Responses of thyroid activity to feed restriction in the goat.
A study of the effect of restriction of feed intake on the deiodination, faecal excretion, -distribution and secretion of thyroid hormones was carried out in a group of-eight young inale goats. ' In the control goats fed ad libitum no changes in the concentration of circulating thyroxine we...
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1977
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my.upm.eprints.268272024-08-05T23:51:41Z http://psasir.upm.edu.my/id/eprint/26827/ Responses of thyroid activity to feed restriction in the goat. Abdullah, Rasedee I.R., Falconer A study of the effect of restriction of feed intake on the deiodination, faecal excretion, -distribution and secretion of thyroid hormones was carried out in a group of-eight young inale goats. ' In the control goats fed ad libitum no changes in the concentration of circulating thyroxine were observed with increasing age -or body weight during the experimental period; however, an increase in thyroxine secretion rate per animal was apparent with increasing age or body weight of'the goats. In feed-restricted goats, no changes in the peripheral deiodination of [125I]thyroxine were observed, 'though significantly reduced faecal excretion of [125I]thyroxine was seen in goats' restricted to 50 or 20% of their ad libitum feed intake. Both thyroxine turnover rate and thyroxine distribution vollime were reduced by feed restriction. The secretion'rate of thyroxine was reduced to 45 % of the rate in ad libitum fed animals when feed intake was restricted to 20 %. Calculation 'of thyroxine secretion rate per kilogramo.75 body weight showed a highly significant correlation with feed intake. It was concluded that the marked reduction in thyroid activity occurring when feed restriction was imposed would be expected to cause a physiologically significant reduction in metaholic activity. CSIRO 1977 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/26827/1/BI9770207.pdf Abdullah, Rasedee and I.R., Falconer (1977) Responses of thyroid activity to feed restriction in the goat. Australian Journal of Biological Sciences, 30 (3). pp. 207-215. ISSN 0004-9417 English |
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A study of the effect of restriction of feed intake on the deiodination, faecal excretion, -distribution
and secretion of thyroid hormones was carried out in a group of-eight young inale goats. '
In the control goats fed ad libitum no changes in the concentration of circulating thyroxine were
observed with increasing age -or body weight during the experimental period; however, an increase
in thyroxine secretion rate per animal was apparent with increasing age or body weight of'the goats.
In feed-restricted goats, no changes in the peripheral deiodination of [125I]thyroxine were
observed, 'though significantly reduced faecal excretion of [125I]thyroxine was seen in goats' restricted
to 50 or 20% of their ad libitum feed intake. Both thyroxine turnover rate and thyroxine distribution
vollime were reduced by feed restriction. The secretion'rate of thyroxine was reduced to 45 % of the
rate in ad libitum fed animals when feed intake was restricted to 20 %. Calculation 'of thyroxine
secretion rate per kilogramo.75 body weight showed a highly significant correlation with feed intake.
It was concluded that the marked reduction in thyroid activity occurring when feed restriction
was imposed would be expected to cause a physiologically significant reduction in metaholic activity. |
format |
Article |
author |
Abdullah, Rasedee I.R., Falconer |
spellingShingle |
Abdullah, Rasedee I.R., Falconer Responses of thyroid activity to feed restriction in the goat. |
author_facet |
Abdullah, Rasedee I.R., Falconer |
author_sort |
Abdullah, Rasedee |
title |
Responses of thyroid activity to feed restriction in the goat. |
title_short |
Responses of thyroid activity to feed restriction in the goat. |
title_full |
Responses of thyroid activity to feed restriction in the goat. |
title_fullStr |
Responses of thyroid activity to feed restriction in the goat. |
title_full_unstemmed |
Responses of thyroid activity to feed restriction in the goat. |
title_sort |
responses of thyroid activity to feed restriction in the goat. |
publisher |
CSIRO |
publishDate |
1977 |
url |
http://psasir.upm.edu.my/id/eprint/26827/1/BI9770207.pdf http://psasir.upm.edu.my/id/eprint/26827/ |
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1806690462610751488 |
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13.188404 |