The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
G. Bilkei - One of the best experts on this subject based on the ideXlab platform.
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Effect of Gonadotropins during Hot Summer Season Given at Different Times after Weaning on Selected Reproductive Indicators of the Sow
Acta Veterinaria Brno, 2008Co-Authors: S. P. Franek, G. BilkeiAbstract:Franek S.P., G. Bilkei: Effect of Gonadotropins during Hot Summer Season Given at Different Times after Weaning on Selected Reproductive Indicators of the Sow. Acta Vet. Brno 2008, 77: 193-198. The experiment was performed on a large indoor herd during a hot season period in Alfold, Hungary. The post-weaning Sows (F1 and F2 of Large White × Landrace mated to Duroc boars (mean parity 3.4 +/-0.7 SD; mean body condition 3.01 +/-0.3 SD, previous lactation length of 28.3 +/-1.5 d) were divided into four groups of similar body condition, lactation length and parity and were treated as follows: Group 1: Sows (n = 420) were injected subcutaneously with 400 I.U. of Gonadotropinum sericum (pregnant mare serum gonadotropin, PMSG [eCG]) and 200 I.U. of Gonadotropinum chorionicum (human choriongonadotropin, HCG [hCG]) one day after weaning. Group 2: Sows (n = 405) received subcutaneously 4 ml of saline injection one day after weaning. Group 3: Sows (n = 425), purposely chosen from among animals that did not show heat within 7 days after weaning, were treated on day 7 post-weaning with PMSG and HCG as the animals in group 1. Group 4: Sows (n = 415) purposely chosen from among animals that did not show heat within 7 days after weaning, were treated on day 7 post-weaning as group 2. Sows expressing oestrus, Sows ovulating after treatment, treatment to oestrus intervals and follicular sizes were evaluated. The number of Sows expressing oestrus, Sows ovulating, and treatment to oestrus intervals differed between the groups (group 1 vs. 2: P < 0.05, group 3 vs. 4: P < 0.01). The Sows treated with PMSG and HCG on day 7 post-weaning (group 3) had smaller (P < 0.05) follicular diameters compared to the Sows that were treated one day after weaning. Group 4 Sows had a smaller follicular diameter (3.6 +/- 0.6 mm) compared to group 1 (P < 0.001) and 3 (P < 0.01). The present results show that the gonadotropin treatment one day after weaning or in the case of anoestrus 7 days after weaning overrides the negative effects of the hot summer season and effectively prevents seasonal infertility of the breeding Sow. Swine, reproduction, seasonal anoestrus, gonadotropin, season, infertility
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Correlations of Prepartum Body Temperature and Postpartum Fever of Sows with Vulvovaginal Discharge: a Case Report
Acta Veterinaria Brno, 2005Co-Authors: S. P. Franek, G. BilkeiAbstract:Franek S. P., G. Bilkei:Correlations of Prepartum Body Temperature and Postpartum Fever of Sows with Vulvovaginal Discharge: a case report. Acta Vet Brno 2005, 74: 2005: 395-399. In a large pig breeding unit, Sows suffering from prepartum vulvovaginal discharge were selected (n = 159) for the trial. Rectal temperatures were recorded daily on days 110-113 of pregnancy and during the first 3 days post partum. Fifty-two Sows (group one) had higher than 39.0 °C (39.3 ± 0.3 SE °C), 107 Sows (group two) had lower than 39.0 °C (38.6 ± 0.2 SE °C) “three days average prepartal rectal temperatures”. While all Sows in group one developed postparturient fever (40.5 ± 0.2 SE °C), only 19 of 107 (17.8%) Sows with lower prepartum temperatures had postparturient fever (P < 0.001). Blood samples were collected on days 1, 3 and 5 post partum to determine the concentration of acute phase proteins. Mean serum alpha 1-acid glycoproteins (AGP) and haptoglobin (HPT) concentrations were higher on days 1, 3 and 5 (P < 0.001) post partum in Sows suffering postparturient fever. Our results have shown that in farrowing units with high prevalence of preparturient vulvovaginal discharges, prefarrowing rectal temperatures might indicate impending postparturient disease of the Sow. Swine, Sow, parturition, prepartum body temperature, postpartum fever vulvovaginal discharge The reproductive performance of the breeding Sow is a key measure in the pig production. While many factors influence the profitability of Swine production, the number of piglets produced per Sow per year (Pig/Sow/Year, PSY) and number of non-productive days (NPD) belong to the most important measures of productivity ( Stelzer et al. 1997). Both PSY and NPD are significantly influenced by postparturient diseases of the Sows ( Akos and Bilkei 2004). Lactation failure and early postpartal diseases of Sows belong to major causes of Sow mortality and low reproductive performance in pig breeding units ( Karg and
