255 Effect of Altosid-infused supplement on fly emergence and supplement intake in grazing cattle in Western Canada.
Notice bibliographique
Résumé
Abstract This study evaluated the effect of Altosid®-infused supplement on cattle at Vermilion, AB (VAB) and Brandon, MB (BMB), over 52-d and 74-d, respectively. The study focused on supplement intake, body performance, fly emergence from dung pats, and S-Methoprene (SMP) residual concentrations in feces. Each site had a group of females assigned to either a conventional supplement (Control) or an Altosid-infused supplement (Treated). Cow-calf pairs at VAB (n=50; 25/treatment) and replacement heifers at BMB (n=30; 15/treatment) were randomly assigned to treatment groups. The subjects at each site were weighed on two consecutive days at the start and end of the trials. Ultrasound measures of backfat and rumpfat thickness were collected at the beginning and end of the trial. Each group was assigned an automatic feeding unit to collect supplement intake, which was available ad libitum. At the Vermilion site, 20 random dung samples were collected per group at the start and end of the trial. Fecal samples were collected directly from rectum of each animal at the end of the trial. The residual fecal S-Methoprene concentrations in the dung pats were analyzed from 10 subjects with the greatest average supplement intake. Data was analyzed using PROC MIXED model in SAS, which accounted for treatment effects and treatment × site interaction, with initial BW as covariate. The relationship between supplement intake and fecal SMP residue was assessed using PROC CORR in SAS. Average daily gain and ultrasound measures of body composition did not differ (P > 0.05) between treatments at both sites. The average supplement intake in the Control (0.11 ± 0.05 kg/day) and the Treated (0.22 ± 0.05 kg/day) groups did not differ (P = 0.07) at BMB but were different at VAB where the treated group (0.38 ± 0.03 kg/day) had greater (P < 0.01) average intake compared to the control group (0.11 ± 0.03 kg/day). The average SMP concentrations in the feces were 0.16 ± 0.04 and 0.19 ± 0.05 ppm at VAB and BMB, respectively. The correlation between supplement intake and fecal SMP concentrations was positive but weak in BMB (r = 0.23;p = 0.52) but was moderate (r = 0.50; p = 0.14) for VAB. Before administering SMP treatment, more flies (P = 0.03) emerged from the dung pats sampled from the Treated group (68 ± 11 flies) compared to flies that emerged from the Control group’s (32 ± 11 flies) dung pats. However, after SMP treatment, fewer (p = 0.0007) flies emerged from the Treated group (64 ± 30) compared to the Control group (243 ± 30). The study results show that the Altosid-infused supplements effectively disrupt the lifecycle of flies by reducing the number of emerging flies in manure without adversely affecting cattle performance.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».