Effect of castration method and the provision of local anesthesia on plasma cortisol, scrotal circumference, growth, and feed intake of bull calves

To determine the effects of castration of calves, with or without local anesthesia, on plasma cortisol, scrotal circumference, ADG, and ADFI, 56 Friesian bulls (5.5 mo of age; mean +/- SE BW = 173 +/- 2 kg) were randomly assigned to each of seven treatments: 1) control (CON); 2) s.c. injection of -....

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Bibliographic Details
Published in:Journal of animal science 1996-10, Vol.74 (10), p.2336-2343
Main Authors: Fisher, A.D. (Teagasc, Grange Research Centre, Dunsany, Co. Meath, Ireland.), Crowe, M.A, Varga, M.E.A. de la, Enright, W.J
Format: Article
Language:English
Subjects:
ANESTESIA
Anesthesia, Local - veterinary
ANESTHESIE
Anesthetics, Local - pharmacology
Animal productions
Animals
BIEN ETRE ANIMAL
BIENESTAR ANIMAL
Biological and medical sciences
CASTRACION
CASTRATION
Cattle - growth & development
Cattle - metabolism
Cattle - physiology
Eating - physiology
ESTEROIDES
Fundamental and applied biological sciences. Psychology
GAIN DE POIDS
GANANCIA DE PESO
Gonadotropin-Releasing Hormone - administration & dosage
Gonadotropin-Releasing Hormone - pharmacology
GONFLEMENT
HINCHAMIENTO
Hydrocortisone - blood
INGESTION DE PIENSOS
Injections, Subcutaneous - veterinary
Lidocaine - pharmacology
Male
MEDICION DEL CUERPO
MENSURATION CORPORELLE
OPERACIONES QUIRURGICAS
OPERATION CHIRURGICALE
Orchiectomy - methods
Orchiectomy - veterinary
PLASMA SANGUIN
PLASMA SANGUINEO
PRISE ALIMENTAIRE (ANIMAUX)
Random Allocation
Scrotum - anatomy & histology
Serum Albumin - administration & dosage
Serum Albumin - pharmacology
STEROIDE
TERNERO
Terrestrial animal productions
VEAU
Vertebrates
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Summary:To determine the effects of castration of calves, with or without local anesthesia, on plasma cortisol, scrotal circumference, ADG, and ADFI, 56 Friesian bulls (5.5 mo of age; mean +/- SE BW = 173 +/- 2 kg) were randomly assigned to each of seven treatments: 1) control (CON); 2) s.c. injection of -.1 mg of a human serum albumin-GnRH conjugate with DEAE-dextran adjuvant (HSA-GnRH); 3) burdizzo castration without local anesthetic (BURD); 4) burdizzo castration following local anesthetic administration (BURD + LA); 5) surgical castration without local anesthetic (SURG); 6) surgical castration following local anesthetic administration (SURG + LA); and 7) local anesthetic administration alone (LAA). Blood samples for cortisol analyses were taken via jugular catheter from -2 to 10 h and at 24, 48, and 72 h relative to treatment. Average daily feed intakes were recorded for 5-d periods and calves weighed at 7-d intervals before and after treatment. Local anesthetic alone had no effect (P -.10) on any variable. The HSA-GnRH calves had elevated (P -.05) plasma cortisol from 2 to 6 h compared with CON calves. Peak plasma cortisol was elevated (P -.01) in BURD, BURD + LA, SURG, and SURG + LA compared with CON calves. The SURG calves (46.0 ng/mL) had higher (P -.03) peak cortisol than BURD (31.4 ng/mL) and SURG + LA (35.4 ng/mL) calves. There was no difference in peak cortisol between BURD and BURD + LA (26.5 ng/mL) calves. The ADG from d 0 to 7 was reduced (P -.05) in calves in BURD + LA, SURG, and SURG + LA treatments (-.01, -.83 and -.24 kg, respectively) compared with CON calves (.54 kg). The ADFI were reduced (P -.05) in BURD and BURD + LA calves during d 1 to 5 and in BURD + LA, SURG, and SURG + LA calves during d 6 to 10 compared with CON calves. The scrotal circumferences of BURD and BURD + LA calves were greater (P -.05) than those of CON calves for 7- and 35-d periods post-castration, respectively. Castration induced increases in cortisol and decreases in ADG
ISSN:0021-8812
1525-3163
0021-8812
DOI:10.2527/1996.74102336x