The occurrence of decreased numbers of pigs born alive in parity 2 sows does not negatively affect herd productivity in Japan

Saito, Hikari; Sasaki, Yosuke; Hoshino, Yuko; Koketsu, Yuzo

doi:10.1016/j.livsci.2009.10.014

Cited by 16 publications

(9 citation statements)

References 7 publications

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“…Morrow et al (1992) reported that 41% of the herds and 54% of the females farrowed litters of smaller or equal size in the second birth. In Brazilian and Japanese herds, there are reports of 55.5% (Schenkel et al, 2005) and 49.5% (Saito et al, 2010) of sows, respectively, with a reduced number of born piglets, from the first to the second farrowing.…”

Section: Introductionmentioning

confidence: 99%

Body reserve mobilization during lactation in first parity sows and its effect on second litter size

et al. 2010

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The aim of this study was to evaluate the influence of sow body reserves at weaning and body reserve losses during the first lactation on the second litter size (SLS). A number of 1222 females which reached the second parity without failures such as return to estrus after insemination, abortion or failure to farrow, were analyzed. Measurements of body weight (BW), backfat thickness (BT) and body condition score (BCS) were taken within 24 h after farrowing and on the weaning day. Body fat and body protein mass at first weaning and their losses during lactation were estimated based on BW and BT. The lactation length, the weaningto-estrus interval (WEI) and the number of weaned piglets were on average 19.6 days, 5.5 days and 10.5 piglets, respectively. During lactation, the sows had on average a reduction of 18.6 kg (9%) in BW, 3.1 mm in BT and 0.8 in BCS. In the first and second farrowings there were on average 12.4 and 9.7 total born piglets, respectively. Females with more than 178 kg, BT ≥ 16 mm or body fat ≥ 21% at weaning had a higher SLS (P b 0.05). Sows with a lipid:protein ratio at weaning N 1.40 had more piglets (P b 0.05) than those with a ratio b 1.22. Females in the categories of high BCS (≥ 3.0) or high body protein (N 15%) at weaning had more piglets in the second birth compared to females with a BCS ≤ 2 or body protein ≤ 14% (P b 0.05). Smaller SLS (P b 0.05) was observed in sows with a weight loss N 10%, body protein loss N 10%, body fat loss N 20% or a BCS loss ≥ 1.0 point. When sows were categorized into two groups of BW at farrowing-low (167-206 kg) or high (207-245 kg), higher SLS (P b 0.05) was observed in sows losing more than 8% of BW or 9% of protein mass. The loss of b 22% in fat mass increased the SLS in sows of high BW (P b 0.05) but not in those of low BW at farrowing. In conclusion, SLS is affected by absolute body reserves at weaning and by their mobilization during lactation indicating the importance of achieving an adequate body condition at parturition and of optimizing the feed intake in lactating primiparous sows.

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Section: Introductionmentioning

confidence: 99%

Body reserve mobilization during lactation in first parity sows and its effect on second litter size

et al. 2010

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“…As a consequence, the so‐called second parity syndrome, characterized by reproductive failures such as anestrus, reduced farrowing rate and low litter size (Saito et al. ; Hoving et al. ), may lead to subsequent culling (Lucia et al.…”

Section: Discussionmentioning

confidence: 99%

Presence of Leptin and Its Receptor in the Hypothalamus, Uterus and Ovaries of Swine Females Culled with Distinct Ovarian Statuses and Parities

Moreira

Gheller

Mondadori

et al. 2014

Reprod Domestic Animals

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Leptin acts on energy metabolism, affecting reproductive functions through activation of its receptors in the brain and in reproductive organs. This study compared the presence of leptin and its receptor (ObR-b) in hypothalamus neurons, endometrial glands and oocytes of culled swine females across ovarian statuses and parities. Immunohistochemistry was done in samples of uterus, ovaries and hypothalamus from 28 culled females, using polyclonal antibodies antileptin and ObR-b. Immunolabelling was compared for sows categorized by parity at culling (0, 1, 2-4 and <4) and ovarian status (luteal and follicular phases of the oestrous cycle and with cysts). Immunolabelling for leptin and ObR-b in neurons and oocytes was weaker in females with cysts (p < 0.05) than in those at the follicular phase. In endometrial glands, leptin immunolabelling was less intense in females with cysts (p < 0.05), but immunolabelling for ObR-b was similar across ovarian statuses (p > 0.05). In sows culled with 2-4 parities, leptin immunolabelling in neurons and endometrial glands was more intense than in nulliparous females (p < 0.05). In comparison with sows culled at greater parities, ObR-b immunolabelling for nulliparous females was less intense in endometrial glands and in oocytes (p < 0.05), but more intense in neurons (p < 0.05). Thus, in swine, the presence of leptin and ObR-b varies across parities and is more intense in the uterus, ovaries and hypothalamus of females that were cycling before culling than in those having cystic ovaries.

