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001-es BibID:	BIBFORM107693
Első szerző:	Ortega, Arth David Sol Valmoria (PhD student)
Cím:	Effects of heat stress-induced oxidative stress on the reproduction of sows and its alleviation by dietary antioxidants: a review / Ortega Arth David Sol Valmoria, Xayalath Somsy, Lugata James Kachunhwa, Szabó Csaba
Dátum:	2022
Megjegyzések:	Sows are susceptible to high ambient temperature, and when it exceeds the level of their thermal comfort, they experience heat stress (HS). HS causes overproduction and accumulation of reactive oxygen species (ROS) in cells and can disturb the animals' antioxidant defense system, leading to oxidative stress (OS). Such stressor causes oxidative damage to proteins, lipids, polysaccharides, and DNA in cells and tissue damage. HS-induced OS also harms the sows' reproductive development. It can negatively affect the physiological process of the animals' reproduction from the maturation of oocytes to fertilization, development of the embryo, and pregnancy. It even extends to their reproductive performance. Although HS harms female reproduction, information regarding its induced stressor (OS) as the significant contributor to sows' reduced reproductive performance is limited. Therefore, this paper aims to review the effects of HS-induced OS on the reproductive performance of sows, and with due consideration to its nature, this work will also look into the effectiveness of dietary antioxidants against its adverse effects. Based on the literature, sows exposed to HS had increased plasma concentration of OS biomarkers (malondialdehyde, protein carbonyl, and 8-hydroxy-deoxyguanosine) and reduced activity of endogenous antioxidants, signifying OS. This resulted in reduced reproductive performance of sows, including lower litter weight at birth and a higher number of low birth weight piglets (higher variance) which causes high pre-weaning mortality. Moreover, the sows' colostrum, milk yield, and nutrient concentration are reduced upon exposure to the said stressor. Based on the information from various researches, dietary supplementation of antioxidants (vitamin C, E, and minerals Se and Zn) through the diet at various stages of sows' life could ameliorate HS-induced OS. Such amelioration can be supported by several researches which reported improvement in the sows' antioxidant status by increased activity of endogenous antioxidants (SOD, CAT, and GSH-Px) and subsequently improving their reproductive performance. Based on the information gathered, the enhancement of the antioxidant status and improvement of the sows' reproductive performance was exhibited when dietary levels of antioxidants are supplemented at high levels, suggesting the importance of regulating the dietary antioxidant levels in the diet upon HS challenge.
ISBN:	978-615-82054-8-1
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok előadáskivonat könyvrészlet
Megjelenés:	XXV. Tavaszi Szél Konferencia 2022 : Absztraktkötet / szerk. Molnár Dániel, Molnár Dóra. - p. 72-73. -
További szerzők:	Xayalath, Somsy (1982-)(PhD hallgató) Lugata, James Kachungwa (1992-) (Ph.D hallgató) Szabó Csaba (1968-) (agrármérnök)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM107188
Első szerző:	Ortega, Arth David Sol Valmoria (PhD student)
Cím:	Effects of heat stress-induced oxidative stress on the reproduction of sows and its alleviation by dietary antioxidants: a review / Arth David Sol Valmoria Ortega, Somsy Xayalath, James Kachungwa Lugata, Csaba Szabó
Dátum:	2022
Megjegyzések:	Sows are susceptible to high ambient temperature, and when it exceeds the level of their thermal comfort, they experience heat stress (HS). HS causes overproduction and accumulation of reactive oxygen species (ROS) in cells and can disturb the animals' antioxidant defense system, leading to oxidative stress (OS). Such stressor causes oxidative damage to proteins, lipids, polysaccharides, and DNA in cells and tissue damage. HS-induced OS also harms the sows' reproductive development. It can negatively affect the physiological process of the animals' reproduction from the maturation of oocyte to fertilization, development of the embryo, and pregnancy. Their reproductive performance is also compromised; sows exposed to HS can result in lower litter weight at birth, higher number of low birth weight piglets (higher variance) which causes high pre weaning mortality. Moreover, the sows' colostrum, milk yield, and nutrient concentration can be reduced upon exposure to the said stressor, demanding an efficient mitigation strategy. Understanding the sows' reproduction and HS-induced OS influence on its viability is vital in providing proper mitigation strategy. Therefore, this paper aimed to review the female pigs' reproductive development, the impact of HS-induced OS on their reproduction, and the possible alleviation of its adverse effects by dietary antioxidants. Based on the information from various researches, antioxidant fortified diet fed to sows at various stages of life could ameliorate HS-induced OS. Several researches have confirmed this by improving the sows' antioxidant status as supported by increased activity of endogenous antioxidants (SOD, CAT, and GSH-Px) and subsequently improving their reproductive performance. Based on the information gathered, the enhancement of the antioxidant status and improvement of the sows' reproductive performance was exhibited when dietary levels of antioxidants are supplemented at high levels, suggesting the importance of regulating the dietary antioxidant levels in the diet upon HS challenge.
ISBN:	978-615-6457-13-4
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok előadáskivonat könyvrészlet Heat stress oxidative stress dietary antioxidants antioxidant status sows' reproductive performance
Megjelenés:	XXV. Tavaszi Szél Konferencia 2022 : Tanulmánykötet I. / szerk. Molnár Dániel, Molnár Dóra, Nagy Adrián Szilárd. - p. 13-25. -
További szerzők:	Xayalath, Somsy (1982-)(PhD hallgató) Lugata, James Kachungwa (1992-) (Ph.D hallgató) Szabó Csaba (1968-) (agrármérnök)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM104322
Első szerző:	Ortega, Arth David Sol Valmoria (PhD student)
Cím:	Perspectives of the livestock sector in the Philippines: A review / Arth David Sol Ortega , Malam Abulbashar Mujitaba , Somsy Xayalath , Winson Gutierrez , Ana Celina Soriano , Csaba Szabó
Dátum:	2021
ISSN:	2416-1640 1588-8363 1587-1282
Megjegyzések:	The Philippine livestock industry is a vital component in the country's agricultural sector. It contributes around 18.23 percent of the gross output value in agriculture and provides livelihood to many people living in rural areas, signifying its importance with regard to the country's economy. The constantly increasing demand for animal protein associated with the increase of the world's population led to the intensification of livestock production, realized through the various initiatives implemented by the government, such as the import of high producing purebreds of various species. This strategy greatly influenced the country's animal genetic resource's diversity and increased food animals' population; however, it impacted the native breeds of food animals. Understanding the characteristics, performance and value of native and exotic breeds is essential to prioritize their livestock industry existence. Thus, this paper aims to cha racterize various native and exotic breeds of livestock in the Philippines and assess the current conservation of native animals.
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk native breed exotic breed diversity conservation
Megjelenés:	Acta agraria Debreceniensis. - 2021 : 1 (2021), p. 175-188. -
További szerzők:	Mujitaba, Malam Abulbashar (1986-) Xayalath, Somsy (1982-)(PhD hallgató) Gutierrez, Winson Soriano, Ana Celina Szabó Csaba (1968-) (agrármérnök)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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