ASSESSMENT OF THE PREVALENCE OF CALVING COMPLICATIONS IN COWS AND HEIFERS DEPENDING ON THE PREDICTIVE ABILITY OF BREEDING BULL LINES (ORIGIN CANADA)
Bibliographic record
Abstract
В распространенности дистоций, задержаний последа и мертворождения телят в большей степени участвуют генетические факторы, поскольку показатели заболеваемости у гомозиготных животных выше, чем у коров стада в целом. Поэтому оценка характеристик производителей наиболее эффективна в прогнозировании родовых патологий у коров. Материалом исследования служили данные быков-производителей линий: Рефлекшн Соверинг 0198998, В.Б. Айдиал, Рефлекшн Соверинг 6 и Метза 200. Анализ проводили по отелам у 3482 коров и нетелей в пяти племенных предприятиях Волгоградской, Саратовской и Ленинградской областей. Частота эутоций в исследуемой выборке варьировала от 32,6% до 50,3%, самый низкий процент отмечен у маток, осемененных быками линии В.Б. Айдиал, а самый высокий — в линии Рефлекшн Соверинг 6. Дистоции у коров и нетелей, осемененных спермой быков разных линий, встречались с частотой от 31,6% до 49,5%, где самое низкое значение — у животных линии Метза 200, самое высокое — у особей линии Рефлекшн Соверинг 0198998. Наименьший показатель задержания последа был характерен для линии быка Рефлекшн Соверинг 6 (15,0%), наивысший наблюдался у самок, осемененных спермой быка Метза 200 (22,1%). Самый низкий показатель мертворождения (1,2%) зарегистрирован у коров и нетелей, осемененных спермой быков линии Рефлекшн Соверинг 0198998, самый высокий (2,3%) — у маток, осемененных спермой быков линии Метза 200. Genetic factors are involved in the prevalence of dystocia, placenta retention and stillbirth of calves, because the incidence in homozygous animals is higher than in other cows. Therefore, the evaluation of the characteristics of breeding bulls is most effective in predicting reproductive pathologies in cows. The material was the data of bulls of the lines: Reflection Sovering 0198998, V.B. Idial, Reflection Sovering 6 and Metza 200. The analysis was carried out on calving in 3482 cows and heifers in 5 breeding enterprises of the Volgograd, Saratov and Leningrad regions. The frequency of eutocia in the studied sample ranged from 32.6% to 50.3%, the lowest percentage was observed in queens of the V.B. Ideal line, and the highest in the Reflection Sovering 6 line. Dystocia in cows and heifers inseminated with sperm from bulls of different lines occurred with a frequency from 31.6% to 49.5%, where the lowest value was in animals of the Metza 200 line, the highest was in individuals of the Reflection Sovering 0198998 line. The lowest percentage of placenta retention was found in representatives of the Reflection Sovering 6 line (15.0%), the highest was in animals of the Metza 200 line (22.1%). The lowest stillbirth rate (1.2%) was recorded in cows and heifers of the Reflection Sovering 0198998 line, the highest (2.3%) — in queens of the Metza 200 line.
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 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 | 0.001 | 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 | 0.001 | 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".