Effect of hormonal synchronisation and/or short-term supplementation with maize on follicular dynamics and hormone profiles in goats during the non-breeding season

dc.contributor.authorNogueira, Daniel M.
dc.contributor.authorCavalieri, J.
dc.contributor.authorFitzpatrick, L.A.
dc.contributor.authorGummow, Bruce
dc.contributor.authorBlache, D.
dc.contributor.authorParker, A.J.
dc.date.accessioned2016-09-22T06:44:20Z
dc.date.issued2016-08
dc.description.abstractThis study aimed to evaluate the reproductive response of anoestrous goats that were either hormonally treated and/or supplemented with maize for 9days to determine which treatment combination was the most effective in enhancing follicular development and ovulation rate, and whether these responses were associated with increases in metabolic hormones. The experiment was carried out using 28 does, using a 2×2 factorial design with seven does in each group to test the effect of synchronisation of oestrus, supplementation with maize and their interactions. Synchronisation of oestrous cycles (P<0.001) but not supplementation with maize or the interaction between the two (P>0.05) increased the number of codominant follicles, the diameter of the largest follicle on Day 9 and growth rate of follicles during the period of supplementation. Compared with non-supplemented animals, supplementation with maize increased the total number of follicles observed between Days 7 and 9 (P=0.039). In addition, nutritional supplementation with maize in combination with synchronisation of oestrus increased the ovulation rate by 43% (P=0.074). Interactions between time and supplementation with maize showed that plasma concentrations of insulin, leptin and IGF-1 were greater in does supplemented with maize compared with non-supplemented does (P<0.001). The findings show that hormonal synchronisation had the most influence on modifying follicular development and ovulation in anoestrous goats. Supplementation with maize increased the concentrations of insulin, leptin and IGF-1, which could potentially modify the sensitivity of follicles to gonadotrophins and reduce rates of atresia.en_ZA
dc.description.departmentProduction Animal Studiesen_ZA
dc.description.embargo2017-08-31
dc.description.librarianhb2016en_ZA
dc.description.urihttp://www.elsevier.com/locate/anireproscien_ZA
dc.identifier.citationNogueira, DM, Cavalieri, J, Fitzpatrick, LA, Gummow, B, Blache, D & Parker, AJ 2016, 'Effect of hormonal synchronisation and/or short-term supplementation with maize on follicular dynamics and hormone profiles in goats during the non-breeding season', Animal Reproduction Science, vol. 171, pp. 87-97en_ZA
dc.identifier.issn0378-4320 (print)
dc.identifier.issn1873-2232 (online)
dc.identifier.other10.1016/j.anireprosci.2016.06.003
dc.identifier.urihttp://hdl.handle.net/2263/56787
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2016 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Animal Reproduction Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Animal Reproduction Science, vol. 171, pp. 87-97, 2016. doi : 10.1016/j.anireprosci.2016.06.003.en_ZA
dc.subjectAnoestrusen_ZA
dc.subjectBreeden_ZA
dc.subjectLH surgeen_ZA
dc.subjectProgesteroneen_ZA
dc.subjectReproductionen_ZA
dc.subjectSeasonalityen_ZA
dc.titleEffect of hormonal synchronisation and/or short-term supplementation with maize on follicular dynamics and hormone profiles in goats during the non-breeding seasonen_ZA
dc.typePostprint Articleen_ZA

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Nogueira_Effect_2016.pdf
Size:
236.02 KB
Format:
Adobe Portable Document Format
Description:
Postprint Article

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description: