Results 61 to 70 of about 55,813 (284)

Docility and heifer pregnancy estimates in Angus heifers

Kansas Agricultural Experiment Station Research Reports, 2014
Introduction Reproductive success is economically relevant in beef cattle operations because the number of calves born influences the value of calves sold at weaning. Improvements in reproductive performance can be up to four times more important than improvements in end-product traits in an operation selling calves at weaning.
Kari L. White, Jennifer M. Bormann, Daniel W. Moser, Robert L. Weaber   +3 more
openaire   +2 more sources

A Study of Dairy Heifer Rearing Practices from Birth to Weaning and Their Associated Costs on UK Dairy Farms

, 2015
There are many inputs into the dairy replacement herd which impact not only on the cost of rearing heifers from birth to first calving, but also on their future longevity and production potential.
A. Boulton, J. Rushton, D. C. Wathes
semanticscholar   +1 more source

Large‐scale reproductive loss in sheep due to Border disease virus infection, New South Wales, Australia

Australian Veterinary Journal, EarlyView.
Border disease viruses (BDV) and bovine viral diarrhoea viruses (BVDV) are members of the Pestivirus genus in the family Flaviviridae. While BVDV is one of the most significant endemic viral infections of cattle in Australia, BDV infection is generally considered to be uncommon in Australian sheep.
K Parrish, ZB Spiers, MS Hazelton, KH Walker, E Duggan, W Graham, DS Finlaison, PD Kirkland   +7 more
wiley   +1 more source

Survival rate of dairy heifer calves from birth to one year of age

Ukrainian Journal of Veterinary and Agricultural Sciences
The study examined the survival rate of dairy heifer calves from birth to one year of age over ten years (2009–2018). The frequency of heifer calves' death in different age periods has been identified, and the frequency of calf death depends on the ...
R. V. Stavetska, I. V. Tytarenko, V. V. Sudyka, Yu. P. Polupan   +3 more
doaj   +1 more source

Environmentally adjusted productivity growth and shadow prices for dairy farms

Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, EarlyView.
Abstract We estimate the environmentally adjusted productivity growth and shadow price for Ontario dairy farms. We use an input‐oriented directional distance function and farm‐level data from 2000 to 2020. First, we find that while GHG emissions per cow increase with higher milk yields, emission intensity decreases as milk yield per cow increases.
Bibek Dahal, Getu Hailu, Susantha Jayasundara   +2 more
wiley   +1 more source

The effect of growth and development intensity in replacement heifers on economically important traits of Holstein cattle in the Czech Republic

Czech Journal of Animal Science, 2007
The objective of the study was to determine the effect of growth and development intensity in Holstein replacement heifers on economically important animal traits.
J. Bouška, M. Štípková, M. Krejčová, L. Bartoň   +3 more
doaj   +1 more source

Cholecystectomy in a heifer

Journal of Veterinary Medical Science, 2017
A 10-month-old female Japanese black heifer presenting with sudden loss of appetite was diagnosed with extreme extension of the gallbladder. Laparotomy reaching from the right part of the 10th rib to the right flank showed an extended gallbladder greater than 50 cm in diameter.
TSUKA, Takeshi, TANAKA, Hinako, KONO, Shinji, MORITA, Takehito, MURAHATA, Yusuke, AZUMA, Kazuo, OSAKI, Tomohiro, ITO, Norihiko, OKAMOTO, Yoshiharu, IMAGAWA, Tomohiro   +9 more
openaire   +3 more sources

Unravelling Twin Births in German Holstein Cows: Phenotypic Associations, Genetic Analysis and Potential Underlying Genes and Hormones

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Twin births in dairy cattle are rare but present significant challenges for animal welfare, as both the health of the cow and the calves are affected. This causes economic losses, which prompts breeders to select against twin births and identify associated risk factors.
Laura Hüneke, Hatem Alkhoder, Dierck Segelke, Georg Thaller, Christin Schmidtmann   +4 more
wiley   +1 more source

Effect of Limit-Fed Diets With Different Forage to Concentrate Ratios on Fecal Bacterial and Archaeal Community Composition in Holstein Heifers

Frontiers in Microbiology, 2018
Limit-feeding of a high concentrate diet has been proposed as an effective method for improving feed efficiency and reducing total manure output of dairy heifers; meanwhile the effects of this method on hindgut microbiota are still unclear.
Jun Zhang, Haitao Shi, Haitao Shi, Yajing Wang, Zhijun Cao, Hongjian Yang, Shengli Li   +6 more
doaj   +1 more source

Genetic Parameter Estimation for Pregnancy Loss and Their Association With Reproductive and Growth Traits in Brahman Cattle Under Extensive Tropical Conditions

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT This study estimated genetic parameters for pregnancy loss (PL) in Brahman cattle and evaluated the genetic correlation of PL with growth and reproductive traits using both the pedigree relationship matrix (A) and pedigree plus genomic relationship matrix (H). Data were collected from two herds in Bolivia, focusing on three age groups: heifers,
Daniel Cardona‐Cifuentes, Lucia G. de Albuquerque, Milagros Arias, Sindy Caivio‐Nasner, Luis Camaripano, Luis G. Gonzalez‐Herrera, Patricia I. Schmidt, Fernando Baldi   +7 more
wiley   +1 more source