A repeatability assessment of sows mated 4–6 days after weaning in breeding herds

Hoshino, Yuko; Koketsu, Yuzo

doi:10.1016/j.anireprosci.2007.06.029

Cited by 29 publications

(29 citation statements)

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“…Sows with prolonged WMI have lower FR and fewer PBA than those with WMI 3–6 days [32, 33]. The WMI tends to be increased by short lactation length and low feed intake during lactation [10].…”

Section: Reviewmentioning

confidence: 99%

Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds

2017

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We review critical factors associated with reproductive performance of female breeding pigs, their lifetime performance and herd productivity in commercial herds. The factors include both sow-level and herd-level factors. High risk sow-level groups for decreasing reproductive performance of female pigs are low or high parity, increased outdoor temperature, decreased lactation feed intake, single inseminations, increased lactation length, prolonged weaning-to-first-mating interval, low birth weight or low preweaning growth rate, a few pigs born alive at parity 1, an increased number of stillborn piglets, foster-in or nurse sow practices and low or high age at first-mating. Also, returned female pigs are at risk having a recurrence of returning to estrus, and female pigs around farrowing are more at risk of dying. Herd-level risk groups include female pigs being fed in low efficiency breeding herds, late insemination timing, high within-herd variability in pig flow, limited numbers of farrowing spaces and fluctuating age structure. To maximize the reproductive potential of female pigs, producers are recommended to closely monitor females in these high-risk groups and improve herd management. Additionally, herd management and performance measurements in high-performing herds should be targeted.

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Section: Reviewmentioning

confidence: 99%

Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds

2017

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“…In the present study, the highest NPD was found in parity 1 sows among the parities 0 to 4 groups, and the proportion of parity 1 sows was >16% of the age structure of the herds [10]. Prolonged NPD in parity 1 sows, which is related to a prolonged weaning-toconception interval [4], can be improved by increasing the feed intake of lactating sows [5].…”

Section: Discussionmentioning

confidence: 79%

By-Parity Nonproductive Days and Mating and Culling Measurements of Female Pigs in Commercial Breeding Herds

Koketsu

Sasaki

2009

The Journal of Veterinary Medical Science

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ABSTRACT. The objectives of this study were to determine by-parity nonproductive female days (NPD or NPDs) and mating and culling measurements, to determine correlations between by-parity NPDs, mating and culling measurements and herd productivity measurements, and to compare by-parity NPDs between three herd groups (105 herds) with differing reproductive productivities. NPD was defined as the number of days when mated females were neither gestating nor lactating. Correlation analysis and mixed-effects models were performed. On the basis of the 25th and 75th percentiles of pigs weaned per mated female per year, three herd groups were formed: high-, intermediate-, and low-performing herds. The mean NPD of 105 breeding herds (mean ± SEM) was 52.7 ± 1.6 days. The NPDs in parities 1, 6 and ≥ 7 were higher than those in parities 0, 2, 3 and 4 (P<0.05). High-performing herds had a higher farrowing percentage and lower percentage of reserviced females than low-performing herds (P<0.05). Lower by-parity NPDs were correlated with lower percentages of reserviced females, higher farrowing percentages and lower culling rates from parities 1 to 5 (P<0.05). High-performing herds had NPDs that were > 25 days lower in parities 0 to 3 than low-performing herds (P<0.05). High-performing herds had lower culling rates in parities 2 to 5 and higher culling rates in parities 6 and ≥ 7 than low-performing herds (P<0.05). The present study indicates that monitoring the by-parity NPD and mating and culling measurements is a good tool for improvement of herd productivity.

