Delayed age of gilts at first mating associated with photoperiod and number of hot days in humid subtropical areas

Iida, Ryosuke; Koketsu, Yuzo

doi:10.1016/j.anireprosci.2013.04.011

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…In a study considering entire male pigs, Prunier et al [ 19 ] found more skin lesions on entire male pigs in autumn than in spring, attributing this effect to accelerated male pubertal development during autumn. The influence of photoperiod on puberty onset in gilts remains controversial; it seems to play a prominent role in infertility and delayed puberty [ 20 ], but some authors report an earlier age of first mating in gilts exposed to increasing photoperiod [ 21 ] while others support the role of a decreasing photoperiod in attaining earlier puberty [ 22 ].…”

Section: Discussionmentioning

confidence: 99%

Skin lesion monitoring at slaughter on heavy pigs (170 kg): Welfare indicators and ham defects

Bottacini

Scollo²,

Edwards

et al. 2018

PLoS ONE

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In order to evaluate at the slaughterhouse external carcass lesions on heavy pigs (170 kg) as potential welfare indicators, and the prevalence of ham defects determining ham exclusion from Protected Designation of Origin (PDO) markets, 732 pig batches from northern Italy were monitored during a 12-month period, and then processed analysing the effect of slaughter season, overnight lairage, and production type. On the slaughter line, skin scratches were separately scored in the posterior region (defined as the area including the hind legs and the tail) and the anterior one (as the remaining area), while the whole carcass was examined for external hematomas. Chronic ear and tail lesions referable to the rearing phase, and bursitis were recorded as retrospective welfare indicators. The annual median prevalence of carcasses per batch with severe anterior scratches was 64% while 46.4% had severe posterior scratches. The highest autumn score for both skin scratches (P < 0.001) and traumatic ham defects (P = 0.005) is reflected in the positive correlation between severe posterior scratches and ham hematomas (r2 = 0.27; P < 0.001). Overnight lairage batches resulted in higher prevalence for scratches, while among ham defects only veining increased. Among binary records, only ear lesions were frequently recorded (annual median = 10%). A comparison analysis between pigs in and out of PDO circuit was performed to evaluate the variation related to the different genetics, showing differences for ear and tail lesions and for almost all the considered ham defects. The present study confirms that skin lesions represent a problem also for heavy pigs and that overnight lairage and season can affect their prevalence, with the associated possibility to give ham defects. Ear lesions are suitable to be used as retrospective welfare indicator, while tail lesions usage is nowadays limited by the extensive use of tail docking.

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Section: Discussionmentioning

confidence: 99%

Skin lesion monitoring at slaughter on heavy pigs (170 kg): Welfare indicators and ham defects

Bottacini

Scollo²,

Edwards

et al. 2018

PLoS ONE

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“…The results showed that under the temperature of 15–30°C and the light intensity of 11–433 lx, there was no significant difference in the reproductive performance of sows in early pregnancy, but their immune performance was significantly improved (Canaday et al, 2013; Chen et al, 2019; He, Guo, et al, 2019; He, Zheng, et al, 2019; Li et al, 2022). Meanwhile, some scholar found that the infertility of gilts may be mainly caused by the light time of 9–15 h and this negative effect was more serious when gilts were exposed to the high temperature of more than 28°C (Tummaruk, 2013, Iida & Koketsu, 2013a, 2013b, Lemoine, 2013, De Rensis et al, 2017). According to Table 12, it can be concluded that the thermo‐neutral temperature of 20–25°C, the light duration of 8 h and the light intensity of 150–250 lx were the most beneficial environmental conditions for sow oestrus (Prunier et al, 1994; Sousa Júnior et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

“…There was no significant change in the rectal temperature, oestrus rate, ovulation rate and conception rate of sows under high temperature of 30-33.3°C and relative humidity of 80% Brandt et al (2022) The increase of relative humidity from 50% to 70% was equivalent to the increase of effective temperature by 0.9°C in sow houses Wegner et al (2016) Under high THI of 75-84, there was no difference in the stillborn piglet number prior to and on the day of farrowing within 15 days after mating, but the number of liveborn piglets and weaned piglets was reduced by 0.01-0.03 Chen et al (2020) The lactation performance and antioxidant status of sows exposed to high THI were partially improved when Saccharomyces cerevisiae fermentation products were added in their diet F I G U R E 5 Changes of the stillborn and liveborn piglet number prior to and on the day of farrowing under high temperature and humidity index. of gilts may be mainly caused by the light time of 9-15 h and this negative effect was more serious when gilts were exposed the high temperature of more than 28°C (Tummaruk, 2013, Iida & Koketsu, 2013a, 2013b, Lemoine, 2013, De Rensis et al, 2017.…”

Section: Adi Et Al (2022)mentioning

confidence: 99%

A review on the effect of light–thermal–humidity environment in sow houses on sow reproduction and welfare

Xie

et al. 2023

Reprod Domestic Animals

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The environment in sow houses is the key to restrict sow production due to its significant effect on sow growth and reproduction. In this article, the effect of light, thermal and light–thermal–humidity environment in sow houses is systematically reviewed for sow reproduction and welfare according to the existing literature. The results show the optimal ambient temperature range for sows is approximately 16–22°C, as well as the lowest and highest critical temperature are 16 and 27°C respectively. Meanwhile, the increase of relative humidity from 50% to 70% is equivalent to the increase of effective temperature by 0.9°C in sow houses. In addition, the evaluation indexes are summarized to the future research direction is proposed according to the reviewed results. It can be concluded that the current research mainly focuses on the effect mechanism of light–thermal–humidity environment on sow growth and reproductive performance, as well as the optimal regulation range of light–thermal–humidity environment. In particular, it is a popular topic to further study the effect of light–thermal–humidity environment on the genetic material of sows, as well as metabolic parameters and body composition of their offspring. The above conclusions can contribute to guiding the regulation of light–thermal–humidity environment in sow houses and improving the sow welfare.

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Fertility responses of melatonin-treated gilts before and during the follicular and early luteal phases when there are different temperatures and lighting conditions in the housing area

Arend

Knox

2021

Animal Reproduction Science

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Delayed age of gilts at first mating associated with photoperiod and number of hot days in humid subtropical areas

Cited by 7 publications

References 24 publications

Skin lesion monitoring at slaughter on heavy pigs (170 kg): Welfare indicators and ham defects

Skin lesion monitoring at slaughter on heavy pigs (170 kg): Welfare indicators and ham defects

A review on the effect of light–thermal–humidity environment in sow houses on sow reproduction and welfare

Fertility responses of melatonin-treated gilts before and during the follicular and early luteal phases when there are different temperatures and lighting conditions in the housing area

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