Results 31 to 40 of about 11,071 (289)
Italian Journal of Animal Science, 2010 Reproductive rate is an important component of economic success in livestock production. Parturition interval (IEP) is a direct measure of the productivity of the animal. Long IEP reduce the number of calves produced per year.
J.C. De Souza +6 more
doaj +1 more source
Genetic analysis of reproductive performance of Frieswal cattle at Military Farm, Ambala [PDF]
Veterinary World, 2015 Aim: This study was carried out to investigate the genetic analysis of reproductive performance of Frieswal cattle at Military Farm, Ambala. Materials and Methods: A total number of 3005 lactation records of 1147 Frieswal cows over a period of 15 years ...
Jagdeep Kumar +5 more
doaj +1 more source
Spanish Journal of Agricultural Research, 2017 The objective of this study was to evaluate genotype × environment interaction (G×E) between Canada, the United States and Mexico for fertility and milk yield traits using genetic correlations between countries estimated from genetic evaluations of ...
Hugo H. Montaldo +4 more
doaj +1 more source
Genetic parameters of growth in dairy cattle and associations between growth and health traits [PDF]
, 2007 Body weight (BW) observations on dairy cattle taken on average 35 times between birth and 1,000 d of life were used to estimate daily heritabilities and predict daily breeding values for both pregnancy-adjusted BW (PABW) and growth rate.
Brotherstone, S. +5 more
core +1 more source
Genetic evaluation of reproduction performance of Jersey × Red Sindhi crossbred cows [PDF]
Veterinary World, 2016 Aim: The present investigation was undertaken to study the reproduction performance and effect of non-genetic factors on reproduction performance of Jersey crossbred cows. Materials and Methods: Data on 355 Jersey crossbred cattle maintained at the Post-
S. Vinothraj +4 more
doaj +1 more source
Insemination factors affecting the conception rate in seasonal calving Holstein-Friesian cows
, 2003 peer-reviewedDifferences in conception rate to first service between artificial inseminations (AI) carried out by commercial AI operators (CAI) or do-it-yourself operators (DIY), between natural service (NAT) and AI, between different AI sires, and ...
Mee, John F +13 more
core +1 more source
ASSOCIATION OF TRANSFERRIN POLYMORPHISM WITH REPRODUCTVE TRAITS OF GIR CATTLE [PDF]
Exploratory Animal and Medical Research, 2012 The present study on 28 known genotype of Gir cattle was carried out to investigate the association of transferrin polymorphism with different reproductive traits at the Department of Animal Genetic and Breeding, West Bengal University of Animal and ...
R. Guha, P.K. Senapati, S. Taraphder
doaj
American Journal of Agricultural Economics, EarlyView.Abstract Our general interest is in global trade loss from livestock pathogens, specifically exports. We adopt a causal inference approach that considers animal disease outbreaks over time as non‐staggered binary treatments with the potential for switching in (infection) and out of treatment (recovery) within the sample period. The outcome evolution of
Mohammad Maksudur Rahman +1 more
wiley +1 more source
Age at first calving and calving interval.
, 2018 Back-transformed predicted means (± 95% confidence intervals) obtained from mixed effects multivariable regression modelling for calving interval (days) by different age at first calving (AFC) class.
Amy Coates (5390834) +5 more
core +1 more source
Accounting for animal health in efficiency analysis: An application to Swedish dairy farms
American Journal of Agricultural Economics, EarlyView.Abstract Poor animal health is a central concern in modern livestock production. Despite the necessity to incorporate animal health in efficiency analysis, the theoretical and empirical developments are limited on this subject. This article appropriately characterizes the axiomatic properties of animal health within a production framework.
Frederic Ang +3 more
wiley +1 more source