Vitamin requirements of finfish and prawns

Vitamins are complex organic substances, usually of comparatively small molecular size (molecular weight usually less than 1000). They are distributed in feedstuffs in small quantities and form a distinct entity from other major and minor food components (Cho et a_l., 1985). The importance of vitamins as essential constituents in the diets of animals came to light in the early part of this century and during the past five decades active and rapid progress in vitamin research was made almost in all the coMmercially important specie

Feed ingredients available in India and their potential nutritional value

Development of practical feed formulations depend upon information on two major aspects; the nutritional requirements of the animals and the nutritive value of the potential feed ingredients. Once information on these aspects along with other essential parameters, become available for a specific species and size, it should be possible to develop low-cost practical feeds using linear programming. During the past two decades there has been a phenomenal increase in research activities relating to identification of raw materials for formulating feed ingredients both in the developed and developing nations of the world

Development of artificial feeds for finfishes

successful fish culture depends upon provision of diets coritaining an appropriate balance of essential nutrients and adequate level of energy to permit the most efficient growth of fish. Application of modern techniques, with very high production potentials, demands supply of nutritionally balanced complete feeds in intensive sys-tems and suppLemental feeds in semi-intensive system

Nutrition in aquaculture - An overview

Aquaculture is gaining more and more importance as a means to augment finfish and shellfish production in both the developed and developing countries of the world, to partially meet the growing demand for fish and shellfish protein. It has been predicated by TAG (1973) that by the year 2000, aquaculture could produce at least 50 million tons of animal protein, if certain research and development measures are undertaken, as against the production of 6 million tons of fish and shellfish through culture in 1975 (Pillay, 1976)

Fish nutrition and climate change. In: Winter School on Impact of Climate Change on Indian Marine Fisheries held at CMFRI, Cochin 18.1.2008 to 7.2.2008

Fish production, whether in the natural or captive aquatic ecosystems, largely depends on a reliable supply of nutritious food preferred by the different life-stages of a species and congenial environmental conditions that stimulate optimum intake, digestion and utilization of the food. Fish being ectotherms their survival, growth and reproduction are greatly influenced by changes in water temperature besides synergetic effect of several other physico-chemical factors prevailing in the aquatic environment. In this article, an attempt is made to highlight the basic nutritional needs of marine, and freshwater fish, and the likely impacts of climate change, especially the role of temperature on intake and utilization of food nutrients by fish

Histological alterations in the hepatopancreas of Penaeus monodon Fabricius (1798) given aflatoxin B1-incorporated diets

Aflatoxin is a toxic contaminant produced by toxigenic fungi of the genus Aspergillus during the processing and storage of feeds and feed ingredients. Aflatoxins can cause abnormalities such as poor growth, physiological imbalances and histological changes that result in a reduction in the yield and profitability of shrimp culture. Histological changes in Penaeus monodon sub-adults fed different doses of aflatoxin B1 were studied. The doses of aflatoxin B1 administered in the diets were 50, 100, 150, 500, 1000 and 2000 ppb. At the end of the fourth and the eighth weeks of the experiment, the shrimps were sampled and the cephalothorax was observed for histological changes. Significant changes were observed in the different treatment groups at the fourth and eighth weeks. The severity of pathological changes was proportional to the increase in the concentration of aflatoxin fed to the shrimps. Histological changes in the hepatopancreas were loss of structure of the cells and tubules, nodule formation, cell elongation, desquamation, rounding of cells, fibrosis, necrosis, haemocytic infiltration and cellular inflammation

Mycotoxins in feeds and their impact on fish and shrimp - Winter school on recent advances in diagnosis and management of diseases in mariculture, 7th to 27th November 2002, Course Manual

Mycotoxins are a group of ubiquitous chemical compounds, widely diverse in their structures and toxic effects, produced by a variety of fungi. The name mycotoxin combines the Greek word for fungus 'mykes' and the Latin word 'toxicum' meaning poison

Methods in sugar analysis

Procedure for determination of total sugars in molasses is give

An ultrastructural study of the Hepatopancreas of Indian white prawn Penaeus indicus H. Milne Edwards

Electron microscopic studies of the hepatopancrcatic tubule revealed four distinct cell type . The Embryonic cells were undifferentiated with a large nucleus and cytoplasm surrounding it. Golgi complex and free ribosomes wcre abundant. Fibrillar (F-cells) contained extensive rough endoplasmic reticulum with ribosome - studded cisternae. The golgi cisternae were always dilated with numerous zymogen grnnules. Secretory (B-cel1s) showed many vesicles and a large vacuol

मत्स्यपालन व्यवसाय में पोषक के क्षय को धटाने की रणनीति

कृपया पूरा लेखा पढ