281 The Relationship between Postnatal Hormone Concentrations and the Development of Boar Taint at Puberty
Bibliographic record
Abstract
Abstract The development of boar taint is dependent on the balance between the rate of androstenone synthesis and metabolism, which regulates the quantity of androstenone available for accumulation in the fat. The pubertal production of androstenone and other sex steroids is influenced by sexual maturity status and preceded by a significant period of hormone production during postnatal development that occurs from 14 to 35 days of age (DOA). However, the relationship between postnatal and pubertal hormone production is not well understood. Therefore, the purpose of this study was to determine if postnatal hormone concentrations can be used to predict sexual maturity status and boar taint development at puberty. Crossbred [(Yorkshire x Landrace) x Duroc] boars (n=90)] were housed in groups of 10. Blood samples were taken at 14, 21, 28, and 35 DOA and again at 120, 130, and 140kg live weights (LWs) along with backfat samples. Plasma and fat androstenone concentrations were quantified using an androstenone-specific ELISA. Plasma estrone sulfate (E1S) concentrations were determined by RIA and used as an indicator of sexual maturity status. Statistical analysis was performed using Spearman correlation. Several nonlinear monotonic relationships were identified between postnatal and pubertal hormone concentrations and are presented in Table 1. A moderate positive correlation was identified between plasma androstenone concentrations at 21 and 28 DOA and fat androstenone concentrations at 120, 130, and 140kg LWs, and between E1S concentrations at 21 DOA and E1S concentrations at 120, 130, 140kg LWs. However, the strength of the relationship between postnatal and pubertal hormone concentrations was insufficient for accurately predicting sexual maturity status or boar taint at puberty. These results suggest that additional factors regulating the development of boar taint, such as the rate of metabolism or accumulation, should be considered in future efforts to develop a predictive model using postnatal hormone concentrations.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".