Farm Table says:
Sex-dependent differences in the effect of early weaning on the chosen hormones secretion in sheep during the postnatal transition to puberty – Preliminary results
What is the problem?
This research wanted to understand the impact of early weaning on hormone secretions in lambs of both sexes and testosterone level in male lambs.
What did the research involve?
- Polish Longwool ewes
- Compared hormone concentration levels of lambs weaned at 5 weeks, 9 weeks, 12 weeks and 16 weeks.
What were the key findings?
- The cortisol concentrations were greater in control and early weaned female lambs than in male lambs at investigated stages.
- Weaning at 5 weeks of age resulted in the lover cortisol secretion in male lambs in contrast to the greater cortisol secretion in female lambs at 16 weeks of age.
- Early weaning results in the sexually dimorphic stress reaction that is more potent and long-lasting in female in contrast to male lambs.