Results 21 to 30 of about 46,786 (294)
Genotype-environment interaction for age at first calving in Holstein cows in Brazil. [PDF]
Vet Anim Sci, 2020 Dairy cattle production is distributed throughout the Brazilian regions. However, Brazilian producing regions are different in air temperature and humidity, diet, birth season, and other factors that may alter the reproductive performances of cows. The age of the cow at first calving (AFC) is a good indicator of sexual precocity since it shows the ...
Santos JC +4 more
europepmc +4 more sources
Genetic relationships between calving date, calving interval, age at first calving and type traits in beef cattle [PDF]
Livestock Production Science, 2002 In this paper the genetic relationships between major reproductive traits in beef cattle (Calving Date, Calving Interval and Age at First Calving) and type traits have been estimated to evaluate the usefulness of type classification in predicting reproductive performance in beef cattle.
Gutiérrez, J.P. (Juan) +5 more
openaire +4 more sources
Optimisation of age at first calving in Karan Fries cattle
Indian Journal of Animal Sciences, 2016 The study was conducted on the performance records of age at first calving (AFC) spread over a period of 15 years on Karan Fries crossbred cattle maintained at Livestock Research Centre.
K PUHLE JAPHETH +5 more
doaj +2 more sources
Fecundity of the Lagune Cow in Benin. Age at first calving and Calving Intervals
Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 2005 Data collected from 1987 to 2003 at the Samiondji farm in Benin were used to study the age at first calving (n = 200) and calving intervals (n = 805) in the Lagune cow.
T.I. Alkoiret, A.B. Gbangboche
doaj +2 more sources
Borgu Cow Fertility in Benin: Effect of Age at First Calving on Calving Intervals
Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 2002 Data collected on the farm of Kokoubou’s monastery (department of Borgu in Benin) were used to study the age at first calving and calving intervals in Borgu cows. From 1967 to 1989, 91 ages at first calving and 524 calving intervals were used.
M. Adamou N'Diaye +3 more
doaj +2 more sources
Age at first calving and lifetime performance of Hariana cattle at organized farms
Indian Journal of Animal Sciences, 2022 The present investigation was undertaken to access age at first calving, actual lifetime milk yield per day of productive life, actual lifetime milk yield per day of herd life and actual lifetime milk yield per day of total life. The non-genetic factors
MAHANTESH SHETKAR +5 more
doaj +2 more sources
Animal, 2016 Survival during the first year after first calving was investigated over the last 25 years, 1989-2013, as well as how the association of survival with season of calving, age at first calving (AFC) and within-herd production level has changed over that ...
M. van Pelt, G. de Jong, R. Veerkamp
semanticscholar +3 more sources
OPTIMIZATION OF AGE AT FIRST CALVING IN KARAN FRIES CATTLE [PDF]
Exploratory Animal and Medical Research, 2012 Data on 571 Karan Fries (crossing Tharparkar and Sahiwal cows with American Holstein Friesian sires) at NDRI, Karnal was studied for determination of optimum age at first calving (AFC).
P.K.Panja, S. Taraphder
doaj +1 more source
Open Journal of Animal Sciences, 2013 Age at first calving (AFC) affects the profitability of dairy enterprises. This study examined the relationships between AFC and subsequent fertility, milk production and survival up to third calving in UK Holstein-Friesian heifers; Study 1 comprised
J. Cooke +3 more
semanticscholar +3 more sources
Influence of Age at First Calving on Milk Quantity at Holstein-Friesian Cows
International Journal of Current Microbiology and Applied Sciences, 2016 Recommendations for age at first calving referred in the literature are too contradictory. In a study of Gergovska (2011) had been established average age of first calving 30 months, which according to other authors (Petraskiene et al., 2007) it is too ...
Zapryanka Shindarska +2 more
openaire +2 more sources