0092 Effects of ventilation and water misting on the physiological response of pigs kept in a stationary trailer before unloading
Bibliographic record
Abstract
This study aimed at evaluating the effects of ventilation combined with water-misting on the physiological response of pigs kept in the truck during the waiting time before unloading at the slaughter plant. In the summer 2015 (19.7 ± 4.0°C, ranging from 16.5 to 28.1°C), a total of 2674 pigs were transported from a farm to a slaughter plant (2 h trip) using two pot-belly trailers (seven loads of 191 pigs/trailer). On arrival at the plant, the two trailers were kept stationary during a 30 min waiting period before unloading. During this time, one of the two trailers was exposed to external forced ventilation and misting for 30 and 10 min, respectively, using a fan-mister bank located near the unloading dock, while the other trailer (control) was not exposed to any cooling procedure. A total of 168 pigs (24 per trailer) were equipped with a gastro-intestinal tract temperature (GTT) monitor (High Resolution Thermochron iButton) for real-time recording of GTT data. Blood was collected from these pigs at exsanguination for the analysis of cortisol, lactate and creatine kinase concentrations, and hematocrit. Data were analyzed using the mixed model procedure of SAS. A probability level of P ≤ 0.05 was chosen as the limit for statistical significance in all tests. A delta GTT (ΔGTT) was calculated as the difference between the measured GTT at a determined event and the GTT measured at rest. Except for the blood hematocrit level that was lower (P < 0.05) in pigs being exposed to the cooling procedure while waiting in the trailer, the cooling treatment had no effect on any blood parameter. At the end of the wait period and at unloading, the decrease of GTT was greater (higher-ΔGTT value; P < 0.05) in control pigs than in those exposed to the cooling treatment. This result may be explained by the greater heat loss of control pigs due to heat stress. Based on these results, the cooling method applied in this study appears to improve the thermal comfort and reduce dehydration in pigs kept in a stationary truck before unloading at the slaughter plant.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".