Navigation Links
Heat stress influences low conception of dairy herds
Date:9/6/2007

Although it has been described that hyperthermia in lactating dairy cows can occur at air temperatures as low as 27C, only maximum daily temperatures <20C led to a significant increase in fertility. It should be stressed that in our geographical area, the maximum temperature was only <20C for 170 days per year.

As an overall conclusion, climate factors seem to be highly relevant for conception rate. The use of maximum temperatures gives more information that the one provided by THI variables. Thus, the use of the THI or temperature to control a farm environment would depend on the individual farm and on each environmental situation, but it is important to check temperature and humidity to know when to adopt cooling measures. Further studies should try to establish the effect of global warming at the farm level. This problem is reflected with warm summers and even with peaks of temperatures in winter.


'/>"/>

Contact: Irina Garcia-Ispierto
Irina.Garcia@uab.es
34-935-811-091
Universitat Autonoma de Barcelona
Source:Eurekalert

0

GOOD

Page: 1 2

Related biology news :

1. A little stress gives beneficial oomph! to immune system
2. Immune systems distress signal tells bacteria when to strike back
3. Scientists discover the bodys marijuana-like compounds are crucial for stress-induced pain relief
4. Endocannabinoids ?the brains cannabis ?demonstrate novel modes of action to stress
5. Penguin chicks exposed to human visitors experience spike in stress hormone
6. Stressed cells spark DNA repair missteps and speed evolution
7. Research Permits First-Ever Visualization of Psychological Stress in the Human Brain
8. Stress substantially slows human bodys ability to heal
9. Researchers unravel DNA tangles and enzyme seamstresses
10. Key stress protein linked to toxicities responsible for Parkinsons, Alzheimers
11. Just like us, social stress prompts hamsters to overeat, gain weight
Post Your Comments:
*Name:
*Comment:
*Email: