Now showing items 1-10 of 446
Impacts of stocking density on development and puberty attainment of replacement beef heifers
In all, 60 Angus×Hereford heifers were ranked by age and BW (210±2 days and 220±2 kg) on day 0, and assigned to: (a) one of three drylot pens (10×14 m pens; 10 heifers/pen) resulting in a stocking density of 14 m2/heifer ...
Performance, carcass and cut yields of crossbred Marchigiana x Nellore animals, bulls and heifers, finished in feedlots
(Revista Brasileira Zootecnia Brazilian Journal Animal SciVicosa-mgBrasil, 1998)
Plasma progesterone concentration in beef heifers receiving exogenous glucose, insulin, or bovine somatotropin
(Amer Soc Animal Science, 2012-09-01)
Three experiments were conducted to evaluate plasma concentrations of glucose, insulin, IGF-I, and progesterone (P4) in pubertal beef heifers receiving exogenous glucose, insulin, or sometribove zinc. All heifers used had ...
Creep-feeding to stimulate metabolic imprinting in nursing beef heifers: Impacts on heifer growth, reproductive and physiological variables
This experiment compared growth, physiological, and reproductive responses of beef heifers with (MI) or without (CON) access to a creep-feeder, as a manner to stimulate metabolic imprinting while nursing their dams. On day ...
Growth, metabolic status and ovarian function in buffalo (Bubalus bubalis) heifers fed a low energy or high energy diet
The aim was to establish the capacity of buffalo heifers to adapt their metabolic requirements to a low energy diet. Murrah buffalo (Bubalus bubalis) heifers undergoing regular estrous cycles were randomly assigned by age, ...
Effects of bovine somatotropin administration on growth, physiological, and reproductive responses of replacement beef heifers
This experiment compared growth, body composition, plasma IGF-I and leptin, and reproductive development of beef heifers receiving or not recombinant bovine ST (BST) beginning after weaning until the first breeding season. ...
Effect of follicle age on conception rate in beef heifers
(Amer Soc Animal Science, 2014-03-01)
The objective of this study was to determine the effect of age of the ovulatory follicle on fertility in beef heifers. Ovulation was synchronized with the 5 d CO-Synch + controlled intravaginal drug release (CIDR) program ...
Reproductive tract development and puberty in two lines of Nellore heifers selected for postweaning weight
The objective was to evaluate reproductive tract development (ovary and uterus) and onset of puberty in two lines of Nellore heifers (Bos indicus) selected for postweaning weight. A total of 123 heifers, including 46 from ...
Genetic evaluation of the probability of pregnancy at 14 months for Nellore heifers
(Amer Soc Animal Science, 2002-04-01)
To estimate the heritability for the probability that yearling heifers would become pregnant, we analyzed the records of 11,487 Nellore animals that participated in breeding seasons at three farms in the Brazilian states ...
Effect of early luteolysis in progesterone-based Al protocols in Bos indicus, Bos indicus x Bos taurus and Bos taurus heifers
(ELSEVIER SCIENCE INC, 2008)
The objective of this study was to evaluate the effects of treatment with an intravaginal progesterone-releasing device (CIDR) and estradiol benzoate (EB) on follicular dynamics in Bos indicus (n = 23), Bos taurus (n = ...