Category: Aquaculture | Fish feed | Freshwater

Maize in fish feed: in context of Bangladesh

Maize (called vutta in Bengali) is one of the emerging crops in Bangladesh, is being cultivated for long time; though still is being considered as minor crops. Price, demand and supply of maize are increasing worldwide. Bangladesh has a great potentiality to increase the maize cultivation due to its soil and climate suitability. Due to the huge demand for poultry feed, people and government of Bangladesh paid attention to grow …read more

Category: Aquaculture | Fry and Brood | Hatchery | Resource | Trade

Brood banks in Bangladesh

In general, brood bank is a place (hatchery or farm) where brood fishes are available. Under the project “Establishment of the brood bank” by government of Bangladesh, two brood banks were established in each division of the country where quality broods can be found. In these brood banks, brood fishes are produced from natural spawns and distributed to other government and non-government hatcheries at minimum costs.

List of brood banks, …read more

Category: Fish feed | Non-fishes | Resource

Duck weeds in Bangladesh

Duck weed: Lemna minor

Duck weed: Lemna minor

Duck weeds are the group of floating plants belonging to the genera Lemna, Azolla and Wolffia (Singh and Mittal, 1999). But Das (1997) mentioned Lemna, Spirodela, Wolffia and Wolffiella genus as duck weeds. So far, a total of 34 species of duck weeds …read more

Category: Aquaculture | Freshwater | Hatchery

Nursery management of Labeo calbasu at Raipur Fish Hatchery, Laxmipur

Sampling

Sampling

The Labeo calbasu (Hamilton, 1822) is a threatened fish species (present status: Endangered) in Bangladesh due to the loss of habitats (IUCN Bangladesh, 2000). Successful artificial or induced breeding can be a good option to conserve this species. However, nursing of new born fry is an important step in …read more

Category: Aquaculture | Fish Disease and Health

Fish pox: a skin disease of fishes

Fish pox, or carp pox, is one of the oldest known diseases of fish, recorded as early as 1563. Fish pox is a chronic skin disease that occurs among several species of propagated cyprinids. It is also called carp pox, epithelioma papillosum, and papillosum cyprini.

Etiology: The etiological agent, of this disease is Herpesvirus cyprini which was first reported by B. Hofer in 1904.

Character:

Icosahedral DNA virus with …read more

Category: Aquaculture | Fish Disease and Health

VHS: a vesceroptropic disease of young fishes

An acute to chronic vesceroptropic disease of young (fingerling to yearling) rainbow trout at 100C or lower. Also in adult trouts and salmonids, but not usual.

Etiology: VHSV (Viral Haemorrhagic Septicemia Virus)

Viral characteristics:

Bullet-shaped rhabdovirus, enveloped. Length- 180 nm, width- 70-85 nm, apical end rounded, other end flat. ss RNA, replication in cytoplasm. Sensitive to lipid solvents, detergents and proteolytic enzymes.

Distribution:

Trouts farms in European countries: Denmark, …read more

Category: Aquaculture | Fish Disease and Health

Vibriosis: an enzootic disease of fishes

Definition: Vibriosis is an enzootic disease of fish, recorded from all over the world. It is almost exclusively caused by halophilic vibrios of the species Vibrio anguillarum and rarely by Vibrio parahaemolyticus. It occurs among various fish species, predominantly in marine and brackish waters, and occasionally in fresh water. First described as red pest disease of eels. Now described as hemorrhagic lesions on the body surface of many marine fishes.

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