An Analysis of Culling Patterns during the Breeding Cycle and Lifetime Production from the Aspect of Culling Reasons for Gilts and Sows in Southwest China

Wang, Chao; Wu, Yinghui; Shu, Dingming; Wei, Hong; Zhou, Yuanfei; Peng, Jian

doi:10.3390/ani9040160

Cited by 19 publications

(24 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Identifying sow culling reasons may help to resolve this issue by correcting certain practices in pig herds [ 30 ]. Sow longevity is usually decreased because of reproductive issues and lameness [ 31 ]. Sow lameness may be caused by the existence of claw lesions which may co-exist with oversized claws or dewclaws [ 32 ].…”

Section: Discussionmentioning

confidence: 99%

Claw Characteristics of Culled Sows from Three Farrow-to-Finish Greek Farms. Part 1: Claw Length Measurements, Lesion Scores and Their Association

Papadopoulos

Chalvatzi

Kroustallas

et al. 2021

Veterinary Sciences

View full text Add to dashboard Cite

The aim of the study was to investigate variations in lengths and lesions in claws of culled sows and to evaluate their association. All four feet of 185 sows from three Greek farrow-to-finish farms (Farm A: 57 sows; Farm B: 64 sows; Farm C: 64 sows) were examined for lesions and their lengths were measured. All claw lengths were lower in sows of farm C compared to those from sows of B and A. Claw lengths in sows of farm B were lower compared to those from A for all lateral toes of front feet and for all medial and four out of three lateral toes of rear feet. Sum of length measurements of the main toes of the front feet (SLF) associated with lesions on sole, white line and heel of front feet, while sum of length measurements of the main toes of the rear feet (SLR) associated with all lesions of the rear feet. The lengths of the main toes were correlated with the length of dew claws on front and rear feet. Overall, sows’ claw lesion severity and claw lengths may differ between farms and frequency of lesions is higher in longer claws.

show abstract

Section: Discussionmentioning

confidence: 99%

Claw Characteristics of Culled Sows from Three Farrow-to-Finish Greek Farms. Part 1: Claw Length Measurements, Lesion Scores and Their Association

Papadopoulos

Chalvatzi

Kroustallas

et al. 2021

Veterinary Sciences

View full text Add to dashboard Cite

show abstract

“…Sow longevity was measured in terms of parity at culling and productive herd life. Parity at culling (PAC), also called lifespan, is the number of parities a sow has accumulated before culling (Engblom et al, 2007;Hoge & Bates, 2011;Sasaki & Koketsu, 2011;Sobczyńska et al, 2014;Zhao et al, 2015;Wang et al, 2019). Productive herd life (PHL) refers to the number of days from the date of first farrowing to the date of culling or mortality (Hoge & Bates, 2011;Sobczyńska et al, 2014).…”

Section: Data Collection Definitions and Categoriesmentioning

confidence: 99%

“…Sow lifetime efficiency in terms of annualized lifetime pigs born alive (LPBA) and total pigs weaned (TPW) is defined as the sum of pigs born alive (or pigs weaned) in a lifetime (i.e., from first farrowing to the last farrowing) divided by the sow life days and multiplied by 365 days. Lifetime productivity or efficiency is also called lifetime prolificacy by Sasaki & Koketsu (2008), Hoge & Bates (2011), Sasaki & Koketsu (2011), Sobczyńska et al (2014), andWang et al (2019).…”

Section: Data Collection Definitions and Categoriesmentioning

confidence: 99%

“…While the reasons for sow culling are reported mostly to improve the production efficiency of com-mercial herds abroad (e.g., Hoge & Bates, 2011;Sasaki & Koketsu, 2011;Wang et al, 2019), the reasons for removal of purebred sows and their lifetime efficiency in a local nucleus breeding farm are not known. In this regard, the objective of this study is to analyze the distribution of culling type (planned and unplanned) and culling reasons for Landrace and Large White sows in a local nucleus breeding farm.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reasons for Culling in Relation to Longevity and Lifetime Efficiency of Landrace and Large White Sows in a Nucleus Breeding Farm in the Philippines

Bondoc

Isubol²

2022

Trop. Anim. Sci. J.

