Decrease of plasmatic aldosterone of growing half–bred zebu calves
It was suggested that the growth delay of early–weaned calf wouldbe attributed to stress. In this case, plasmatic increases of aldosterone concentration shouldhave occurred. To prove this hypothesis, values of this hormone were determined in 120 half–bred zebu calves (2 months old, 50% each sex). Si...
Guardado en:
| Autor principal: | |
|---|---|
| Formato: | Artículo revista |
| Lenguaje: | Español |
| Publicado: |
Universidad Nacional del Nordeste
2004
|
| Materias: | |
| Acceso en línea: | https://revistas.unne.edu.ar/index.php/vet/article/view/1997 |
| Aporte de: |
| Sumario: | It was suggested that the growth delay of early–weaned calf wouldbe attributed to stress. In this case, plasmatic increases of aldosterone concentration shouldhave occurred. To prove this hypothesis, values of this hormone were determined in 120 half–bred zebu calves (2 months old, 50% each sex). Sixty of them were weaned at 60–70 dayspost–partum (lot W), while the rest continued nursing (lot U). Using a repeated measuresdesign, aldosterone was evaluated by radioimmunoassay on days 0 (early weaning), 7, 14, 21,28, 60, 90 and 120 (traditional weaning). Concentrations were 348±12 and 351±13 pg/ml onday 0, as well as 288±11 and 291±14 pg/ml on day 120, in U and W, respectively. This fallingtendency was statistically significant (p < 0.05) and it is attributed to the ontogeny. However,in each sampling date, significant differences between lots were not registered, moving awaythe possibility of stress. |
|---|