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...
| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
| Published: |
CSIRO
1977
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| Online Access: | http://psasir.upm.edu.my/id/eprint/26827/ http://psasir.upm.edu.my/id/eprint/26827/1/BI9770207.pdf |
| _version_ | 1848845682901778432 |
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| author | Abdullah, Rasedee I.R., Falconer |
| author_facet | Abdullah, Rasedee I.R., Falconer |
| author_sort | Abdullah, Rasedee |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T08:50:42Z |
| format | Article |
| id | upm-26827 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T08:50:42Z |
| publishDate | 1977 |
| publisher | CSIRO |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-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 |
| spellingShingle | Abdullah, Rasedee I.R., Falconer Responses of thyroid activity to feed restriction in the goat. |
| title | 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_short | Responses of thyroid activity to feed restriction in the goat. |
| title_sort | responses of thyroid activity to feed restriction in the goat. |
| url | http://psasir.upm.edu.my/id/eprint/26827/ http://psasir.upm.edu.my/id/eprint/26827/1/BI9770207.pdf |