tailieunhanh - Selenium deficiency, toxicity and its requirement in marine fish: A research review

The necessity of selenium (Se) in maintaining normal growth and physiological functions have been demonstrated in fish due to its important role as a cofactor in glutathione peroxidase enzyme (GPx), protecting cell membranes against oxidative damage. The deficiency of Se can lead to reduced growth, feed utilisation and health status in farmed fish. | Journal of Fisheries science and Technology No. 4 - 2018 SELENIUM DEFICIENCY, TOXICITY AND ITS REQUIREMENT IN MARINE FISH: A RESEARCH REVIEW Pham Duc Hung¹ Received: ; Revised: ; Accepted: ABSTRACT The necessity of selenium (Se) in maintaining normal growth and physiological functions have been demonstrated in fish due to its important role as a cofactor in glutathione peroxidase enzyme (GPx), protecting cell membranes against oxidative damage. The deficiency of Se can lead to reduced growth, feed utilisation and health status in farmed fish. Whereas fish fed elevated dietary Se levels results in reduced feed utilisation and adverse effects on physiological performance and impaired histology. Dietary Se requirements have been quantified for some marine fish species with varied results, probably due to the differences in bioavailability, sources of Se, protein ingredients as well as the interaction of Se with other nutrients in the diets. Besides, due to the narrow gap between deficiency, optimality and toxicity of Se level, it is imperative to find out the exact dietary Se requirement for any aquatic species. This review summarises the available information regarding dietary Se requirements in marine fish. The effects of Se deficiency and its toxicity in marine fish also are discussed. Keywords: selenium, marine fish, toxicity, requirement I. Introduction The nutritional effects of selenium (Se) have gained attention due to its essential roles in growth and physiological functions (Watanabe et al., 1997). It serves as a cofactor in glutathione peroxidase-catalysed reactions, which are necessary for the conversion of hydrogen peroxide and fatty acid hydroperoxides into water and fatty acid alcohol by using reduced glutathione (GSH), thereby protecting cell membranes against oxidative damage. A deficiency of Se can cause negative effects on growth, feed utilisation and survival in many marine fish such as grouper Epinephelus malabaricus, cobia

• Ngư nghiệp
• Marine fish
• Selenium deficiency
• Glutathione peroxidase enzyme
• Farmed fish
• Protecting cell membranes
• Against oxidative damage
• Assessment the cost
• Return in marine fish production
• Marine fish production
• Fishery sector
• Caught in selected harbors
• kinds of marine fish farming techniques
• feeding fish
• freshwater fish
• aquariums
• freshwater aquarium
• tips for raising fish
• ornamental fish breeding
• Development of fish descaling machine
• Fish descaling machine
• Post harvest processing of fish
• Marine fisheries
• Fish food forms
• Fish fauna
• Marine habitats
• Cu Lao Cham Hoi an biosphere reserve
• World biosphere reserve
• Characteristics of fish fauna
• Summary of Biological Thesis
• Hepatic necrosis disease in marine fish
• Vaccine against nephrotic
• Mutant strains of bacteria
• Prevention of nephrotic disease in fish
• Marine sponges
• Bioactive compounds
• Fish and shellfish pathogens
• Casein starch peptone yeast extract
• Analysis of morphological
• Chemosensory systems
• Marine fishes
• Olfaction provides fish
• Hierarchical position
• Vietnamese fish
• Digenean diversity
• Reef fishes in Khanh Hoa province
• Coral reef
• Number and size of the reef fish collected
• Digenea species on coral reef fish
• WWFs mission is to conserve
• Aquaculture in general
• fish farming in particular
• during the writing
• The report looks into
• The report is a wake up
• storage and fish processing
• aquaculture projects
• all kinds of marine life
• ways of cooking shrimp
• shrimp farming techniques
• water quality management
• the waste management measures
• Journal of Marine Science and Technology
• The accuracy of fish otolith analysis
• Some validation methods
• Length frequency modes
• Validating the first growth increment
• BMC Genomics
• Atlantic salmon
• Marine ingredients
• Terrestrial ingredients
• Liver transcriptome
• Marine eutrophication and the Baltic Sea
• Eutrophication of the Gulf of Finlan
• Changes in fi sh communities in the Baltic Sea
• Marine species
• Migratory species
• Freshwater species
• Tạp chí Khoa học
• Tạp chí sinh học
• Công nghệ sinh học
• Vietnams fauna
• Biological Resources
• Electrochemical Oxidation
• Toxic Organics
• Waste Water
• Impact of Sewage
• Sewage and Industrial
• Effluents on Soil
• chính sách kinh tế
• dự án nông nghiệp
• kỹ thuật nông lâm
• trồng trọt chăn nuôi
• kinh doanh nông nghiệp
• support and pressures
• government mandates
• Premature and Sick Newborn
• Long Term Effects
• Breastfeeding
• Breastfeeding and Infant Growth
• Journal of Zoology
• Turkish marine waters
• Plastic pollution
• Trachurus mediterraneus
• Mullus barbatus barbatus
• BMC Genetics
• Ctenolabrus rupestris
• Marker validation
• Population genomics
• Marine fish populations