S. P. Franek - One of the best experts on this subject based on the ideXlab platform.
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Effect of Gonadotropins during Hot Summer Season Given at Different Times after Weaning on Selected Reproductive Indicators of the Sow
Acta Veterinaria Brno, 2008Co-Authors: S. P. Franek, G. BilkeiAbstract:Franek S.P., G. Bilkei: Effect of Gonadotropins during Hot Summer Season Given at Different Times after Weaning on Selected Reproductive Indicators of the Sow. Acta Vet. Brno 2008, 77: 193-198. The experiment was performed on a large indoor herd during a hot season period in Alfold, Hungary. The post-weaning Sows (F1 and F2 of Large White × Landrace mated to Duroc boars (mean parity 3.4 +/-0.7 SD; mean body condition 3.01 +/-0.3 SD, previous lactation length of 28.3 +/-1.5 d) were divided into four groups of similar body condition, lactation length and parity and were treated as follows: Group 1: Sows (n = 420) were injected subcutaneously with 400 I.U. of Gonadotropinum sericum (pregnant mare serum gonadotropin, PMSG [eCG]) and 200 I.U. of Gonadotropinum chorionicum (human choriongonadotropin, HCG [hCG]) one day after weaning. Group 2: Sows (n = 405) received subcutaneously 4 ml of saline injection one day after weaning. Group 3: Sows (n = 425), purposely chosen from among animals that did not show heat within 7 days after weaning, were treated on day 7 post-weaning with PMSG and HCG as the animals in group 1. Group 4: Sows (n = 415) purposely chosen from among animals that did not show heat within 7 days after weaning, were treated on day 7 post-weaning as group 2. Sows expressing oestrus, Sows ovulating after treatment, treatment to oestrus intervals and follicular sizes were evaluated. The number of Sows expressing oestrus, Sows ovulating, and treatment to oestrus intervals differed between the groups (group 1 vs. 2: P < 0.05, group 3 vs. 4: P < 0.01). The Sows treated with PMSG and HCG on day 7 post-weaning (group 3) had smaller (P < 0.05) follicular diameters compared to the Sows that were treated one day after weaning. Group 4 Sows had a smaller follicular diameter (3.6 +/- 0.6 mm) compared to group 1 (P < 0.001) and 3 (P < 0.01). The present results show that the gonadotropin treatment one day after weaning or in the case of anoestrus 7 days after weaning overrides the negative effects of the hot summer season and effectively prevents seasonal infertility of the breeding Sow. Swine, reproduction, seasonal anoestrus, gonadotropin, season, infertility
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Correlations of Prepartum Body Temperature and Postpartum Fever of Sows with Vulvovaginal Discharge: a Case Report
Acta Veterinaria Brno, 2005Co-Authors: S. P. Franek, G. BilkeiAbstract:Franek S. P., G. Bilkei:Correlations of Prepartum Body Temperature and Postpartum Fever of Sows with Vulvovaginal Discharge: a case report. Acta Vet Brno 2005, 74: 2005: 395-399. In a large pig breeding unit, Sows suffering from prepartum vulvovaginal discharge were selected (n = 159) for the trial. Rectal temperatures were recorded daily on days 110-113 of pregnancy and during the first 3 days post partum. Fifty-two Sows (group one) had higher than 39.0 °C (39.3 ± 0.3 SE °C), 107 Sows (group two) had lower than 39.0 °C (38.6 ± 0.2 SE °C) “three days average prepartal rectal temperatures”. While all Sows in group one developed postparturient fever (40.5 ± 0.2 SE °C), only 19 of 107 (17.8%) Sows with lower prepartum temperatures had postparturient fever (P < 0.001). Blood samples were collected on days 1, 3 and 5 post partum to determine the concentration of acute phase proteins. Mean serum alpha 1-acid glycoproteins (AGP) and haptoglobin (HPT) concentrations were higher on days 1, 3 and 5 (P < 0.001) post partum in Sows suffering postparturient fever. Our results have shown that in farrowing units with high prevalence of preparturient vulvovaginal discharges, prefarrowing rectal temperatures might indicate impending postparturient disease of the Sow. Swine, Sow, parturition, prepartum body temperature, postpartum fever vulvovaginal discharge The reproductive performance of the breeding Sow is a key measure in the pig production. While many factors influence the profitability of Swine production, the number of piglets produced per Sow per year (Pig/Sow/Year, PSY) and number of non-productive days (NPD) belong to the most important measures of productivity ( Stelzer et al. 1997). Both PSY and NPD are significantly influenced by postparturient diseases of the Sows ( Akos and Bilkei 2004). Lactation failure and early postpartal diseases of Sows belong to major causes of Sow mortality and low reproductive performance in pig breeding units ( Karg and
