Note on the Effects of Selenium on Wool Growth and Body Gains in Sheep

Slen, S. B.; Demiruren, A. S.; Smith, A D

doi:10.4141/cjas61-034

Cited by 13 publications

(4 citation statements)

References 6 publications

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“…Clinical signs of Se deficiency are often manifested as nutritional myopathy (i.e., white muscle disease) but can also result in production losses in subclinical instances. Marginal (subclinical) Se deficiencies can result in decreased growth performance, loss of milk yield, decreased reproductive performance, and reduced wool production but can be remedied with Se supplementation (Slen et al, 1961;Gabbedy, 1971;McDonald, 1975;Suttle, 2010). Selenium dietary recommendations are 0.5 mg/kg of live weight gain, and this amount is divided by the absorption coefficient (NRC, 2007).…”

Section: Serum Sementioning

confidence: 99%

Blood serum mineral element concentrations of weaned Montana ram lambs and their relationship with water quality characteristics

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Murphy

Emon

et al. 2018

The Professional Animal Scientist

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Clinical and subclinical trace mineral deficiencies can limit productivity in western sheep production systems. The objective of this research was to determine the proportion of ranches that supplemented with trace minerals and to quantify serum trace mineral concentrations in ram lambs after weaning across Montana with particular emphasis on Se and Zn. Serum samples (n = 214) were collected from ram lambs 8 to 10 mo of age (52.8 ± 16 kg) at 21 ranches throughout Montana and analyzed for Co, Cu, Fe, Mn, Mo, Se, and Zn. Ranches were classified as deficient, marginally deficient, adequate, or excessive by flock mean serum trace mineral concentrations. Additionally, water samples were analyzed for pertinent characteristics. The median and interquartile range of serum concentrations for each trace mineral across ranches were as follows: Co (0.41 ng/mL; 0.90 ng/mL), Cu (0.79 μg/mL; 0.24 μg/mL), Fe (153 μg/dL; 52 μg/dL), Mn (1.70 ng/mL; 0.80 ng/mL), Mo (15.3 ng/mL; 19.3 ng/mL), Se (115 ng/ mL; 97.5 ng/mL), and Zn (0.70 μg/mL, 0.19 μg/mL). Of ranches surveyed, 67% provided a trace mineral supplement. Ranches that provided supplementary trace mineral had greater serum Se concentrations (P < 0.001). The 2 most commonly deficient and marginally deficient minerals across Montana were Se (19% of ranches deficient; 23.8% of ranches marginally deficient) and Zn (9.5% of ranches deficient; 57.1% of ranches marginally deficient). Regionally, Se serum samples classified as deficient were all located in western Montana. Of ranches sampled, 40 and 35% of water samples exceeded upper desired concentrations for Na and sulfates, respectively.

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Section: Serum Sementioning

confidence: 99%

Blood serum mineral element concentrations of weaned Montana ram lambs and their relationship with water quality characteristics

Page

Murphy

Emon

et al. 2018

The Professional Animal Scientist

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“…indicated that staple length and fibre diameter were increased by Se supplementation Slen et al (1961). also obtained increases in staple length and fibre diameter, whereas Hill ef a1 (1969) obtained increases in staple length only.…”

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confidence: 89%

Effect of Selenium on Wool Production, Body Weight and Mortality of Young Sheep in Western Australia

Bj¹

1971

Aust Veterinary J

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Summary The effect of regular selenium supplementation on the body weight, wool production and mortality of young Merino sheep was investigated. Groups of Se‐treated and control sheep involving from 260–500 on each of 15 farms were observed from six weeks to 19 months of age. Ten mg Se as sodium hydrogen selenite was administered orally to the treated sheep at two‐monthly intervals. Treated and control sheep grazed together throughout the trial period. Statistically significant responses to selenium were recorded in body weight gains on four farms, in decreased mortality on five farms and as an increase in fleece weight on eight farms. The response in fleece weight varied from 2.9‐7.6% and could not be explained as a result of increased body weight. The increase in fleece weight was not due to an increase of grease in the wool but appeared to be due to an increase in fibre diameter and to a lesser extent an increase in staple length. A statistically significant decrease in the incidence of tender fleeces as a result of selenium supplementation was also recorded. All farms on which responses to selenium were obtained were in areas with average annual rainfall more than 20 inches. On two farms selenium caused statistically significant depressions in the parameters measured. Both farms were in areas with less than 20 inches average annual rainfall.

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“…Sien et al (1961) observed over a 2-year period that selenium given to range ewes significantly increased body weight gain and ap peared to increase wool growth as well. Hopkins et al (1964) reported that selenium given to lambs moderated the incidence of nutritional muscular dystrophy and resulted in Jolly (1960) and Hartley (1961) reported that selenium treated calves gained up to 50% faster than untreated controls.…”

Section: Discussionmentioning

confidence: 95%

“…Re sponses were noted in flocks where no cases of muscular dys trophy had been reported as well as in affected flocks. Sien et al (1961) observed the effect of selenium on body weight gain and wool growth. Range ewes receiving daily doses of selenium in a 2 year study gained significantly faster and produced more wool than control animals.…”

Section: Sheepmentioning

confidence: 99%

Selenium and sulfur nutrition of beef cattle

Shively

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Note on the Effects of Selenium on Wool Growth and Body Gains in Sheep

Abstract: not available

Cited by 13 publications

References 6 publications

Blood serum mineral element concentrations of weaned Montana ram lambs and their relationship with water quality characteristics

Blood serum mineral element concentrations of weaned Montana ram lambs and their relationship with water quality characteristics

Effect of Selenium on Wool Production, Body Weight and Mortality of Young Sheep in Western Australia

Selenium and sulfur nutrition of beef cattle

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