System. The presence of well-developed circulatory system can be observed in almost all animals with few exceptions. Fish have a closed type of blood circulatory system. Food, oxygen and waste products are transported from one part of … Read more
The number of living fish species is over 26,400 which is 51.9% of almost all vertebrates. Like other vertebrates, fish have an unequal abundance and diversity. Their ancestors were widespread 500 million years ago. They spread through a massive time-wide evolution and had the opportunity to originate and become extinct in major phyletic streams, even … Read more
Teleost is a diverse group of ray-finned fishes which belongs to largest infraclass Teleostei under the class Actinopterygii. The group teleost includes 40 orders and 448 families with over 26000 species. They are the most advanced fish among the bony fishes. The world`s important sport and commercial fishes include this group. The length of the … Read more