M. B. Menegat - One of the best experts on this subject based on the ideXlab platform.
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27 Defining a robust Sow: Swine nutrition perspective on reproduction and lactation
Journal of Animal Science, 2019Co-Authors: Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jason C Woodworth, Steve S Dritz, M. B. MenegatAbstract:Abstract Improvements in modern Sow prolificacy have markedly increased the number of pigs weaned, thus the ability of Sows to provide nutrients to support fetal growth and milk production has been enhanced. The goals of the gestation nutrition program consist of meeting the nutrient requirements for maintenance and growth and for adequate conceptus development, while managing body condition. Early gestation represents the best opportunity for replenishing body reserves, whereas in late gestation, both estimated protein deposition and energy requirement are exponentially increased and directed towards fetal growth and mammary development. Increased feed intake after breeding has been presumed to be detrimental to embryo survival; however, data with modern line Sows demonstrates to feed thin Sows to recover body condition as quickly as possible while avoiding feed deprivation immediately after breeding. Importance of body condition scoring remains unchanged: feed thin Sows to bring back to adequate body condition and prevent over-conditioned Sows at farrowing. A recent meta-analysis showed increasing late gestation feed intake seems to modestly improve piglet birth weight by 28 g per piglet in gilts and Sows. Also, recent findings in gestating Sows suggest modern genotypes have improved feed efficiency and propensity for growth. Therefore, increasing energy intake during late gestation has a modest effect on piglet birth weight and a negative effect on stillborn rate. Historically, lactation catabolism impacted subsequent reproductive performance of Sows, particularly in first-parity. However, contemporary Sows appear to be increasingly resistant to the negative effects of lactational catabolism. Even so, continued emphasis on maximizing lactation feed intake is critical to support milk production and prevent excessive lean tissue mobilization. Research data suggests that ad libitum feeding and offering lactation diets during the wean-to-estrus interval is not needed. Modern genetic Sow lines appear to be more robust from a nutritional perspective than in the past.
Caitlyn E. Abell - One of the best experts on this subject based on the ideXlab platform.
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The Effect of Breeding Herd Parity Structure on Genetic Improvement of the Sow Herd
2009Co-Authors: Caitlyn E. AbellAbstract:This study focuses on the value of the genetic lag associated with maintaining Sows for additional parities in a commercial Swine herd. Three traits were included in this study: number born alive (NBA), 21 day litter weight (W21), and days to market (D250). The economic values assigned to these traits were $22.00/pig, $0.70/lb., and $0.17/day, respectively. The genetic improvement per generation made for each trait was assumed to be 0.3 pigs, 3.0 lbs., and 3.0 days, respectively. It was estimated that the value of the genetic lag associated with retaining a Sow to P3, P5, and P7 was $24.80, $46.89, and $73.97 in a herd whose seedstock supplier has a generation interval of 1.5 years. This minimal loss does not justify the costs of developing a gilt and decreased P1 production. Therefore, Sows should remain in the breeding herd until culling for non-voluntary reasons or inferior production becomes necessary. INDEX WORDS: Genetic lag, Generation interval, Parity, Sow, Swine Copyright by Caitlyn E. Abell 2009 THE EFFECT OF GENETIC LAG AND ITS ASSOCIATED ECONOMIC VALUE ON GILT REPLACEMENT DECISIONS IN COMMERCIAL Swine BREEDING HERDS
Joel M. Derouchey - One of the best experts on this subject based on the ideXlab platform.
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27 Defining a robust Sow: Swine nutrition perspective on reproduction and lactation
Journal of Animal Science, 2019Co-Authors: Joel M. Derouchey, Michael D. Tokach, Robert D. Goodband, Jason C Woodworth, Steve S Dritz, M. B. MenegatAbstract:Abstract Improvements in modern Sow prolificacy have markedly increased the number of pigs weaned, thus the ability of Sows to provide nutrients to support fetal growth and milk production has been enhanced. The goals of the gestation nutrition program consist of meeting the nutrient requirements for maintenance and growth and for adequate conceptus development, while managing body condition. Early gestation represents the best opportunity for replenishing body reserves, whereas in late gestation, both estimated protein deposition and energy requirement are exponentially increased and directed towards fetal growth and mammary development. Increased feed intake after breeding has been presumed to be detrimental to embryo survival; however, data with modern line Sows demonstrates to feed thin Sows to recover body condition as quickly as possible while avoiding feed deprivation immediately after breeding. Importance of body condition scoring remains unchanged: feed thin Sows to bring back to adequate body condition and prevent over-conditioned Sows at farrowing. A recent meta-analysis showed increasing late gestation feed intake seems to modestly improve piglet birth weight by 28 g per piglet in gilts and Sows. Also, recent findings in gestating Sows suggest modern genotypes have improved feed efficiency and propensity for growth. Therefore, increasing energy intake during late gestation has a modest effect on piglet birth weight and a negative effect on stillborn rate. Historically, lactation catabolism impacted subsequent reproductive performance of Sows, particularly in first-parity. However, contemporary Sows appear to be increasingly resistant to the negative effects of lactational catabolism. Even so, continued emphasis on maximizing lactation feed intake is critical to support milk production and prevent excessive lean tissue mobilization. Research data suggests that ad libitum feeding and offering lactation diets during the wean-to-estrus interval is not needed. Modern genetic Sow lines appear to be more robust from a nutritional perspective than in the past.