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Category Archives for "Fisheries Biology"

Lateral Line System of Fishes

A specialized organ or structure, such as the eye, ear, tongue, nose, or skin, in which a large number of sensory neurons are concentrated and which acts as a receptor component, is called a sensory organ. It is also called the recipient organ. Sensory organs receive physical or chemical stimuli from the environment. The dermal […]

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Osteichthyes: Characteristics, Classification and Examples

Osteicethyes is the largest class of superclasses Pisces under the subphylum Vertebrata (phylum: chordata). True bony fish belong to this category. They originated in the early Silurian period and in the middle of the Devonian period there was a massive adaptive dispersion between them. Among the vertebrates, the largest variety exists in bony fishes. Scientists […]

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Tilapia: Physical Description, Habitat, Reproduction and Economic Importance

Tilapia (Oreochromis mossambicus) belongs to the family Cichlidae under order Perciformes of class Actinopterygii. The English names are Tilapia, Mozambique Cichlid, Mozambique Tilapia, Java Tilapia, Miracle Fish (Indonesia).  It is native to inland and coastal waters in southeastern Africa, from the Zambezi basin in Mozambique, Malawi, Zambia and Zimbabwe to Bushman river in the province […]

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Fish Scales: Types, Development and Functions

Scales are  small plate-shaped dermal or epidermal structures that are found in the outer skeletons of fish, reptiles, or some mammals. The skeletons of many vertebrates are covered by two types of scales, namely epidermal and dermal. Epidermal scales originate from the malpighian layer of the epidermis. Such scales are found in terrestrial vertebrates such […]

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Amino Acid Requirements of Fish

The unit of protein formation is the amino acid.  23 types of amino acids have been isolated from natural proteins. 10 of them are essential for fish. Animals cannot make essential amino acids. So these have to be taken with food. The quality of food depends not only on the amount of nutrients, but also […]

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Carbohydrate Requirements of Fish

Carbohydrates are a large organic group that contains glucose, starch and cellulose. Its common feature is that it contains only carbon, hydrogen, and oxygen, and their combustion produces carbon dioxide and one or more molecules of water. The simplest carbohydrates are the three carbons that play an important role in metabolism at the secondary level. […]

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Lipid Requirements of Fish

Lipids are high-energy nutrients that are used in fish farming as a partial alternative to protein. It provides almost twice as much energy as protein and carbohydrates. It is an important component of the diet because it is rich in fat-soluble vitamins and essential fatty acids. Lipids work with proteins as important components of the […]

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Mineral Requirements of Fish

Minerals are a type of basic elements. Mineral elements are the inorganic elements that are required for the management and maintenance of important physiological processes in the organism. Some important minerals are  Calcium, Phosphorus, Sodium, Sulfur etc. Minerals act as biological catalysts for enzymes, hormones and protein in the body.About 23 types of inorganic minerals […]

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