Vitamin D3 and Its Metabolites Have No Role in Calcium and Phosphorus Metabolism in Tilapia mossambica.

Rao, Devara Sunita; Raghuramulu, N.

doi:10.3177/jnsv.45.9

Cited by 20 publications

(12 citation statements)

References 24 publications

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“…The vitamin D endocrine system plays a crucial role in calcium and phosphorus handling during parr-smolt transformation in Atlantic salmon (Salmo salar) (Lock et al, 2007). However, Rao and Raghuramulu (1999) reported that vitamin D 3 probably played no role in Ca or P metabolism in tilapia (Oreochromis spp.). Gross morphology of the vertebrae of Atlantic salmon was not observed to be influenced by dietary vitamin D 3 (Graff et al, 2002), and no toxic effect was detected in channel catfish (Lovell and Li, 1978) and Atlantic salmon (Graff et al, 2002) when fed mega doses of vitamin D 3 .…”

Section: Tablementioning

confidence: 98%

The effects of concurrent supplementation of dietary phytase, citric acid and vitamin D3 on growth and mineral utilization in juvenile yellow catfish Pelteobagrus fulvidraco

et al. 2015

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Section: Tablementioning

confidence: 98%

The effects of concurrent supplementation of dietary phytase, citric acid and vitamin D3 on growth and mineral utilization in juvenile yellow catfish Pelteobagrus fulvidraco

et al. 2015

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“…Vitamin D 3 has been shown to be essential for optimal growth in tilapia hybrids (Shiau & Hwang 1993) and blue tilapia (O'Connell & Gatlin 1994). The primary role of vitamin D 3 is to improve calcium intestinal absorption in terrestrial animals, however, its effects on Ca and P bone mineralization in tilapia have been contradictory (Shiau & Hwang 1993;O'Connell & Gatlin 1994;Rao & Raghuramulu 1999). In long term studies, dietary vitamin D 3 significantly increased calcium bone levels in a dose-dependent manner for tilapia hybrids (Shiau & Hwang 1993), however, this was not demonstrated with blue tilapia (O'Connell & Gatlin 1994).…”

Section: Vitamin and Mineral Requirements Of Tilapiamentioning

confidence: 99%

A review of the nutrition and feeding management of farmed tilapia throughout the culture cycle

Romano

2013

Reviews in Aquaculture

220

130

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Tilapia is the second most farmed fish group worldwide and over the past decade has quadrupled in production, largely due to their many characteristics conducive to aquaculture conditions as well as to the high marketability and relatively stable market prices. To keep pace with this rapid expansion, tilapia aquaculture will rely increasingly on more sustainable practices, but this must not be at the expense of decreased productivity, increased cost or compromised product quality. Since feed constitutes the major operating cost of tilapia farming, understanding their nutritional requirements, factors that may influence these requirements and implementing the most appropriate feeding management strategy is essential for the continued sustainability and scalability of the global tilapia industry. This review addressed these concerns by providing an overview of published nutrient requirement data and offered practical recommendations to the nutrition and feeding management of farmed tilapia, from broodstock to finishing feeds. The first section of this review extensively discusses the dietary protein/amino acids, lipids/fatty acids, carbohydrates, vitamin and mineral requirements of tilapia. Alternatives to marine-based ingredients, which are used increasingly in tilapia feeds, are also discussed. This is followed by discussing practical feed management aspects at the commercial farm level including feed formulations, feed types and feeding rates/frequency throughout the culture cycle. Recent research indicating significant differences in nutrient requirements and utilization efficiencies of improved tilapia strains versus non-improved strains are highlighted. This review aims to provide a comprehensive overview of tilapia nutrition and thus contributes to the continued global expansion of tilapia farming and the demand for their products.

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“…When a continuous and virtually inexhaustible supply of calcium and phosphorus is ensured by the aquatic environment, fish may not require vitamin D for the regulation of these minerals. Apart from this, the calcemic hormone PTH is absent in fish, and this seems to have developed very much later after fish in the evolution process (12 of fish and their calcemic/phosphatemic status (19-21) moreover, the administration of vitamin D/metabolites shows no effect on known parameters in fish dependent on vitamin D (22). Thus it appears that vitamin D may not have a role in the calcium and phosphorus regulation in fish.…”

mentioning

confidence: 93%

“…Vitamin D metabolism in fish Vitamin D must have entered fish accidentally through a diet that had plenty of it (18), and it does not seem to have any known physiological function (22) in a calcium-phosphorus-rich aquatic environment. Thus this may be a needless compound that was present in the diet and that entered the fish that way.…”

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confidence: 99%

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Is Vitamin D Redundant in an Aquatic Habitat?

Rao

Raghuramulu

1999

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

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SummaryCertain fish are very rich sources of vitamin D as compared to most of the higher vertebrates which have insignificant amounts of this vitamin. Not only the teleosts, which possess a calcified skeleton, but also the elasmobranchs, which lack calcified skeleton, contain extremely high concentrations of this vitamin, leading to the speculation that the function of vitamin D in fish may be different from its known classical functions in terrestrial animals. Interestingly, the two most common calcemic hormones associated with Ca and P homeostasis in higher vertebrates are either missing [parathyroid hormone (PTH)] or inactive [calcitonin (CT)] in fish. In fact, these hormones appear to have developed after transition of life from water (Ca-P rich environment) to land (environment poor in Ca and P). Thus, living in an aquatic environment with a continuous rich supply of Ca and P, do fish need vitamin D? If so, does it need to be converted to its polar forms? Additionally what are the functions of vitamin D and its metabolites in fish? Since fish stand between the invertebrates and higher vertebrates in evolution, they serve as a unique model for the study of the evolutionary and physiological significance of vitamin D. Investigations have demonstrated that the source of a high amount of vitamin D in them is primarily through their food-chain (plankton). In addition, it appears from the studies in fish that vitamin D perhaps had no physiological function in the calcium-rich aquatic environment, and its metabolism was essentially for catabolic purposes. During the course of evolution, when life started on calcium poor terrestrial environment, vitamin D became functional and its metabolism, an anabolic one, was concerned with calcium homeostasis. Key Words fish, calcium, evolution, metabolism, vitamin D Calcium homeostasisNature has in a way ensured that calcium and vitamin D are inextricably interlinked. Vitamin D, as it is understood today, carries out the policing job of regulating serum calcium levels in highly evolved mammals. And this regulating mechanism is done with astounding efficiency.

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Vitamin D3 and Its Metabolites Have No Role in Calcium and Phosphorus Metabolism in Tilapia mossambica.

Cited by 20 publications

References 24 publications

The effects of concurrent supplementation of dietary phytase, citric acid and vitamin D3 on growth and mineral utilization in juvenile yellow catfish Pelteobagrus fulvidraco

The effects of concurrent supplementation of dietary phytase, citric acid and vitamin D3 on growth and mineral utilization in juvenile yellow catfish Pelteobagrus fulvidraco

A review of the nutrition and feeding management of farmed tilapia throughout the culture cycle

Is Vitamin D Redundant in an Aquatic Habitat?

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