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Effect of transportation on cortisol concentrations and on the circadian rhythm of cortisol in gilts.
Am J Vet Res. 1985 Jul; 46(7):1457-9.AJ

Abstract

A study was conducted to determine whether the circadian rhythm of cortisol in gilts is disrupted or altered by transport. Sixteen ovariectomized gilts with indwelling jugular catheters were individually penned in an enclosed building (location 1). Blood samples were collected at 0700 and 1900 hours for 6 days. On day 7, gilts in groups of 4 were transported 5.6 km to environmentally controlled chambers (25 C) and were individually penned (location 2). On the day of transport, samples were collected at 0700 hours at location 1, immediately before and after transport in a trailer, after unloading at location 2, and at 1900 hours at location 2. For the first 6 days at location 2, blood samples were collected daily at 0700 and 1900 hours. For the 6 days at location 1, circadian rhythm was evidenced by higher cortisol concentrations in the AM hours than in the PM hours. During transport, serum cortisol concentrations increased (P less than 0.01). Highest concentrations developed at 0.5 hour after unloading; concentrations declined thereafter. During the first 6 days at location 2, circadian rhythm was evidenced by higher serum cortisol concentrations in the AM hours than in the PM hours. Therefore, the transportation of gilts 5.6 km to new pens was a transient stress causing a temporary increase in serum cortisol concentrations, but did not cause a disruption in the endogenous rhythm of cortisol.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

4026026

Citation

Becker, B A., et al. "Effect of Transportation On Cortisol Concentrations and On the Circadian Rhythm of Cortisol in Gilts." American Journal of Veterinary Research, vol. 46, no. 7, 1985, pp. 1457-9.
Becker BA, Nienaber JA, DeShazer JA, et al. Effect of transportation on cortisol concentrations and on the circadian rhythm of cortisol in gilts. Am J Vet Res. 1985;46(7):1457-9.
Becker, B. A., Nienaber, J. A., DeShazer, J. A., & Hahn, G. L. (1985). Effect of transportation on cortisol concentrations and on the circadian rhythm of cortisol in gilts. American Journal of Veterinary Research, 46(7), 1457-9.
Becker BA, et al. Effect of Transportation On Cortisol Concentrations and On the Circadian Rhythm of Cortisol in Gilts. Am J Vet Res. 1985;46(7):1457-9. PubMed PMID: 4026026.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of transportation on cortisol concentrations and on the circadian rhythm of cortisol in gilts. AU - Becker,B A, AU - Nienaber,J A, AU - DeShazer,J A, AU - Hahn,G L, PY - 1985/7/1/pubmed PY - 1985/7/1/medline PY - 1985/7/1/entrez SP - 1457 EP - 9 JF - American journal of veterinary research JO - Am. J. Vet. Res. VL - 46 IS - 7 N2 - A study was conducted to determine whether the circadian rhythm of cortisol in gilts is disrupted or altered by transport. Sixteen ovariectomized gilts with indwelling jugular catheters were individually penned in an enclosed building (location 1). Blood samples were collected at 0700 and 1900 hours for 6 days. On day 7, gilts in groups of 4 were transported 5.6 km to environmentally controlled chambers (25 C) and were individually penned (location 2). On the day of transport, samples were collected at 0700 hours at location 1, immediately before and after transport in a trailer, after unloading at location 2, and at 1900 hours at location 2. For the first 6 days at location 2, blood samples were collected daily at 0700 and 1900 hours. For the 6 days at location 1, circadian rhythm was evidenced by higher cortisol concentrations in the AM hours than in the PM hours. During transport, serum cortisol concentrations increased (P less than 0.01). Highest concentrations developed at 0.5 hour after unloading; concentrations declined thereafter. During the first 6 days at location 2, circadian rhythm was evidenced by higher serum cortisol concentrations in the AM hours than in the PM hours. Therefore, the transportation of gilts 5.6 km to new pens was a transient stress causing a temporary increase in serum cortisol concentrations, but did not cause a disruption in the endogenous rhythm of cortisol. SN - 0002-9645 UR - https://www.unboundmedicine.com/medline/citation/4026026/Effect_of_transportation_on_cortisol_concentrations_and_on_the_circadian_rhythm_of_cortisol_in_gilts_ DB - PRIME DP - Unbound Medicine ER -