Volume 3, Issue 6 (3-2013)
Res Anim Prod 2013, 3(6): 80-90 |
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Joezy Shekalgorabi S, Ahad Shadparvar A. (2013). Simulation of the Effect of Utilizing Sex Sorted Semen on Number of Services Per Conception in Primiparous Cows. Res Anim Prod. 3(6), 80-90.
URL: http://rap.sanru.ac.ir/article-1-124-en.html
URL: http://rap.sanru.ac.ir/article-1-124-en.html
1- Islamic Azad University of Shahr_e_Qods Branch
2- University of Guilan
2- University of Guilan
Abstract: (6175 Views)
Number of services per conception is a valuable reproductive characteristic due to its effects on different reproductive, genetic and economic parameters of herd. On the other hand, this parameter is affected by the use of reproductive technologies like sexed semen. At the current study, employing a deterministic simulation model, four different scenarios (including continuous use of conventional semen, continuous use of sex sorted semen, the use of sexed semen at the first service followed by conventional semen at remained services and the use of sexed semen at the first and the second services followed by conventional semen for the later services) were compared by their effect on number of services per conceptions in heifers. Results indicated that the average number of services was greater when continuous utilization of sexed semen comparing to the rest of scenarios (4.2±1.33). a quadratic trend was found as a result of change in number of services per conception at different conception rates. Compared to continuous utilization of sexed semen, concurrent use of conventional and sexed semen had a moderating effect on number of services per conception. Due to lower fertility of heifers from second insemination it seems that mixed use of conventional and sexed semen is a preferable scenario. However choosing the suitable scenario needs further economic consideration.
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