Manganese nutrition in rat and swine reproduction
Experiments were conducted with littermate gilts maintained in stainless steel metabolism cages within environmentally controlled rooms and consuming a corn-soybean meal based diet. The objectives of these studies were to investigate the impact of different dietary levels of manganese (Mn) and/or st...
Main Author: | |
---|---|
Format: | Others |
Language: | en |
Published: |
McGill University
1990
|
Subjects: | |
Online Access: | http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74293 |
id |
ndltd-LACETR-oai-collectionscanada.gc.ca-QMM.74293 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-LACETR-oai-collectionscanada.gc.ca-QMM.742932014-02-13T04:08:15ZManganese nutrition in rat and swine reproductionRhéaume, JohnSwine -- Reproduction.Rats -- Reproduction.Manganese.Trace elements in nutrition.Experiments were conducted with littermate gilts maintained in stainless steel metabolism cages within environmentally controlled rooms and consuming a corn-soybean meal based diet. The objectives of these studies were to investigate the impact of different dietary levels of manganese (Mn) and/or stage of the reproductive cycle on mineral metabolism and more specifically Mn metabolism in primigravid gilts and rats. Nutritional status was assessed using conventional balance studies, the analyses of physiological fluids (urine, plasma, colostrum, milk), tissues of the dam and offspring, and by a radioisotope dilution-balance technique. Trace element retention in the first-litter gilt was not significantly altered by dietary Mn restriction (11 $ mu$g/g DM) or by different stages of the reproductive cycle. In contrast, among the macro elements, phosphorus and perhaps calcium retention were improved in late gestation, whereas magnesium and nitrogen retention were unchanged. The weight of the litter at birth from dams consuming the low Mn (LMn) diet was significantly less than high Mn (HMn) gilts (96 $ mu$g/g DM). The Mn concentration in the liver and kidney of HMn gilts were significantly higher than in LMn gilts at the end of lactation. Likewise, the bones from HMn piglets contained higher concentrations of Mn at birth, and the liver and kidney concentrations were greater at weaning. Dietary Mn intake did not influence the rate of $ sp{54}$Mn excretion by the gilt during late gestation. The endogenous fecal Mn component was of similar magnitude, averaging 0.26 and 0.21 mg/d for the HMn and LMn gilts, respectively. However, the endogenous contribution to total fecal Mn was almost 8 fold different, representing 0.12% and 0.82% of total fecal Mn for the HMn and LMn gilts, respectively. The biological half-life of Mn in the body of the gilt was not influenced by dietary Mn within the intake range of 26 to 210 mg/d and averaged 54 days. The turnover rate (TR) of Mn was esMcGill University1990Electronic Thesis or Dissertationapplication/pdfenalephsysno: 001070659proquestno: AAINN63525Theses scanned by UMI/ProQuest.All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated.Doctor of Philosophy (Department of Animal Science.) http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74293 |
collection |
NDLTD |
language |
en |
format |
Others
|
sources |
NDLTD |
topic |
Swine -- Reproduction. Rats -- Reproduction. Manganese. Trace elements in nutrition. |
spellingShingle |
Swine -- Reproduction. Rats -- Reproduction. Manganese. Trace elements in nutrition. Rhéaume, John Manganese nutrition in rat and swine reproduction |
description |
Experiments were conducted with littermate gilts maintained in stainless steel metabolism cages within environmentally controlled rooms and consuming a corn-soybean meal based diet. The objectives of these studies were to investigate the impact of different dietary levels of manganese (Mn) and/or stage of the reproductive cycle on mineral metabolism and more specifically Mn metabolism in primigravid gilts and rats. Nutritional status was assessed using conventional balance studies, the analyses of physiological fluids (urine, plasma, colostrum, milk), tissues of the dam and offspring, and by a radioisotope dilution-balance technique. Trace element retention in the first-litter gilt was not significantly altered by dietary Mn restriction (11 $ mu$g/g DM) or by different stages of the reproductive cycle. In contrast, among the macro elements, phosphorus and perhaps calcium retention were improved in late gestation, whereas magnesium and nitrogen retention were unchanged. The weight of the litter at birth from dams consuming the low Mn (LMn) diet was significantly less than high Mn (HMn) gilts (96 $ mu$g/g DM). The Mn concentration in the liver and kidney of HMn gilts were significantly higher than in LMn gilts at the end of lactation. Likewise, the bones from HMn piglets contained higher concentrations of Mn at birth, and the liver and kidney concentrations were greater at weaning. Dietary Mn intake did not influence the rate of $ sp{54}$Mn excretion by the gilt during late gestation. The endogenous fecal Mn component was of similar magnitude, averaging 0.26 and 0.21 mg/d for the HMn and LMn gilts, respectively. However, the endogenous contribution to total fecal Mn was almost 8 fold different, representing 0.12% and 0.82% of total fecal Mn for the HMn and LMn gilts, respectively. The biological half-life of Mn in the body of the gilt was not influenced by dietary Mn within the intake range of 26 to 210 mg/d and averaged 54 days. The turnover rate (TR) of Mn was es |
author |
Rhéaume, John |
author_facet |
Rhéaume, John |
author_sort |
Rhéaume, John |
title |
Manganese nutrition in rat and swine reproduction |
title_short |
Manganese nutrition in rat and swine reproduction |
title_full |
Manganese nutrition in rat and swine reproduction |
title_fullStr |
Manganese nutrition in rat and swine reproduction |
title_full_unstemmed |
Manganese nutrition in rat and swine reproduction |
title_sort |
manganese nutrition in rat and swine reproduction |
publisher |
McGill University |
publishDate |
1990 |
url |
http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74293 |
work_keys_str_mv |
AT rheaumejohn manganesenutritioninratandswinereproduction |
_version_ |
1716646042232946688 |