Investigations on age and breed-associated differences in energy intake,\ngrowth rate, body composition, haematological and biochemical values of\nLabrador Retrievers and Miniature Schnauzers fed different dietary levels of\nvitamin A
Notice bibliographique
Résumé
Balanced nutrition ensuring adequate intakes of energy, protein, minerals and\nvitamins is essential for the optimal development of young dogs. An adequate\nenergy supply of growing dogs is critical in controlling the growth rate.\nResearch in rodents indicates that dietary vitamin A impacts energy\nutilisation; the potential impact on the energy metabolism in dogs and\nconsequently on the energy intake, body composition and growth velocity in\ngrowing dogs however remains unclear. The literature survey in Chapter 2\nindicates that the definition of healthy growth is difficult and\ncontroversial. The assessment of ideal body condition of growing dogs is more\ndifficult compared to adult animals because increased energy intake results in\nincreased growth rate, but not necessarily in increased body fat mass.\nGuidance values for energy intake and body weight development do exist,\nhowever considerable variability can be observed between breeds. The overview\nof studies investigating breed and age related changes in haematological and\nblood chemical values during growth clearly shows that prominent changes\noccur. Therefore results obtained from puppies have to be interpreted with\ncare to correctly assess the health status as values may deviate from values\nfound in adult dogs. Chapter 3 explains the main aims and hypotheses of this\nthesis. The main work of the current thesis consists of two published\nmanuscripts summarized in Chapter 4 and 5. In the first manuscript the\npossible effects of different dietary vitamin A concentrations on energy\nintake, growth rate and body composition in Labrador Retriever and Miniature\nSchnauzer puppies have been evaluated. However, based on the well-documented\nhigh tolerance of dogs to dietary vitamin A levels up to 104.8 μmol retinol\n(100 000 IU vitamin)/4184 kJ (1000 kcal) it was hypothesized that energy\nintake and accumulation of body fat would be unaffected (Chapter 4). This was\nconfirmed by the results of our study. Given the findings of Morris et al\n(2012), vitamin A was not considered as a factor in the evaluation of the\nhaematological and biochemical data in the second manuscript (Chapter 5). The\nmain interest of the second manuscript was to increase the knowledge on breed,\nsex and age effects and their interaction during the first year of life. The\nevaluation shows that age and breed-related changes in haematological and\nblood chemical test results are evident in young Labrador Retriever and\nMiniature Schnauzer dogs. The results confirm the need for age-specific\nreference ranges for the interpretation of clinical data obtained from young\npuppies. The potential effects of dietary vitamin A as well as growth related\nalterations in body tissue and metabolism are discussed in Chapter 6 together\nwith the results obtained from this study. In conclusion, the results of the\ncurrent study suggest that unlike to rodents dietary vitamin A does not affect\nenergy utilization, growth rate or body composition in dogs. The underlying\nbiochemical mechanisms however remain unclear and require further\nclarification. With regards to haematological and blood chemical parameters\nthe study showed marked age and breed related changes illustrating growth\nrelated alterations in body tissue and metabolism during the first year of\nlife. The early growth phase clearly appears to be most critical and needs to\nbe investigated in more depth to ease interpretation of clinical data obtained\nfrom young puppies.
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 | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,001 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,004 | 0,002 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,001 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,001 |
| 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 ».