Assessing greenhouse gas and ammonia emissions: A comparison of three egg production systems in Québec, Canada
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
In Quebec, the phase-out of the conventional cage (CC) system for egg production, is expected to be completed by 2036, with a transition to alternative systems such as enriched colonies (ECs) and cage-free (CF) housing. This study aimed to assess Greenhouse gas (GHG), and ammoniac (NH3) emissions associated with those systems. The investigation involved one visit per farm to 30 commercial laying hen facilities in Southern Québec, Canada. The findings revealed that the CF system exhibited the highest numerical average of CO2 emissions (3207 ± 2423 mg h-1 hen-1), followed by CCs (2835 ± 877 mg h-1 hen-1) and ECs (2597 ± 949 mg h-1 hen-1). Furthermore, the EC system had the lowest average CH4 emissions (0.93 ± 0.54 mg h-1 hen-1), while CC (1.07 ± 0.41 mg h-1 hen-1) and CF (1.27 ± 1.11 mg h-1 hen-1) facilities had higher values. Emissions of N2O were similar across all three systems (0.04 to 0.05 ± 0.05 mg h-1 hen-1). The study revealed significant differences in NH3 emissions among CC (2.0 ± 1.0 mg h-1 hen-1), EC (2.5 ± 2.0 mg h-1 hen-1), and CF egg production systems (11.2 ± 15.9 mg h-1 hen-1).
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| 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 it