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Titolo:
The effect of a mixed-management system on the release of oxytocin, prolactin, and cortisol in ewes during suckling and machine milking
Autore:
Marnet, PG; Negrao, JA;
Indirizzi:
Equipe INRA, ENSAR Rech Traite, F-35042 Rennes, France Equipe INRA Rennes France F-35042 AR Rech Traite, F-35042 Rennes, France USP, CNPq, FASEP, Sao Paulo, Brazil USP Sao Paulo BrazilUSP, CNPq, FASEP, Sao Paulo, Brazil
Titolo Testata:
REPRODUCTION NUTRITION DEVELOPMENT
fascicolo: 3, volume: 40, anno: 2000,
pagine: 271 - 281
SICI:
0926-5287(200005/06)40:3<271:TEOAMS>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
EARLY LACTATION; COWS; SEASON; SHEEP;
Keywords:
oxytocin; prolactin; cortisol; milking; suckling; ewes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Marnet, PG Equipe INRA, ENSAR Rech Traite, 65 Rue St Brieuc, F-35042 Rennes, France Equipe INRA 65 Rue St Brieuc Rennes France F-35042 nes, France
Citazione:
P.G. Marnet e J.A. Negrao, "The effect of a mixed-management system on the release of oxytocin, prolactin, and cortisol in ewes during suckling and machine milking", REPROD NUTR, 40(3), 2000, pp. 271-281

Abstract

Milk yield and plasma oxytocin (OT), prolactin (PRL), and cortisol (CORT) during suckling and machine milking were measured in multiparous ewes subjected to a mixed management system of 3 sucklings and two daily milkings. Peak hormones were significantly increased and were similar during suckling and milking for PRL (181 vs. 163.3 ng.mL(-1)) and CORT (12.5 vs. 11.5 ng.mL(-1)). During the period of exclusive suckling, OT was always significantly released (90.3 pg.mL(-1)); however, during the period of mixed management, OT concentrations only increased during suckling compared to milking (91.7 vs. 13.1 pg.mL(-1)). The mean volume of milk obtained during suckling (632 mL) was significantly higher than during milking (255 mL). Thus, during a mixed management system, oxytocin and prolactin releases are not under similar central regulation. A mixed system, without OT release during milking, does not contribute to accelerate the conditioning of ewes for machine milking.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/10/20 alle ore 10:53:44