Ovulation of the first dominant follicle arising after day 21 post partum in suckling beef cows.
Annual energy intake and the performance of beef cows differing in body size and milk potential.
The accumulative effects of different levels of annual energy intake over the first two parities on four breeds of beef cow (small size and low milk potential, Aberdeen Angus; small size and high milk potential, Welsh Black; large size and low milk potential, Charolais; and large size and high milk potential, Simmental) were assessed for various production traits and calf performance.
Annual energy intake and the metabolic and reproductive performance of beef cows differing in body size and milk potential.
The metabolic status and reproductive performance of four pure breeds of beef cow (small size and low milk potential, Aberdeen Angus; small size and high milk potential, Welsh Black; large size and low milk potential, Charolais; and large size and high milk potential, Simmental) were monitored during their first two parities. Heifers from each breed were allocated to one of two levels of annual energy intake relative to metabolic body weight (M075) (mean daily intakes equivalent to 705 and 820 kj/kg M0·75) in a factorial design.
Molecular diversity of bovine viral diarrhea virus in Uruguay.
ABSTRACT. Bovine viral diarrhea (BVD) affects bovine production and reproduction causing significant economic losses all over the world. Two viral species has been recognized:BVDV-1 and BVDV-2, both distributed worldwide. Recently, novel specie of BVDV named HoBi-like pestivirus was discovered. The presence of BVDV was confirmed in 1996 in Uruguay, however, does not exist until today a schedule of compulsory vaccination along the country.
Two-step weaning in beef calves:Permanence of nose flaps for 7 or 21 days does not influence the behaviour response.
Abstract. Two-step weaning with nose flaps is used to minimise the stress of weaning in beef calves. Farmers leave the nose flaps for 7–30 days, basing the period on practical considerations. Thus, the objective of this study was to compare the behavioural response of 6-month-old beef calves fitted with nose flaps during 7 or 21 days before permanent separation from the dam, or abruptly weaned.
Two-step weaning in beef calves: Permanence of nose flaps for 7 or 21 days does not influence the behaviour response.
Abstract. Two-step weaning with nose flaps is used to minimise the stress of weaning in beef calves. Farmers leave the nose flaps for 7–30 days, basing the period on practical considerations. Thus, the objective of this study was to compare the behavioural response of 6-month-old beef calves fitted with nose flaps during 7 or 21 days before permanent separation from the dam, or abruptly weaned.
Concentrations of steroid hormones, estrous, ovarian andreproductive responses in sheep estrous synchronized withdifferent prostaglandin-based protocols.
To determine estrous, ovarian and reproductive responses after different prostaglandin(PG)-based protocols, ewes were assigned to groups PG10, PG12, PG14 or PG16 (two PGinjections administered 10, 12, 14 or 16 days apart; respectively). Experiment I (n = 132) wasconducted to evaluate the estrous response, ovulation rate (OR), conception and fertility.Experiment II (n = 24) was conducted to evaluate ovarian follicle growth, steroid concen-trations and the interval from the second PG injection to estrus (PG-estrus) and ovulation(PG-ovulation).
Chips de papa, la fritura en vacío y beneficios para la salud.
RESUMEN. Existe una tendencia del mercado al consumo de alimentos más saludables que ha motivado a la industria alimentaria a innovar en tecnologías.
Análisis y caracterización de la variabilidad climática en algunas regiones de Uruguay. (Analysis and characterization of climate variability in some regions of Uruguay).
RESUMEN La variabilidad climática y la ocurrencia de eventos extremos (heladas, granizos, sequías, inundaciones) resultan en perjuicios importantes para la producción agropecuaria requiriendo de varios años para la recuperación económica y financiera del deterioro ocasionado. Un ejemplo de esto es la precipitación registrada a nivel nacional en diciembre de 2013 con anomalías negativas de 100 mm a 200 mm en contraste con las ocurridas al mes siguiente, enero de 2014, cuando se registraron anomalías positivas de 300 mm a 400 mm.