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The effect of high environmental tem...

University of Guelph (Canada).

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The effect of high environmental temperature on semen quality of post-pubertal boars.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	The effect of high environmental temperature on semen quality of post-pubertal boars./
作者:	Sibblies, Deborah A.
面頁冊數:	141 p.
附註:	Source: Masters Abstracts International, Volume: 44-06, page: 2678.
Contained By:	Masters Abstracts International44-06.
標題:	Biology, Animal Physiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=MR14586
ISBN:	9780494145869

The effect of high environmental temperature on semen quality of post-pubertal boars.
Sibblies, Deborah A.

The effect of high environmental temperature on semen quality of post-pubertal boars. - 141 p.

Source: Masters Abstracts International, Volume: 44-06, page: 2678.

Thesis (M.Sc.)--University of Guelph (Canada), 2006.

Artificial Insemination (AI) has become an extensively used biotechnology in the swine industry, mainly because of the potential for intensive use of genetically superior sires. The objective of this study was to identify the impact of heat stress on boar semen production, sperm and testicular function and quality of extended semen. Post-pubertal boars were randomly assigned to one of two temperature regimes in an environmental chamber. Heat stressed boars were exposed to 34°C and 31°C for 10 days, while the control group of boars were exposed to 24°C and 21°C for the same period of time. Both groups had similar humidity and light and dark periods. Semen was evaluated during a spermatogenic cycle after which boars were slaughtered and testes tissue evaluated. Total number of spermatozoa per ejaculate was significantly lower (P<0.05) for the heat stressed boars. Motility measures and morphological characteristics were also significantly different, beginning almost immediately. Sperm viability in treatment boars were also significantly lower beginning as early as week 2 after treatment. After incubation in a capacitating medium for 6 hours, significantly fewer (P≤0.0001) sperm from heat stress boars were able to acrosome react. All measures of extended semen deteriorated significantly after storage. These results point to reduced fertilizing capabilities of semen for heat stress boars and its inability to be stored for use in AI.

ISBN: 9780494145869Subjects--Topical Terms:

1017835
Biology, Animal Physiology.

The effect of high environmental temperature on semen quality of post-pubertal boars.
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