View full text Add to dashboard Cite

Information on the reasons for sow removal is limited and often unreported for nucleus breeding farms. This study analyzed the distribution of culling type (planned vs. unplanned) and culling reasons in relation to longevity -parity at culling (PAC) and productive herd life (PHL), and lifetime efficiency -lifetime pigs born alive (LPBA) and total pigs weaned (TPW) using data recorded from 2017 to 2019 by a local nucleus breeding farm. The study revealed a considerable amount of unplanned removal (84.1%) compared to planned culls, which is due to old age (11.4%) and poor farrowing performance (4.6%). The most common reasons for unplanned sow removal were reproductive failures (26.2%) and health disorders (23.4%), followed by physical defects (15.3%), leg/foot problems (10.8%), and mortality (8.5%). A high proportion (22.1%) of sows was culled at their first parity. The proportion of culled sows decreased up to parity 4, especially for unplanned sow removals due to reproductive failures, leg/foot problems, and mortality. Unplanned culling corresponded to lower PAC (3.8), PHL (459 days), LPBA (14.1 pigs/year), and TPW (12.4 pigs/year). Average PAC and PHL were significantly higher (p<0.05) for Large White sows (PAC= 5.2; PHL= 696 days) than Landrace sows (PAC= 4.6; PHL= 588 days). However, the LPBA and TPW were not significantly different between breeds. Information about sow removal could be used to develop management strategies to avoid unplanned culling in purebred sows and extend their productive life.

show abstract

“…Our study showed that the culling rate of gilts in LP farm was 14.9%, which was significantly higher than that in HP (9.4%) and IP pig farm (10.4%). The main reasons were undesirable limb configuration, repeated mating infertility and anestrus [ 13 , 15 , 16 ]. Tani et al [ 17 ] suggested that when the age at first mating increased from 220 d to 300 d, the risk of culling of gilts due to reproductive failure increased by 2.1%.…”

Section: Discussionmentioning

confidence: 99%

Utilization and reproductive performance of gilts in large-scale pig farming system with different production levels in China: a descriptive study

et al. 2021

View full text Add to dashboard Cite

Background This study was to investigate the utilization and reproductive performance of gilts in large-scale pig farms. Data of this descriptive study included 169,013 gilts of 1540 gilts’ batches on 105 large-scale pig farms from April 2020 to March 2021. According to the upper and lower 25th percentiles of piglets weaned per sow per year (PSY) during the research stage, pig farms were divided into three productivity groups: high-performing (HP), intermediate-performing (IP) and low-performing (LP) farms. On the basis of breeds, LP (LP-Total) farms was further divided into LP-breeding pig (LP-BP) and LP-commercial pig (LP-CP) groups. Average utilization, estrus and first mating data was collected from a total of 1540 gilts’ batches. The age-related factors (introduction age, age at first estrus and age at first mating) and litter production (total number of piglets, number of piglets born alive and number of weaned piglets, as well as their proportion distribution) among HP and LP groups were compared. The litter production in different age groups were also analyzed. Results The introduction age, mortality and culling rate of HP farms were lower compared with LP farms. Total number of piglets per litter, number of piglets born alive per litter and number of weaned piglets per litter in HP farms were significantly more than those of LP groups, respectively. The proportion distribution peaks of litter production in HP farms were shifted about two more than those in LP groups, respectively; and the proportion of low litter production (eight per litter or less) was lower than that in LP groups. The results of different age groups showed that total number of piglets per litter and number of piglets born alive per litter in 220–279 d were the most, while that of 370 d was the least. Conclusions The overall utilization and reproductive performance of gilts in HP farms was better than those of LP farms. The difference in utilization was reflected in introduction source, culling rate and mortality. While the age at first estrus and first mating, breeds and litter production were the main differences for reproductive performance.

show abstract

An Analysis of Culling Patterns during the Breeding Cycle and Lifetime Production from the Aspect of Culling Reasons for Gilts and Sows in Southwest China

Cited by 19 publications

References 25 publications

Claw Characteristics of Culled Sows from Three Farrow-to-Finish Greek Farms. Part 1: Claw Length Measurements, Lesion Scores and Their Association

Claw Characteristics of Culled Sows from Three Farrow-to-Finish Greek Farms. Part 1: Claw Length Measurements, Lesion Scores and Their Association

Reasons for Culling in Relation to Longevity and Lifetime Efficiency of Landrace and Large White Sows in a Nucleus Breeding Farm in the Philippines

Utilization and reproductive performance of gilts in large-scale pig farming system with different production levels in China: a descriptive study

Contact Info

Product

Resources

About