Climatic factors affecting quantity and quality grade of in vivo derived embryos of cattle

Aim. To identify the main types of risks, remarkable for agricultural dairy production, to evaluate the consequences of their increase and to substantiate a comprehensive system of managing them on the level of enterprise which would promote their minimization and neutralization. Methods. Common methods and techniques were applied in the study: a combination of scientifi c techniques of abstract-logical method of elaborating theoretical provisions, deduction method while isolating specifi c risks in dairy farming from the total amount, empirical methods of investigating the activity of dairy enterprises and computer generated simulation while substantiating practical instruments of risk management in agricultural dairy production. The correlation-regression analysis was used for statistical processing of the data and study results. Results. During the investigation the following kinds of risks in dairy production were isolated: natural, ecological, technological, market-related risks. The natural risk is related to the environmental impact, fi rst and foremost, to the change in temperature regime of the environment of keeping cows, ecological component of manure utilization. The technological risk is characterized by violating the conditions of keeping cows at farms, which is manifested via loss and disposal of cows from the core herd. It has been found that currently the distribution of diseases, i.e. epizootic situation in the country, presents increased risk for farms. One of the ways to neutralize and minimize the manifestation of technological risks is improving biosafety of stock breeding complexes and developing the insurance of livestock. In addition to risks of diseases (infectious, invasion, non-contagious) and other standard risks (fi re, natural disasters, etc.), it is reasonable to insure against the following kinds of risks: interrupted production (caused by death or loss of insured animals), after which current expenses for renewal of production or forfeited profi t would be reimbursed automatically or after submission of confi rmation documents; transportation of animals, including sea, air, and railway travel; expenses to remove the remains of animals after the insured event which caused their death; reimbursing the expenses for elimination of consequences, caused by infectious diseases, which made it impossible to renew the production without prior applica- tion of disinfectants. While evaluating market-related risks, special attention should be given to the relations of producers and processors of milk. Market risks are closely related to technological risks, as milk quality has a decisive impact on the formation of procurement prices. Conclusions. The systematization of risks in dairy farming should be performed in accordance to the total system of their manifestation and to specialized identifi cation which characterizes specifi cities of this sphere. The probability of most risks, occurring in dairy production, is considerably dependent on the effi ciency of managers of agricultural enterprises and partially on legislative and executive branches of power (in the part of legisla- tive provisions). Currently the mitigation of environmental risks is possible only on condition of searching for internal reserves of ensuring the stability of dairy farming, which envisages creating conditions for production of high quality milk, minimization of expenses for its production and sale, compliance with agreements with contractors.

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“…The fi rst consequence of overwarming is the reduction in yields by 10-35 %. There is an increasing risk of acidosis [21][22][23].…”

Section: Resultsmentioning

confidence: 99%

Risks of dairy farming in Ukraine and ways of their minimization and neutralization

Varchenko¹,

Radko²,

Rudych³

et al. 2019

Agric. sci. pract.

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“…The HF*Boran donor cows produced a significantly higher number of Grade 1-3 quality embryos compared with the Boran breed in this study. Different kinds of literature (Alarcón et al, 2010;Trigal et al, 2012;Vieira et al, 2014;Tadesse et al, 2016;Chinchilla-Vargas et al, 2018) suggest the source of these variations to be related to breed, reproductive behaviour, environmental factors or interaction of all.…”

Section: Discussionmentioning

confidence: 99%

Influence of breed on the quality of in vivo produced embryos from Boran and Holstein Friesian cross dairy breed in Ethiopia

Jemal¹,

Degefa²,

Ali³

et al. 2021

Ethiop. Vet. J.

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The variation of the dairy breed can determine the success of bovine embryo transfer by influencing the quantity and quality of in vivo embryo production. In this experiment, output and quality of in vivo produced embryos using semen of progeny tested Holstein Friesian (HF) sire in Boran and HF*Boran F1 cross cows, and semen from purebred Boran sire in HF*Boran F1 cross and Boran cows were evaluated. Boran (n=18) and HF*Boran cross (n=18) breed donor dams were superovulated using a previously optimized follicular stimulating hormone (FSH) (Pluset®) dose regimen: 650 IU for HF*Boran cross and 250 IU for Boran breeds. Each cow was flushed on Day-7 post insemination and embryos were evaluated for their developmental stages and quality. Superovulatory response rates were 88.9% and 83.3%, respectively, for Boran and HF*Boran with no significant (P>0.05) breed differences. Total recovery rates were relatively lower (56.5%) in Boran compared to in HF*Boran (67.4%). The mean (±SE) embryo flush outputs were 6.5±0.8 for Boran and 6.9±0.7 forHF*Boran with no significant breed difference. Recovery of a transferrable embryo was significantly higher (68.0%; P<0.05) in HF*Boran dam inseminated with HF sire semen. Boran cows yielded a significantly higher (P<0.05) proportion of unfertilized ovum (57.6 %) irrespective of the sire breeds. Comparatively, a higher number of degenerated embryos were produced by HF*Boran cows. This study demonstrated that the presence of breed-related differences in both the quality and quantity of in vivo produced Bovine embryos.

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“…Climatic variations at the beginning of the period of activation of ovarian follicular development up to the time of fertilization may interfere with the production of embryos. Thus, actions such as changing the time of embryo transfer protocols, based on previous and current climate patterns, seems to be an alternative to optimize the return on investment when using these reproductive technologies (Chinchilla-Vargas et al al. 2018).…”

Section: Alternatives To Minimize the Effects Of The Transition Periomentioning

confidence: 99%

Strategies for increasing fertility in high productivity dairy herds

Bragança¹,

Zangirólamo²

2018

Anim Reprod

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Over the years, the dairy cow has been selected and managed for high performance and efficiency in milk production. Thus, different factors influence the fertility of dairy cows of high productivity. It has been observed that genetic selection for large productions and metabolic adaptations may explain the greater requirement to maintain reproduction at satisfactory levels. Also, these animals are more susceptible to environmental factors such as increased temperature and humidity. Studies have shown that heat stress results in reduced estrous expression and impairs ovarian function, interfering with folliculogenesis and steroidogenesis. Likewise, under heat stress conditions, dry matter intake is reduced, prolonging the after calving negative energy balance and calving-conception interval. Thus, suboptimal reproductive performance is one of the main factors responsible for the economic losses in large dairy farms. In this context, numerous management practices have been introduced to improve reproduction in high productivity animals, making reproductive management increasingly complex in dairy farms. Among them, we can mention the implementation of management and nutrition conditions adapted to the periods of heat stress, as well as protocols and biotechniques that improve the quality of the follicles and oocytes. Thus, because genetic selection for better fertility animals is a characteristic of low heritability, the success of reproductive programs in highly productive herds depends on the association of the control of genetic and physiological factors with those of environmental, nutritional and management. This paper aims to discuss reproductive aspects of dairy cows of high productivity, the role of heat stress in this context, and the implementation of management, nutrition and biotechnology conditions, to minimize the adverse effects on the reproduction of these animals.

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Climatic factors affecting quantity and quality grade of in vivo derived embryos of cattle

Cited by 8 publications

References 31 publications

Risks of dairy farming in Ukraine and ways of their minimization and neutralization

Risks of dairy farming in Ukraine and ways of their minimization and neutralization

Influence of breed on the quality of in vivo produced embryos from Boran and Holstein Friesian cross dairy breed in Ethiopia

Strategies for increasing fertility in high productivity dairy herds

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