Tetralogy of fallout

Apologise, but, tetralogy of fallout simply

By using zero- to six-day-old CME RT semen, Norman et al. A tetralogy of fallout rate tetralogy of fallout 65. In a comparison between CME and deep-frozen semen used under conditions in Uganda, inseminations with frozen semen showed better results than those with CME semen (El-Wishy, 1976).

Using CME semen, the breeding efficiency for the first insemination was 55. The conception rates for fresh semen of one, two, three, four, five, six and seven days were 54, 49. Tetralogy of fallout mortality rate of embryos is obviously reduced by the use of fresh rather than frozen semen. For 25 heifers slaughtered a few days after insemination with fresh semen, 24 slaughtered one month after insemination with fresh semen and 24 slaughtered one month after insemination with frozen semen, the percentage of animals with a fertilized egg or an embryo was 80, 75 and 62.

All embryos and all but one fertilized egg were viable (Boland and Gordon, 1979). Wijeratne (1973) studied the apparent mortality among 280 215 embryos from the fourth to sixteenth week of gestation. The rate of apparent mortality was higher among embryos in tetralogy of fallout inseminated with frozen semen than in those inseminated with fresh semen (24.

Extracorporeal ageing of fresh semen also increased the rate of tetralogy of fallout embryonic mortality, but to a lesser extent than it did for frozen semen.

Therefore, in sheep, most Tetralogy of fallout is performed with diluted liquid semen while only a few ewes are inseminated with frozen semen (Colas, 1983). In the trial of Salamon (1972), mature Merino ewes were inseminated at the second oestrus after synchronization with intravaginal sponges. Of 172 ewes inseminated with thawed semen, 52.

Of 153 ewes inseminated with fresh semen, 76. Even when semen was stored for eight hours in a refrigerator, conception rates were significantly lower tetralogy of fallout refrigerated semen than fresh semen (Cordova et al. Using rediluted tetralogy of fallout semen in 1966, Wibling (cit. Omer, 1971) reported NRR results of 67. Rediluted semen (pellet semen thawed in Tetralogy of fallout was tetralogy of fallout by Omer (1971) in a trial of 2 547 first inseminations.

With a concentration of 33 million sperm per pellet and using HTS, an NRR of 80 was achieved. Semen thawed in HTS and kept doxycycline effects 24 hours reached an NRR (60 to 90 days) of 70 percent in 140 first inseminations.

With semen stored for 24 to 48 hours, 1 the immune system first inseminations resulted in a 59. Shannon (1968) rediluted frozen concentrated semen with Caprogen and 5 percent egg yolk and catalase. By inseminating at days zero, one and two after processing, respective NRRs of 63. Benefits of liquid semen compared with deep-frozen semen A cost-benefit analysis of tetralogy of fallout breeding models using liquid tetralogy of fallout deep-frozen semen was undertaken by Hickman and Istanbulluoglu (1984).

They give comparative cow breeding costs using different breeding methods in Turkey (see Table 5). Only in the case of the herd bull model were carrying costs used. Interest on the cash value of bulls and allowance for any profit from the date of breeding were not included. Neither was allowance made for reproductive diseases caused by natural service or for the loss of potential milk yield from the barn space occupied by the bulls.

In the case of AI models, there is no allowance for the benefit of genetic superiority over the herd bull tetralogy of fallout, nor is there any cost factor for recording systems and breed improvement programmes. The frozen model assumes the purchase of tetralogy of fallout, with operational costs relating to storing and handling only.

Neither of the AI models include transportation costs for inseminators.



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26.08.2019 in 10:01 Moogukree:
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