PSV-14 Antioxidant status and reproductive performance of sows supplemented with high levels of selected vitamins and trace minerals during the peri-ovulatory period
Bibliographic record
Abstract
Abstract The present study evaluated the use of high levels of selected trace minerals and vitamins with antioxidant properties to alleviate the peri-ovulatory oxidative burst in sows and improve within-litter homogeneity. Seventy four Yorkshire-Landrace multiparous sows were used in a completely randomized arrangement with two dietary treatments: CTR: regular gestation diet or; TRT: regular gestation diet supplemented with supranutritional levels of copper, manganese, selenium, vitamins A, E, B6, and C (Table 1). Blood samples were collected eight days before the predicted oestrus (d13), the day after the onset of oestrus (d21), and five days later (d26) for the determination of plasma concentrations of retinol, pyridoxal-5-phosphate, copper, and selenium as well as protein carbonyl and 8-hydroxyguanosine (markers of oxidative stress) and the activity of the antioxidant enzymes superoxide dismutase, glutathione peroxidase, and catalase in plasma. Sows reproductive performance (body weight, backfat depth, litter size, stillbirth, piglets birthweight, litter homogeneity) was assessed. Plasma selenium and pyridoxal-5-phosphate concentrations were similar between treatments at d13, increased significantly for TRT at d21 and decreased to CTR levels by d26 (P ≤ 0.01). No effect of treatment was detected on plasma retinol and copper concentrations (P ≥ 0.61). No effect of treatment was detected on plasma superoxide dismutase and catalase activities (P ≥ 0.52). Although not statistically different (P = 0.11), glutathione peroxidase activity increased almost 10 % from d21 to d26 in TRT sows compared to less than 3 % in the CTR group. No effect of treatment was detected on plasma protein carbonyl and 8-hydroxyguanosine concentrations (P ≥ 0.23). However, time effects were detected. Plasma copper concentrations were not different between d13 and d21 but decreased at d26 (P = 0.06) whereas plasma retinol concentrations were lowest at d13 and did not differ between d21 and d26 (P = 0.03). Plasma superoxide dismutase activity was lowest at d13, highest at d21, intermediary at d26 (P < 0.01) whereas plasma glutathione peroxidase activity was lowest at d21 and did not differ between d13 and d26 (P < 0.01) and plasma catalase activity was not different between d13 and d21 but increased at d26 (P = 0.04). Plasma protein carbonyl concentrations was highest at d13 and did not differ between d21 and d26 (P < 0.01). Plasma 8-hydroxyguanosine concentrations were not different between d13 and d21 but decreased at d26 (P = 0.01). No effect of treatment was detected on sows reproductive performance (P ≥ 0.17). In conclusion, although supplementation of trace minerals and vitamins with antioxidant properties at high dietary levels enhanced the plasma concentration of some of these nutrients, it had little impact on the modulation of the antioxidant system during the peri-ovulatory period, which apparently did not induce systemic oxidative stress multiparous sows.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".