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Effect of Season on Pregnancy Rates, Milk Progesterone, and Milk Melatonin Profiles in Water Buffalo Reared in Canada

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dc.contributor.advisor King, Allan
dc.contributor.author Dharap, Anuja
dc.date.accessioned 2016-07-22T14:10:36Z
dc.date.available 2016-07-22T14:10:36Z
dc.date.copyright 2016-06
dc.date.created 2016-06-03
dc.date.issued 2016-07-22
dc.identifier.uri http://hdl.handle.net/10214/9796
dc.description.abstract Having recently been introduced to Canada, water buffalo products have a growing market demand. While water buffaloes are seasonal breeders in some environments, the impact of season on estrus patterns in Canada is unknown. Pregnancy rates for buffaloes artificially inseminated in different seasons following synchronization or natural estrus were calculated. Milk samples were used to determine variation in progesterone and melatonin during summer (long days) and winter (short days). Milk was collected from randomly selected buffaloes and hormones were measured via enzyme-linked immunosorbent assays (ELISA). Spring and summer pregnancy rates were lower than in fall and winter. Spring and summer samples showed low progesterone concentrations with abrupt rise and fall. Fall and winter samples showed high progesterone with prolonged peaks and 20-22-day estrous cycles. No significant trend was observed in melatonin levels. Results indicate breeding seasons in Canada are fall and winter while low breeding seasons are spring and summer. en_US
dc.description.sponsorship OMAFRA, Canada Research Chairs, OVC en_US
dc.language.iso en en_US
dc.rights Attribution 2.5 Canada *
dc.rights.uri http://creativecommons.org/licenses/by/2.5/ca/ *
dc.subject water buffalo en_US
dc.subject milk en_US
dc.subject progesterone en_US
dc.subject melatonin en_US
dc.subject seasonality en_US
dc.subject pregnancy rates en_US
dc.title Effect of Season on Pregnancy Rates, Milk Progesterone, and Milk Melatonin Profiles in Water Buffalo Reared in Canada en_US
dc.type Thesis en_US
dc.degree.programme Biomedical Sciences en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Biomedical Sciences en_US
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Attribution 2.5 Canada Except where otherwise noted, this item's license is described as Attribution 2.5 Canada