Preweaning Mortality Risks and Recorded Causes of Death Associated with Production Factors in Swine Breeding Herds in Japan

Koketsu, Yuzo; Takenobu, Shougo; Nakamura, Ryôkô

doi:10.1292/jvms.68.821

Cited by 37 publications

(47 citation statements)

References 11 publications

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“…The positive correlation between PRWM and PBA is in line with a previous study 8) . As the number of PBA increased, the number of weak piglets that could not survive during suckling stage may also increase, resulting in higher PRWM.…”

Section: )supporting

confidence: 93%

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A Survey on Profitability and Productivity Variables and Their Component Analysis in Farrow-to-Finish Swine Farms in Japan

Yamane¹,

Ishizeki²,

Yamazaki³

2013

JVE

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SummaryThis study was conducted to create a new benchmarking system for farrow-to-finish swine farms in Japan. Descriptive statistics of the profitability and production variables were calculated using data obtained from 94 farrow-to-finish swine farms in 2010. The mean values±SD for crude profit, carcass weight, price of marketed carcasses, and feed price were $4,633/sow±861, 1,608 kg/sow± 184, $5.47/kg±0.31, and $0.51/kg±0.05, respectively. The mean values±SD for pigs weaned per mated female per year, litters per mated female per year, and pigs born alive per litter (PBA) were 23.0/(female·year)±2.19, 2.33/(female・year)±0.12, and 10.79/litter ±0.79, respectively. The postweaning mortality risk was positively correlated with feed conversion rate (P＜0.01) and the preweaning mortality risk was positively correlated with PBA (P＜0.01). A sensitivity analysis was simulated within a production tree and the price of marketed carcass had the greatest effects on crude profit per farm. The present benchmarking system is useful in identifying weakness within the farm production system and the estimated financial returns from improvements in production variables could encourage farmers to achieve better production efficiencies.

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Section: )supporting

confidence: 93%

“…Many studies have been conducted using benchmarking data, some have described target values for swine producers 6,9) and others have investigated the factors associated with productivity 8,12) . Studies on benchmarking data in Japan commonly use a computerized data system PigCHAMP ® , the same software widely used in the U.S. 4,5) .…”

Section: Introductionmentioning

confidence: 99%

A Survey on Profitability and Productivity Variables and Their Component Analysis in Farrow-to-Finish Swine Farms in Japan

Yamane¹,

Ishizeki²,

Yamazaki³

2013

JVE

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“…One limitation of this study is that the initial body weight of the piglets was measured at day 4 after birth instead of at birth. We chose to begin our observations at day 4 to minimize the effect of piglet death, which mostly occurs within three days after birth (Koketsu et al 2006), on our data set. However, our initial body weights are not actual birth weights.…”

Section: Discussionmentioning

confidence: 99%

Body Surface Temperature of Suckling Piglets Measured by Infrared Thermography and Its Association with Body Weight Change

Sasaki

Furusho

Ushijima

et al. 2016

JARQ

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a These authors contributed equally to this work. AbstractThe aim of this study was to quantify the body surface temperature of suckling piglets, and determine the association between body surface temperature, body weight and growth rate during the suckling period. The study population consisted of 72 piglets from six sows that were randomly selected at day 4 after farrowing. Infrared thermography and weighing were performed every other day from day 4 to 24 of lactation. Thermal images of each piglet were taken at the eye, base of ear, back, and anus using a handheld infrared camera. Body surface temperature was associated with piglet age and growth rate (P < 0.05), but not with body weight. At day 14, the body surface temperature was highest in all regions (P < 0.05), while at day 24 the piglets averaged lower body surface temperatures than at days 4-18 (P < 0.05). The interaction between piglet age and growth rate significantly affected body surface temperature (P < 0.05). The body surface temperature only varied with growth rate in piglets 12 and 14 days old after birth (P < 0.05). In conclusion, infrared thermography might be useful for the detection of body surface temperature that can be used as an indication of growth performance in piglets with health problems.

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“…A recording software system [6] was used to monitor the performance of the lactating sows. Approximately 90% of the female pigs on this farm were F 1 crossbreds of Large White and Landrace pigs.…”

Section: Farmmentioning

confidence: 99%

“…Eating behaviors during lactation may also be associated with reproductive performance because a higher feed intake in lactating sows is associated with a shorter WMI and heavier piglet weight [4]. Postural behavior changes may be associated with piglet mortality because piglets remain close to the sow and are at high risk of being crushed when the sow changes her posture [6,15]. Postural behaviors include standing, lying and sitting behaviors.…”

mentioning

confidence: 99%

A Field Study of the Associations between Behaviors and Reproductive Performance in Lactating Sows

Tanaka

Koketsu

2007

The Journal of Veterinary Medical Science

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ABSTRACT. The present study examined factors associated with suckling, eating and postural behaviors (standing, lying and sitting) and the relationships between sow behaviors and reproductive performance. A commercial farrowing-to-finish farm with approximately 300 female pigs was visited eight times for 3 years to record sow behaviors using time-lapse video recorders for 24 hr. The lactational and postweaning reproductive performances of each sow were recorded using a recording software system. Statistical models were built to investigate the factors associated with each behavior. Regression analyses were performed to determine the associations between behavior measurements and adjusted 21-day litter weights (A21d-Wt), weaning-to-first-mating intervals (WMI) and occurrence of ≥ 2 dead piglets during lactation. The means of suckling intervals and frequency of postural changes of the 145 recorded sows were 47.5 ± 0.59 min and 86.8 ± 2.97, respectively. As parity increased from 1 to ≥ 4, the suckling interval and total standing duration increased (P<0.05). The number of nursing piglets and observation days 4 to 21 of lactation were not associated with the suckling intervals. A longer duration of lactation was associated with a longer total standing duration and a higher frequency of postural changes (P<0.05). Shorter suckling intervals were associated with heavier A21d-Wt (P<0.05). Each change in postural behavior increased the likelihood of occurrence of ≥ 2 dead piglets during lactation (P<0.05). No postural or suckling behaviors were associated with WMI. Eating behavior was not associated with any reproductive performance. In conclusion, sow behaviors during lactation were related to lactational performance but were not related to postweaning reproductive performance.

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Preweaning Mortality Risks and Recorded Causes of Death Associated with Production Factors in Swine Breeding Herds in Japan

Cited by 37 publications

References 11 publications

A Survey on Profitability and Productivity Variables and Their Component Analysis in Farrow-to-Finish Swine Farms in Japan

A Survey on Profitability and Productivity Variables and Their Component Analysis in Farrow-to-Finish Swine Farms in Japan

Body Surface Temperature of Suckling Piglets Measured by Infrared Thermography and Its Association with Body Weight Change

A Field Study of the Associations between Behaviors and Reproductive Performance in Lactating Sows

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