Hair cortisol and dehydroepiandrosterone sulfate concentrations in healthy beef calves from birth to 6 months of age

2021 ◽  
Vol 175 ◽  
pp. 89-94
Author(s):  
M. Probo ◽  
T. Peric ◽  
J. Fusi ◽  
A. Prandi ◽  
M. Faustini ◽  
...  
Keyword(s):  
Dehydroepiandrosterone Sulfate ◽  
Hair Cortisol ◽  
Beef Calves

scholarly journals Hair Cortisol, Testosterone, Dehydroepiandrosterone Sulfate and Their Ratios in Stallions as a Retrospective Measure of Hypothalamic–Pituitary–Adrenal and Hypothalamic–Pituitary–Gonadal Axes Activity: Exploring the Influence of Seasonality

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2202
Author(s):  
Sergi Olvera-Maneu ◽  
Anaïs Carbajal ◽  
Jaume Gardela ◽  
Manel Lopez-Bejar
Keyword(s):  
Influencing Factor ◽  
Stress Hormones ◽  
Dehydroepiandrosterone Sulfate ◽  
Stress Physiology ◽  
Hair Cortisol ◽  
Dehydroepiandrosterone Sulphate ◽  
Tissue Samples ◽  
Hypothalamic Pituitary Adrenal ◽  
Hair Samples ◽  
Wide Range

The monitoring of stress physiology includes studying a wide range of endocrinological mechanisms, which can be assessed using multiple tissue samples. This study aimed to evaluate the seasonal variations of hair C, T and DHEA-S in horses for a whole year, as well as to assess the variations between seasons of C/DHEA-S and T/C ratios as a retrospective measure of the hypothalamic–pituitary–adrenal and hypothalamic–pituitary–gonadal axis activity. Ten pure-breed Menorca stallions were included in the study. The hair samples were collected approximately every two months following the shave-reshave method caudally to the sternum. After a methanol-based extraction, samples were analyzed by enzyme immunoassay for cortisol, testosterone, and dehydroepiandrosterone sulphate. Following our findings, we detected that cortisol, testosterone and dehydroepiandrosterone sulphate were significantly affected by seasonality, with the highest values of cortisol during summer and the lowest values of testosterone during spring. Dehydroepiandrosterone sulphate concentrations were increased in autumn compared to the other studied periods. Additionally, the studied hormone ratios showed variations between seasons. To conclude, season should, therefore, be considered when assessing sexual and stress hormones in stallion hair, since this variable can be a potential influencing factor and led to misinterpretations.

Additional nutritional considerations for preconditioning beef calves.

EDIS ◽  
2017 ◽  
Vol 2017 (4) ◽  
Author(s):  
Philipe Moriel
Keyword(s):  
Average Daily Gain ◽  
Beef Steers ◽  
Labor Costs ◽  
Vaccine Response ◽  
Negative Effects ◽  
Beef Calves ◽  
Supplemental Feed ◽  
Concentrate Supplementation ◽  
Protein Supply ◽  
Daily Gain

Calves can be preconditioned using a wide variety of supplemental feed ingredients. However, feed ingredient selection is not the only factor to consider during a preconditioning process. Increasing the protein supply to stressed, preconditioning beef steers led to greater growth performance, and increased immune response to vaccination during a 42-day preconditioning period. Producers should not reduce the frequency of concentrate supplementation during the entire preconditioning period as it might lead to poorer vaccine response and average daily gain (consequently, less calf value at sale). However, a gradual reduction of frequency of supplementation is a supplementation strategy that can overcome these negative effects on growth and immunity, and allows producers to save on feeding and labor costs without producing lighter calves that have weaker immune responses.  

Hair cortisol in patients with primary aldosteronism

2017 ◽  
Author(s):  
Aaron Hodes ◽  
Maya Lodish ◽  
Amit Tirosh ◽  
Jerrold Meyer ◽  
Elena Belyavskaya ◽  
...  
Keyword(s):  
Primary Aldosteronism ◽  
Hair Cortisol

0259 Newborn beef calves benefit from supplementation of vitamins D and E

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 123-123
Author(s):  
C. D. Nelson ◽  
M. Poindexter ◽  
J. L. Powell ◽  
J. V. Yelich ◽  
S. L. Bird ◽  
...  
Keyword(s):  
Beef Calves

Effect of band and knife castration of beef calves on welfare indicators of pain at three relevant industry ages: II. Chronic pain

2017 ◽  
Vol 0 (0) ◽  
pp. 0 ◽  
Author(s):  
S. Marti ◽  
D. M. Meléndez ◽  
E. A. Pajor ◽  
D. Moya ◽  
C. E. M. Heuston ◽  
...  
Keyword(s):  
Chronic Pain ◽  
Beef Calves ◽  
Welfare Indicators

Influence of Dietary Supplements on Growth of Beef Calves on Semi-Desert Range

1961 ◽  
Vol 20 (3) ◽  
pp. 553-557 ◽  
Author(s):  
V. R. Bohman ◽  
H. Melendy ◽  
M. A. Wade
Keyword(s):  
Dietary Supplements ◽  
Beef Calves
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