The biological selenium status of livestock in Britain as indicated by sheep erythrocyte glutathione peroxidase activity

Anderson, Peter H.; Berrett, Sylvia; Patterson, D.S.P.

doi:10.1136/vr.104.11.235

Cited by 56 publications

(13 citation statements)

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“…No statistically significant relation was found between the blood glutathione peroxidase activities of Anderson et al (1979) and the selenium concentration of grain and conserved herbage from the same farms given here, but both studies point to the need to consider selenium supplements for grazing animals and those given only feeds grown on the farm.…”

Section: Se Concentration Of Grain and Herbagecontrasting

confidence: 60%

“…Also a survey of glutathione peroxidase values of the blood of sheep on farms in England, Scotland and Wales showed that a high proportion had a low selenium status, as indicated by low enzyme activity (Anderson, Berrett & Patterson, 1979). The selenium concentration of feeds grown on a number of the same farms in England and Wales as those from which Anderson et al (1979) obtain blood samples, was determined. These are reported here, together with values for a range of specific herbage species.…”

Section: Introductionmentioning

confidence: 99%

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The selenium concentration of cereal grain and conserved and fresh herbage from farms in England and Wales

Heys

Hill

1984

J. Agric. Sci.

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The selenium concentration of cereal grain and herbage from 131 farms in England and Wales was, in general, low: the proportions of samples with values below 0-03 mg/ kg D.M. were 60 % for grain (primarily barley, from 96 farms) and 39 % for conserved herbage (primarily hay, from 131 farms). Values for fresh herbage from 12 farms were similar to those for conserved herbage. There were no significant differences in selenium concentration among herbage species. For all samples, those from the Cambridge area contained more selenium than those from other parts of England and Wales.

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Section: Se Concentration Of Grain and Herbagecontrasting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

The selenium concentration of cereal grain and conserved and fresh herbage from farms in England and Wales

Heys

Hill

1984

J. Agric. Sci.

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“…0.019) mmol/l. Reference values for blood Se concentrations include: ,1.52 mmol/l (Stowe and Herdt, 1992), ,1.00 mmol/l (Puls, 1994), ,0.95 mmol/l (Anderson et al, 1979), and for lamb blood Se concentrations ,0.13 mmol/l Grace and Knowles, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Selenium deficiencies have been reported in soils, herbages and consequently in livestock blood concentrations in USA (Van Metre and Callan, 2001), Australia (Tinggi, 2003), New Zealand (Watkinson, 1983) and also within the UK (Blaxter, 1963;Anderson et al, 1979;Wang et al, 1987) and Ireland (Mee et al, 1994). In Northern Ireland in particular, McMurray and Rice (1982) have reported the Se status of livestock to be highly deficient with 85% of beef herds being below the threshold of what is considered adequate.…”

Section: Introductionmentioning

confidence: 99%

Nutritional status of adult ewes during early and mid-pregnancy. 2. Effects of supplementation with selenised yeast on ewe reproduction and offspring performance to weaning

Muñoz

Carson

McCoy

et al. 2008

Animal

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The objective of this study was to determine the effects of selenium (Se) supplementation of mature ewes in the period from day 214 to day 90 post mating on Se status, productivity and viability of ewes and their offspring. Multiparous crossbred ewes (n 5 82) were randomly assigned to receive a standard dried grass-based diet (control) or dried grass diet supplemented with 1 g of selenised yeast (Selplex R ), providing 0.5 mg Se per ewe per day. After day 90 post mating, all ewes were offered grassbased diets supplemented with a standard multivitamin and mineral mix, up to lambing. Ewes that were fed additional Se had increased (P , 0.001) activity of glutathione peroxidase enzyme (GPx) and increased plasma Se concentrations throughout the treatment period. At lambing, GPx activity of supplemented ewes was higher (P , 0.001) than that of controls. Twenty-four hours after birth, lambs of ewes given Se had higher (P , 0.001) concentration of Se in plasma, greater (P , 0.001) activity of GPx and better (P , 0.01) immune status. Lambs of ewes that received supplementation showed a faster progression to stand than control lambs (P , 0.05), independent of maternal behaviour which was not affected. Supplementation reduced perinatal lamb mortality (0.04 v. 0.17; P , 0.05). However, overall mortality from birth to weaning was unaffected (P . 0.05). Supplemented ewes weaned lambs on average 2 kg heavier than control ewes, due to the higher (P , 0.05) growth rates achieved by their offspring. In conclusion, for ewes with a marginal Se status, an organic source of Se supplemented throughout pregnancy, compared with supplementation only in the last trimester, positively affected measures of lamb viability and survival.

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“…37,000 samples over 30,000, or 95 per cent, are from the north-east; Sinclair, 1987: personal communication) and in Veterinary Investigation Service surveys for endemic elemental deficiencies (e.g. Anderson et al, 1979). National farm revenues are declining, and English cereal farmers show an increasing interest in rearing sheep, the principal land product in the west (Buxton, 1986).…”

Section: The Islands and Highlands In Lawmentioning

confidence: 97%

Use of the countryside by the urban state: Scotland's North‐West seaboard and islands

Kaye

1990

Scottish Geographical Magazine

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This paper addresses the themes and sources of conflict and ambivalence over rural and agricultural policy planning in the north-west of Scotland. It outlines the context of the present conservation debate, identifying conflicts which arise out of various polarities between people who use the landscape: rural against urban, Highlander against Anglo-Scot, Londoner against provincial, part-time farmers against economists focused on full-time agriculture. These conflicts occur within a legal and political framework which skews access to power toward the urban and southern elite. This dominant group perceives the north-west Highlands as a peripheral, and therefore naturally subject, area.Environmental conservation is a new factor in what was an historically-based problem. Conservationists are not fully integrated into any one group, but may become part of the dominant power-structure. Evidence is presented to show the skewed structure of dominance over land use in the north-west Highlands, and to show how conservation is seen to fit in that structure. Generally, it is concluded that in order to conserve the environment, the traditional patterns of dominance may have to be reversed and the area redefined as a centre rather than as a periphery.

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The biological selenium status of livestock in Britain as indicated by sheep erythrocyte glutathione peroxidase activity

Cited by 56 publications

References 0 publications

The selenium concentration of cereal grain and conserved and fresh herbage from farms in England and Wales

The selenium concentration of cereal grain and conserved and fresh herbage from farms in England and Wales

Nutritional status of adult ewes during early and mid-pregnancy. 2. Effects of supplementation with selenised yeast on ewe reproduction and offspring performance to weaning

Use of the countryside by the urban state: Scotland's North‐West seaboard and islands

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