Robust and Inexpensive Metabolism Cages for Sheep

Michell, A.R.

doi:10.1016/s0007-1935(17)32891-9

Cited by 5 publications

(3 citation statements)

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“…Eighteen Scottish Blackface ewes (average weight around 60 kg), previously accustomed to periods in metabolism cages of the type described by Michell (1979), were reintroduced to cages and allowed to acclimatize for one week. The basal diet comprised 0 5 kg oats, 0 3 kg straw and 0-2 kg bran, (Michell, 1989), the basal sodium intake (0 5 mmol kg-') was nutritionally generous, let alone adequate.…”

Section: Methodsmentioning

confidence: 99%

“…Three experiments are described: (1) some physiological comparisons on basal sodium intakes (phase I); (2) a comparison of the response to low sodium intake (phase II); (3) a comparison of the response to sodium loading (phase III). METHODS Eighteen Scottish Blackface ewes (average weight around 60 kg), previously accustomed to periods in metabolism cages of the type described by Michell (1979), were reintroduced to cages and allowed to acclimatize for one week. The basal diet comprised 0 5 kg oats, 0 3 kg straw and 0-2 kg bran, together with a 31 g mineral-vitamin supplement which provided 25 mmol Na+ day-'.…”

Section: Introductionmentioning

confidence: 99%

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Differences between sheep excreting sodium predominantly in their urine or in their faeces: the effect of changes in sodium intake

Michell¹,

Moss²

1992

Experimental Physiology

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SUMMARYSheep receiving a total of about 31 mmol day-1 (0-5 mmol kg-') of sodium were classified according to the predominant route of sodium excretion; urinary (U) or faecal (F). U sheep had a greater water turnover than F sheep; their intake was 41 % higher and they produced 133 % more urine but there was little difference in faecal water loss. Most faecal sodium was readily exchangeable with water in both groups. When sodium intake was reduced by 80 % (to 6 mmol day-1; 0'1 mmol kg-'), the reduction in total sodium excretion was equally effective in F sheep and U sheep after 48 h and after 2 weeks the overall losses of sodium were smaller in F sheep. On sodium intakes close to requirement (0-1 mmol kg-' or less) the majority of the sheep excreted most of their sodium in faeces and did so on intakes up to 0 5 mmol kg-' day-'.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Differences between sheep excreting sodium predominantly in their urine or in their faeces: the effect of changes in sodium intake

Michell¹,

Moss²

1992

Experimental Physiology

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“…The aim was to see whether the treatment would mimic the effects of oestrus on fluid and electrolyte excretion. METHODS Six mature Finnish Landrace ewes weighing approximately 60 kg were ovariectomized and maintained in metabolism cages (Michell, 1979b) for several months before the experiments began. Their main food was chaffed hay containing 45 mmol/kg of sodium and 470 mmol/kg of potassium.…”

Section: Introductionmentioning

confidence: 99%

Fluid and Electrolyte Excretion in Sheep: Comparison of the Effect of Reduced Food and Water Intake With Oestrus

Michell

1981

Exp Physiol

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SUMMARYFood and water intake were restricted by 29% for 48 h in ovariectomized ewes, to see whether such changes could cause a pattern of water and electrolyte excretion similar to that observed during the oestrous cycle. The closest resemblance appeared in the effect on water balance and there was also a rise in sodium excretion, as at oestrus. Restriction of intake failed to duplicate the marked sodium retention or, more particularly, the persistent potassium retention which follow natural oestrus. Restriction of food alone produced changes less similar to those seen at oestrus, mainly because this treatment caused a large increase in urine output. The similarity between the effects of restriction and 'fasting natriuresis' is discussed, with particular reference to the mildness of the stimulus in these experiments. Indications that the gut may be as important as the kidney in the regulation of salt and water balance are discussed in relation to other herbivores and to man.

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The effect of pregnancy and sodium intake on water and electrolyte balance in sheep

Michell

Moss

Hill

et al. 1988

British Veterinary Journal

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Robust and Inexpensive Metabolism Cages for Sheep

Cited by 5 publications

References 1 publication

Differences between sheep excreting sodium predominantly in their urine or in their faeces: the effect of changes in sodium intake

Differences between sheep excreting sodium predominantly in their urine or in their faeces: the effect of changes in sodium intake

Fluid and Electrolyte Excretion in Sheep: Comparison of the Effect of Reduced Food and Water Intake With Oestrus

The effect of pregnancy and sodium intake on water and electrolyte balance in sheep

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