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“…SNBA was defined as the sum of the number of piglets born alive in the first and second parity (Saito et al 2010). Lifetime productivity was calculated as the total number of piglets born alive (LBA) from first to last farrowing.…”

Section: Methodsmentioning

confidence: 99%

“…The decrease or increase in litter size at second parity is binomial trait; however, litter size decrease in parity 2 sows (Sasaki et al 2011). The summed number of pigs born alive in parities 1 and 2 (SNBA) is an alternative measure of prolificacy of sows and it was reported to be related with a reduction of the number of piglets born alive in parity two at the sow level (Saito et al 2010). Furthermore, Sasaki et al (2011) reported the effect of quantitative difference in the number of piglets born alive between parity one and two (DNBA) and SNBA on lifetime piglets born alive, lifetime nonproductive days, and number of parity at culling and piglets born alive per sow per year.…”

Section: Introductionmentioning

confidence: 99%

“…A few studies have reported on the effect of DNBA and SNBA on lifetime productivity of sows (Saito et al 2010, Sasaki et al 2011 and none in tropical conditions. It might be possible to increase reproductive and productive performance of sows and herds by determining the critical value of DNBA and SNBA for sow lifetime performance, which may help in making decisions and choose management practices that increase the amount of pigs born alive in swine production systems.…”

Section: Introductionmentioning

confidence: 99%

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Effect of reduced or increased number of pigs born alive at second farrowing on lifetime productivity of sows in southeastern Mexico

2016

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Effect of reduced or increased number of pigs born alive at second farrowing on lifetime productivity of sows in southeastern MexicoEfecto de la reducción o incremento del número de cerdos nacidos vivos en el segundo parto en la vida productiva de las cerdas en el sureste de México JE Ek-Mex * , JC Segura-Correa, A Alzina-López ABSTRACT. The objective of this study was to determine the effect of the change in litter size between parity one and two (DNBA) and by summed number of pigs born alive in parity one and two (SNBA) on lifetime productivity of sows in four pig farms in the tropics of Mexico. Data from 6,046 sows, with information on lifetime piglets born alive (LBA), length of productive life (LPL), number of parity at culling (NP) and piglets born alive per year (PBY), were used. Sows were categorised into 11 DNBA groups: ≤ -5,-4, -3, -2, -1, 0, +1, +2, +3, +4 and ≥ +5 piglets, and 5 SNBA group: ≤ 17, 18 to 20, 21 to 22, 23 to 25 and ≥ 26 piglets. A positive linear trend was observed for LBA, LPL and PBY for sows that decreased in ≤ 5 piglets to sows that increased in ≥ 5 piglets. Sows with greater SNBA stay longer in the herd and produced more piglets during their productive lifetime. Sows that increased litter size at second parity and those that produce more piglets in their two first parities were more productive.Key words: piglets, second parity, reproduction, sows. RESUMEN.El objetivo de este estudio fue determinar el efecto del cambio en el tamaño de la camada entre el parto uno y dos (DNBA) y por la suma del número de cerdos nacidos vivos en el parto uno y dos (SNBA) sobre la vida productiva de las cerdas en cuatro granjas porcinas en el trópico de México. Se utilizaron los datos de 6.046 cerdas, con información sobre los lechones nacidos vivos por vida productiva (LBA), la duración de la vida productiva (LPL), número de partos a la eliminación (NP) y lechones nacidos vivos por año (PBY). Las cerdas fueron clasificadas en 11 grupos DNBA: ≤ -5, -4, -3, -2, -1, 0, 1, 2, 3, 4 y ≥ 5 lechones, y 5 del grupo SNBA: ≤ 17, de 18 a 20, 21 a 22, 23 a 25 y ≥ 26 lechones. Se observó una tendencia lineal positiva de LBA, LPL y PBY para cerdas que disminuyeron en ≤ 5 lechones a cerdas que aumentaron en ≥ 5 lechones. Las cerdas con mayor SNBA permanecen más tiempo en la granja y produjeron más lechones durante su vida productiva. Las cerdas que aumentaron el tamaño de camada al segundo parto y las que tuvieron más lechones en sus dos primeros partos fueron más productivas.Palabras clave: lechones, segundo parto, reproducción, cerdas.

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The occurrence of decreased numbers of pigs born alive in parity 2 sows does not negatively affect herd productivity in Japan

Cited by 16 publications

References 7 publications

Body reserve mobilization during lactation in first parity sows and its effect on second litter size

Body reserve mobilization during lactation in first parity sows and its effect on second litter size

Presence of Leptin and Its Receptor in the Hypothalamus, Uterus and Ovaries of Swine Females Culled with Distinct Ovarian Statuses and Parities

Effect of reduced or increased number of pigs born alive at second farrowing on lifetime productivity of sows in southeastern Mexico

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