AI Article Synopsis
- Immunoreactive corticosterone and its metabolites (ICCM) were measured in the droppings of single and pair housed roosters to compare stress levels.
- After separating pair housed roosters and moving them to single housing, there was a significant increase in ICCM levels in their droppings two days post-separation, indicating stress response activation.
- The study highlights the need to express ICCM excretion as a rate (amount per time unit) rather than just total amount, since excretion rates depend on both ICCM concentration and the total volume of droppings produced.
Article Abstract
Immunoreactive corticosterone and corticosterone metabolites (ICCM) were quantified in excreta of permanently single housed (n=10) and permanently pair housed (n=20) roosters. The pair housed roosters were separated and single housed, and ICCM were quantified in the droppings before and during 15 days after separation. There was no statistically significant difference in ICCM excretion in the droppings between the permanently single or pair housed roosters. After separation, however, the previously pair housed roosters showed a significantly transient elevated excretion of ICCM in droppings the second day after separation indicating that the separation and relocation is associated with an activation of the hypothalamic-pituitary-adrenal axis. The excretion of ICCM in droppings was not correlated to the concentration of ICCM in droppings. It is thus important that excretion of ICCM be expressed as amount excreted per time unit since the total excretion is dependant on both concentration of ICCM and amount of droppings produced.
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| http://dx.doi.org/10.1016/j.rvsc.2008.04.003 | DOI Listing |
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