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- W2103663314 abstract "Postnatal mortality represents a significant problem for the global pig industry(NAHMS, 1997, 2000; Herpin, Damon and Le Dividich, 2002), claiming 0.15 -0.20 of piglets born alive. In some less-developed countries, the rate may exceed0.30 (Lay, Matteri, Carroll, Fangman and Safranski, 2002; Losinger, 2005). Whilethe number of piglets born alive and the number weaned per litter have increasedsince 1998, the mortality rate has remained unchanged (Figure 11.1). On average0.75 of the deaths occur within three days of birth, emphasizing the need for earlyintervention. The underlying etiology is complex, but data indicate that inadequatenurture is among the leading causes, accounting for 0.20 of deaths (Figure 11.2).The impact of inadequate nutrition is even greater than direct estimates suggestbecause piglets suffering from starvation are more susceptible to crushing by thedam which is reported as the predominant cause of death (Figure 11.2). While theimportance of early nutrition has been recognized (Varley, 1995), practicalimprovements in mortality rate are yet to be realized possibly due to technicaldifficulties in implementation and in potential costs/benefit constraints.Starvation, although a consequence of inadequate nutrient supply, also canresult from inadequate nutrient utilization by the neonates. Because newbornpigs have very low energy reserves (< 0.02 body fat; Mannaert and McCrea,1963) with no immediate and appropriate nutrition at birth (Varley, 1995),milk lipids become the principal substrate for oxidative metabolism after birth,comprising 0.60 of dietary energy (Girard, Ferre and Duee, 1992). Furthermore,the energy requirement of the piglet is maximum in the immediate postnatalperiod due to their high relative growth rate, high relative surface area and theneed for thermoregulation (Le Dividich and Seve, 2000). Therefore, pigletsurvival greatly depends on their rapid metabolic adaptation to utilize milk fatas their primary postnatal fuel. However, metabolic studies suggest that neonatalpiglets have a limited capacity to catabolize fatty acids. Limitations may stem" @default.
- W2103663314 created "2016-06-24" @default.
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- W2103663314 date "2007-01-01" @default.
- W2103663314 modified "2023-09-26" @default.
- W2103663314 title "Idiosyncrasies of piglet lipid metabolism and their relationship to postnatal mortality." @default.
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