Logistic regression analysis of the related factors in discarded semen of boars in Southern China

Wang, Chao; Guo, Liangliang; Wei, Hong; Zhou, Yuanfei; Tan, Jiajian; Sun, Haiqing; Jiang, Siwen; Peng, Jian

doi:10.1016/j.theriogenology.2019.03.012

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…Some studies have pointed out differences between Duroc boars and other breeds in seminal parameters (volume, concentration, motility, viability, etc.) [31][32][33][34], testosterone concentration [35], and proportion of discarded semen samples in AI centers [36]. Interestingly, Tremoen et al [37] reported a higher proportion of hyperactivated spermatozoa in Duroc samples than landrace at day 0 of storage.…”

Section: Discussionmentioning

confidence: 99%

Photo Stimulation of Seminal Doses with Red LED Light from Duroc Boars and Resultant Fertility in Iberian Sows

Crespo

Martínez²,

Gadea

2021

Animals

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In pigs, it has been reported that increased farrowing rates and litter size have been induced by photostimulating the seminal doses for artificial insemination with red LED light. As the reproductive characteristics, production system, and outcome parameters of Iberian breed pigs are different from other commercial breeds, the aim of this study was to evaluate the possible effect of illuminating seminal doses from Duroc boars with red LED light and the fertility outcomes of Iberian females. Semen samples were obtained from 38 fertile Duroc boars. Photostimulation of the artificial insemination (AI) seminal doses was carried out by illuminating the samples with a red LED for 10 min, followed by 10 min of darkness, and finally 10 additional minutes of red light. The fertility study was conducted on two commercial farms using multiparous Iberian sows (farm A, n = 824; farm B, n = 2131), that were randomly assigned to LED (L) or control (C) groups. No differences were found between L and C groups in both farms (p > 0.05) for parity, pregnancy rate, duration of pregnancy, farrowing rate, and litter size (total, alive, and stillborn piglets). Farrowing rates in farm A were 88.8% (n = 383) for control and 89.6% (n = 441, p = 0.67) for the LED group. In farm B, farrowing rates were C:90.5% (n = 1030) and L: 90.1% (n = 1101, p = 0.48). In farm A, total born piglets were 8.69 ± 0.11 for C and 8.71 ± 0.11 for L (p = 0.87). In farm B, the results were 8.72 ± 0.7 for C and 8.70 ± 0.06 (p = 0.82) for L. Under the production conditions for the Iberian breed, the photostimulation with red LED light using Duroc pig seminal doses was not effective in improving the fertility of Iberian sows.

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Section: Discussionmentioning

confidence: 99%

Photo Stimulation of Seminal Doses with Red LED Light from Duroc Boars and Resultant Fertility in Iberian Sows

Crespo

Martínez²,

Gadea

2021

Animals

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“…Fluctuations in daylight are considered the main environmental factor influencing the reproductive performance in pigs [41,44,45]. In fact, daylight fluctuation is one of the main causes for discarding ejaculates in AI boars, finding the highest proportions of unusable ejaculates, due to poor sperm quality, during the annual period with decreasing daylength [46,47]. However, the ambient temperature is an additional factor, since it basically follows ambient daylight and is a major problem when dealing with the comfort of the pigs under production.…”

Section: Discussionmentioning

confidence: 99%

Period of Boar Ejaculate Collection Contributes to the Yearly Intra-Male Variability of Seminal Plasma Cytokines

Padilla

Lucas

Parrilla

et al. 2020

Biology

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The concentrations of cytokines in seminal plasma (SP) fluctuate over time in healthy males, weakening their practical usefulness as diagnostic tools. This study evaluated the relevance of intra-male variability in SP cytokines and to what extent the period of the year when ejaculate is collected contributes to such variability. Thirteen cytokines (GM-CSF, IFNγ, IL-1α, IL-1β, IL-1ra, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12, IL-18, and TNFα) were measured using the Luminex xMAP® technology for 180 SP samples of ejaculate collected over a year from nine healthy and fertile boars. The SP samples were grouped into two annual periods according to decreasing or increasing daylight and ambient temperature. Intra-male variability was higher than inter-male variability for all cytokines. All SP cytokines showed concentration differences between the two periods of the year, showing the highest concentration during the increasing daylength/temperature period, irrespective of the male. Similarly, some cytokines showed differences between daylength/temperature periods when focusing on their total amount in the ejaculate. No strong relationship (explaining more than 50% of the total variance) was found between annual fluctuations in SP-cytokine levels and semen parameters. In conclusion, the period of the year during which ejaculates were collected helps explain the intra-male variability of SP-cytokine levels in breeding boars.

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“…The signi cance P < 0.05 of "Hosmer-Lemeshaw test" indicated that the research variables t well with the Logistic model, otherwise, the research variables should be removed from the model. The model formulated as follow [21]:…”

Section: Binary Univariate Logistic Regression Analysismentioning

confidence: 99%

Divergent indicator changes in different exercise states in non-hypertensive individuals and patients with hypertension

Zhang¹,

Xu²,

Gao³

et al. 2023

Preprint

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Background Hypertension is a kind of clinical syndrome, characterized by the increase of systemic arterial pressure. There is a lack of identifiable triggers and predictors of hypertensive disease in response to treatment at rest and during exercise. In this study, a mathematical model was used to screen and compare the indicators and related changes at rest and during exercise between normotensive and hypertensive individuals. Methods Blood pressure and ultrasound-related indicators, blood biochemical indicators and metabolic compounds were collected and logistic regression model and Principal component analysis (PCA) were used to explore the differences of indexes at rest and in different exercise states in healthy and hypertensive patients. An indicator change map for hypertension is established. Results The results reveal that hypertension is not only related to oxidative stress, inflammatory reaction and fatty acid oxidation, but also involves various amino acid metabolism. The defined mathematical models and indicators changes during exercise might be helpful for early screening of hypertension and future studies are needed to explore their value on prevention and control of hypertension. Conclusion The research shows that the main regulation indicators at different exercise states differ significantly in the normal group and the hypertensive group. The key indicators of the normal group are blood pressure and ultrasound related indicators, while those of the hypertensive group are metabolites related to lactic acid metabolism, glycolysis, aerobic oxidation and lipid metabolism.

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Logistic regression analysis of the related factors in discarded semen of boars in Southern China

Cited by 6 publications

References 29 publications

Photo Stimulation of Seminal Doses with Red LED Light from Duroc Boars and Resultant Fertility in Iberian Sows

Photo Stimulation of Seminal Doses with Red LED Light from Duroc Boars and Resultant Fertility in Iberian Sows

Period of Boar Ejaculate Collection Contributes to the Yearly Intra-Male Variability of Seminal Plasma Cytokines

Divergent indicator changes in different exercise states in non-hypertensive individuals and patients with hypertension

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