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“…In addition, the LE sows in all herd groups had a pattern of decreasing PBA across parity. Sows with prolonged WMI (e.g., 7-20 days) have often been reported to have short estrus duration and suboptimal insemination timing, and so consequently have a low farrowing rate and low PBA [1,3,4]. Additionally, parity 1 sows with prolonged WMI had lower lifetime piglet production and shorter productive life than those with short WMI [16].…”

Section: Discussionmentioning

confidence: 94%

“…There were no birth date records for 1,326 of these sows, so they were excluded from the present study. In addition, sows with weaning-to-1st-mating interval (WMI)  115 days (71 parity records) were omitted as extremes [3], and sows with no weaned pigs (51 parity records) were also omitted when by-parity reproductive performance was analyzed. A percentage (mean  SEM) of excluded sow records of the collected 101 herd data was 3.7  0.10%.…”

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confidence: 99%

Swine Herds Achieve High Performance by Culling Low Lifetime Efficiency Sows in Early Parity

Takanashi

McTaggart

Koketsu

2011

The Journal of Veterinary Medical Science

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ABSTRACT. Sow lifetime performance and by-parity performance were analyzed using a 3 by 3 factorial design, comprising 3 herd productivity groups and 3 sow efficiency groups. Data was obtained from 101 Japanese herds, totaling 173,526 parity records of 34,929 sows, for the years 2001 to 2006. Sows were categorized into 3 groups based on the lower and upper 25th percentiles of the annualized lifetime pigs born alive: low lifetime efficiency sows (LE sows), intermediate lifetime efficiency sows or high lifetime efficiency sows. Herds were grouped on the basis of the upper and lower 25th percentiles of pigs weaned per mated female per year, averaged over 6 years: high-, intermediate-or low-performing herds. Mixed-effects models were used for comparisons. LE sows in high-performing herds had 57.8 fewer lifetime nonproductive days and 0.5 earlier parity at removal than those in low-performing herds (P<0.05). The number of pigs born alive of LE sows continuously decreased from parity 1 to 5, whereas those of high lifetime efficiency sows gradually increased from parity 1 to 4 before decreasing up to parity  6 (P<0.05). In conclusion, the LE sows have a performance pattern of decreasing number of pigs born alive across parity. The present study also indicates that high-performing herds culled potential LE sows earlier than the other herds.KEY WORDS: herd management, lifetime efficiency, sow, suboptimal performance.J. Vet. Med. Sci. 73(11): 1405-1409, 2011 Improving lifetime productivity of sows is critical for producers and veterinarians to achieve high herd productivity over an extended period [8]. However, many commercial herds contain subpopulations of sows with suboptimal reproductive performance [14]. For example, a recent study of 92 herds in Japan showed that up to 84.2% of sows in the herds were culled before parity 5, due mainly to reproductive failure [11]. Early culling of sows will result in low lifetime efficiency sows (LE sows). Normally LE sows are identified retrospectively using annualized lifetime pigs born alive (annualized lifetime PBA) [11]. In order to improve herd productivity it is necessary to investigate characteristics of possible LE sows in earlier parities and improve management of those sows. The characteristics or profiles of LE sows across parity can be determined by comparing reproductive performance between the LE sows and intermediate lifetime efficiency sows (IE sows) or high lifetime efficiency sows (HE sows).Previous studies have shown that high-performing herds based on pigs weaned per mated female per year, have better mating and culling management of sows than ordinary herds [7,14]. Therefore, performance measurements of high-performing herds could also be used as feasible targets for producers and veterinarians [6]. In order to clarify how differences in herd management affect sow lifetime efficiency, there are needs to be a direct comparison between high-, intermediate-and low-performing herds for sow efficiency groups (LE, IE and HE sows). However, no such study of reproduct...

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A repeatability assessment of sows mated 4–6 days after weaning in breeding herds

Cited by 29 publications

References 13 publications

Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds

Factors for improving reproductive performance of sows and herd productivity in commercial breeding herds

By-Parity Nonproductive Days and Mating and Culling Measurements of Female Pigs in Commercial Breeding Herds

Swine Herds Achieve High Performance by Culling Low Lifetime Efficiency Sows in Early Parity

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