Selenium review in dromedary camels (Camelus dromedarius) : selenium status, GSH-Px activity, hai and organs distribution and excretion
Camel has developed a whole of remarkable physiological, biological and metabolic peculiarities to survive into the desert constraints, which are not supported by other ruminants. Trace mineral particularly selenium requirement in camels are not known. Camel selenium supplementation is a common practice to facing several cardiomyopathy often attributed to the selenium deficiency. Nowadays the use of selenium in animal foodstuff is well implicated and needs a further investigation of its metabolism (ingestion, dynamic of storage-destocking, excretion) in camel species. According to previous comparative study on the basis of serum selenium concentration, it appears that the camel showed a different metabolic profile compared to cow, from which the concept of our present study was held with the objective to explore the selenium metabolism (serum selenium levels, glutathione peroxidase activity (GSH-Px), organs and hair distribution, urinary, faecal excretion) of supplemented camels with inorganic form (sodium selenite). This study carry out (i) the potential variations factors (sex, age, breed and the physiological status) on selenium level of non supplemented camels, (ii) effect of Se supplementation (0,2 and 4 mg/day) on serum Se status of non pregnant and non lactating camels, (iii) the effect of moderate Se supplementation (0 and 2 mg/day) on pregnant camels at the last stage of pregnancy, lactation period and on new bom (up to 3 months), (iv) tolerance of young camels to Se supplementation. These studies lead to recommendations practice in terms of complementation in camel which proves its relative sensitivity to excess Se intake at lower levels compared to cattle. The maximal tolerable dose is 8 mg and the recommended dose is ranged between 2 and 4 mg. (Texte intégral)
| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | eng |
| Published: |
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| Subjects: | L51 - Physiologie animale - Nutrition, L52 - Physiologie animale - Croissance et développement, dromadaire, Camelus dromedarius, http://aims.fao.org/aos/agrovoc/c_10467, http://aims.fao.org/aos/agrovoc/c_5a453ce9, |
| Online Access: | http://agritrop.cirad.fr/550993/ http://agritrop.cirad.fr/550993/1/ID550993.pdf |
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| Summary: | Camel has developed a whole of remarkable physiological, biological and metabolic peculiarities to survive into the desert constraints, which are not supported by other ruminants. Trace mineral particularly selenium requirement in camels are not known. Camel selenium supplementation is a common practice to facing several cardiomyopathy often attributed to the selenium deficiency. Nowadays the use of selenium in animal foodstuff is well implicated and needs a further investigation of its metabolism (ingestion, dynamic of storage-destocking, excretion) in camel species. According to previous comparative study on the basis of serum selenium concentration, it appears that the camel showed a different metabolic profile compared to cow, from which the concept of our present study was held with the objective to explore the selenium metabolism (serum selenium levels, glutathione peroxidase activity (GSH-Px), organs and hair distribution, urinary, faecal excretion) of supplemented camels with inorganic form (sodium selenite). This study carry out (i) the potential variations factors (sex, age, breed and the physiological status) on selenium level of non supplemented camels, (ii) effect of Se supplementation (0,2 and 4 mg/day) on serum Se status of non pregnant and non lactating camels, (iii) the effect of moderate Se supplementation (0 and 2 mg/day) on pregnant camels at the last stage of pregnancy, lactation period and on new bom (up to 3 months), (iv) tolerance of young camels to Se supplementation. These studies lead to recommendations practice in terms of complementation in camel which proves its relative sensitivity to excess Se intake at lower levels compared to cattle. The maximal tolerable dose is 8 mg and the recommended dose is ranged between 2 and 4 mg. (Texte intégral) |
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