Nutrition, metabolic profiles and puberty in Brahman (Bos indicus) beef heifers

Samadi, F., Blache, D., Martin, G. B. and D'Occhio, M. J. (2014) Nutrition, metabolic profiles and puberty in Brahman (Bos indicus) beef heifers. Animal Reproduction Science, 146 3-4: 134-142. doi:10.1016/j.anireprosci.2014.03.004


Author Samadi, F.
Blache, D.
Martin, G. B.
D'Occhio, M. J.
Title Nutrition, metabolic profiles and puberty in Brahman (Bos indicus) beef heifers
Formatted title
Nutrition, metabolic profiles and puberty in Brahman (Bos indicus) beef heifers
Journal name Animal Reproduction Science   Check publisher's open access policy
ISSN 0378-4320
1873-2232
Publication date 2014-05
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.anireprosci.2014.03.004
Open Access Status
Volume 146
Issue 3-4
Start page 134
End page 142
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Formatted abstract
The aim of the present study was to gain an improved understanding of the relationships between body weight (BW), body condition (BCS), and metabolic homeostasis, and the attainment of puberty in Brahman heifers in a subtropical environment. Brahman heifers (200 ± 3 kg BW; 2.00 ± 0.0 BCS) were assigned to a moderate nutrition (MN, n = 11) or improved nutrition (IN, n = 11) treatment from 11 to 23 months-of-age. The heifers were monitored at regular intervals for circulating concentrations of GH, IGF-1, insulin, glucose and leptin, and ovarian follicular activity was recorded until the first ovulation. From approximately 16 months of age, heifers on IN had a greater (P < 0.01) BW and greater (P < 0.01) BCS than heifers on MN. Heifers on IN also had a generally improved metabolic homeostasis than heifers on MN which was reflected in greater circulating concentrations of insulin, leptin, IGF-1 and glucose in the former heifers. Heifers on IN attained puberty between 21 and 23 months of age and only one heifer on MN had reached puberty by 23 months. This study has shown that Brahman heifers on IN had a metabolic homeostasis that was supportive of reproductive maturation and puberty.
Keyword Nutrition
Metabolic profiles
Puberty
Beef heifers
Bos taurus indicus
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2015 Collection
 
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