Document Detail

Comparison of physiological indicators of chronic stress in confined and nonconfined gilts.
MedLine Citation:
PMID:  6706873     Owner:  NLM     Status:  MEDLINE    
Two experiments were conducted to determine if confinement-induced delayed puberty in gilts was due to chronic physiological stress imposed by confinement housing. In both experiments, crossbred gilts, raised in total confinement, were moved to an outside dirt lot (nonconfined) or to a single pen in a confinement finishing unit (confined) at 100 to 110 d of age. Beginning at 150 d of age, estrus was checked daily with a boar to determine age at first estrus. Gilts were necropsied at 270 d of age. In Exp. I, 19 confined and 19 nonconfined gilts were cannulated by jugular puncture at 185 d of age. The day after cannulation, blood samples were collected for 4 h, 200 IU porcine adrenocorticoptropic hormone (ACTH) was injected via the cannulae and blood samples were collected for an additional 8 h. Serum cortisol, progesterone, luteinizing hormone (LH) and prolactin (PRL) concentrations were determined. In Exp. II, both jugular veins of six confined and six nonconfined gilts were cannulated at 204 d of age. The day after cannulation, blood samples were collected for 4 h and cortisol was continuously infused for the last 2 h of the blood collection period. Cortisol metabolic clearance rate (MCR) and secretion rate (SR) were determined. By 270 d of age, 21 of 28 (75%) nonconfined gilts and 11 of 31 (35.5%) confined gilts (P less than .01) in Exp. I and 18 of 25 (72%) nonconfined gilts and 12 of 25 (48%) confined gilts (P less than .06) in Exp. II had exhibited estrus and ovulated.(ABSTRACT TRUNCATED AT 250 WORDS)
G B Rampacek; R R Kraeling; E S Fonda; C R Barb
Related Documents :
2820623 - New findings in apparent mineralocorticoid excess.
11714503 - Stress-induced changes in brain serotonergic activity, plasma cortisol and aggressive b...
76563 - Antigenic activity and mobility of bovine pituitary hormones.
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of animal science     Volume:  58     ISSN:  0021-8812     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  1984 Feb 
Date Detail:
Created Date:  1984-05-22     Completed Date:  1984-05-22     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  401-8     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Housing, Animal*
Hydrocortisone / blood,  metabolism
Luteinizing Hormone / blood
Progesterone / blood
Prolactin / blood
Restraint, Physical / veterinary*
Sexual Maturation*
Stress, Physiological / metabolism,  physiopathology,  veterinary*
Swine Diseases / metabolism,  physiopathology*
Reg. No./Substance:
50-23-7/Hydrocortisone; 57-83-0/Progesterone; 9002-62-4/Prolactin; 9002-67-9/Luteinizing Hormone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Interactive effects of dietary calcium, phosphorus and copper on performance and liver stores of pig...
Next Document:  Seasonal changes in breeding activity, testicular size, testosterone concentration and seminal chara...