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Mostrando ítems 1-10 de 2031
Impacts of cow body condition score during gestation on weaning performance of the offspring
(2016-09-01)
This experiment evaluated the impacts of cow body condition score (BCS) during gestation on productive parameters of the offspring. Three hundred multiparous, lactating, non-pregnant Angus × Hereford cows were assigned to ...
The effects of positive human contact by tactile stimulation on dairy cows with different personalities
(ELSEVIER SCIENCE BV, 2018)
The understanding of the ways in which cows with different personalities perceive human contact is essential for improving the quality of the human-animal relationship and therefore the welfare of dairy cows. The general ...
Characterization of the variable cow's age at last calving as a measurement of longevity by using the Kaplan-Meier estimator and the Cox model
(2013-04-01)
In most studies on beef cattle longevity, only the cows reaching a given number of calvings by a specific age are considered in the analyses. With the aim of evaluating all cows with productive life in herds, taking into ...
Characterization of the variable cow's age at last calving as a measurement of longevity by using the Kaplan-Meier estimator and the Cox model
(2013-04-01)
In most studies on beef cattle longevity, only the cows reaching a given number of calvings by a specific age are considered in the analyses. With the aim of evaluating all cows with productive life in herds, taking into ...
The effect of follicle age on pregnancy rate in beef cows
(Amer Soc Animal Science, 2014-03-01)
The effect of the age of the ovulatory follicle on fertility in beef cows was investigated. Multiparous (n = 171) and primiparous (n = 129) postpartum beef cows in 2 groups (G1 and G2) received estradiol benzoate (EB; 1 ...
Effects of temperament on physiological, productive, and reproductive responses in Bos indicus beef cows
(Amer Soc Animal Science, 2017-01-01)
This experiment evaluated the effects of temperament on physiological, productive, and reproductive responses in Bos indicus beef cows. A total of 953 lactating, multiparous, non-pregnant Nelore cows (age = 99 +/- 2 mo; ...
Estimation of genetic parameters for longevity considering the cow’s age at last calving
(2017-02-01)
The aim of this study was to estimate heritability and predict breeding values for longevity among cows in herds of Nellore breed, considering the trait cow’s age at last calving (ALC), by means of survival analysis ...
Repeatability and heritability of response to superovulation in Holstein cows
(1999-04-15)
The objective of this study was to estimate the relative effects of genetic and phenotypic factors on the efficacy and efficiency of superovulation for Holstein-Friesian cows reared in Brazil. A database, established by ...
Repeatability and heritability of response to superovulation in Holstein cows
(1999-04-15)
The objective of this study was to estimate the relative effects of genetic and phenotypic factors on the efficacy and efficiency of superovulation for Holstein-Friesian cows reared in Brazil. A database, established by ...