Download Factors Affecting Calf Crop: Biotechnology of Reproduction by Michael J., Fields, Michael J. Fields, Robert S. Sand, Joel PDF

By Michael J., Fields, Michael J. Fields, Robert S. Sand, Joel V. Yelich

In contemporary global, we're witnessing simultaneous breakthroughs in reproductive applied sciences, genomics, and molecular biology. Advances in molecular genetic know-how and knowing of the bovine genome have resulted in the advance of instruments that may be used to augment profitability on cow-calf companies. elements Affecting Calf Crop: Biotechnology of replica presents a close compilation of present and imminent know-how for coping with replica in livestock. The ebook discusses themes equivalent to: licensed suggestions for controlling the estrous cycle in farm animals; coping with follicular development with progesterone, estrogens, and prostaglandins; freezing, thawing, and move of farm animals embryos; program of embryo move to the meat livestock undefined; embryo move in topically tailored livestock; new elements affecting bull fertility; embryo assortment and usage expertise, in vitro fertilization, somatic mobilephone cloning, and genetic applied sciences; makes use of of real-time ultrasound; and sexed semen. Over 25 prime animal scientists have mixed their services to supply the 1st single-source reference that covers profitable reproductive ideas that may, probably, be the wave of the long run. Expansive in scope, the booklet addresses present biotechnologies as they impression the creation of red meat livestock. Written at a degree to entice the researcher, advertisement manufacturer, or scholar, components Affecting Calf Crop: Biotechnology of replica provides you with a wealth of applied sciences appropriate to animal agriculture.

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E. Long. 1989. Behavioral predictors of oestrus in domestic cattle, Bos taurus. Anim. Behav. 38:913. L. J. D. L. McGilliard. 1990. Effectiveness of rump-mounted devices and androgenized females for detection of estrus in dairy cattle. J. Dairy Sci. 73:2965. Herrick, J. 1978. Breeding time requires good eyesight and cow knowledge. Adv. Anim. Breeder, pp. 15. May 1978. S. Lewis, and E. Aizinbud. 1992. Estrus detection in cattle: recent developments. Anim. Reprod. Sci. 28:355. S. L. Spahr. 1991. Activity monitoring and an enzyme immunoassay for milk progesterone to aid in the detection of estrus.

2). Pregnancy rates for days 1 through 5 were similar between AILAI and control heifers (16% vs. 09) for cows (12% vs. 2). 2 Least Squares Means for Control vs. 05). 10). See the Materials and Methods Section for a description for each group. Thirty-eight herds with a total of about 5400 cows and 19 herds with a total of about 2761 heifers were included in these studies. W. , 1981. With permission. control cattle for days 1 through 9 for cows (39% vs. 26%) and heifers (45% vs. 24%) and for days 1 through 24 for cows (56% vs.

J. McKnight, R. J. J. Burton. 1998. Estrus detection using radiotelemetry or visual observation and tail painting for dairy cows on pasture. J. Dairy Sci. 81:2890. fm Page 23 Wednesday, September 26, 2001 1:41 PM 3 Use of Prostaglandin F2α (PGF2α) in Cattle Breeding J. W. 33 From a historical perspective, in the 1930s, ejaculates of both ram and man were demonstrated to possess in vitro uterine strip contractility. The biologic activity could not be accounted for by known substances. Sheep prostate glands became the source of material in the search for the biologic activity and chemical structure of the unknown substance(s).

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