Results 81 to 90 of about 46,786 (294)

Effect of age at first calving on longevity and fertility traits for Holstein cattle.

, 2018
Effects of age at first calving (AFC) on functional longevity of Czech Holstein cows and their reproduction traits in the first lactation were analyzed using the first lactation data of 605 538 Holstein cows first calved from 1993 to 2008.
L. Zavadilová, M. Štípková
semanticscholar   +1 more source

Use of Restricted Nursing and a Bovine Appeasing Substance on the Welfare, Growth Performance, and Response to Vaccination of Beef Calves at Weaning

Animal Research and One Health, EarlyView.
The effects of restricted nursing (RN) and the administration of a bovine appeasing substance (BAS) on days −8 and 0 in relation to weaning were evaluated. Both strategies were effective in improving the growth performance of beef calves. Regarding welfare, BAS ‐especially on day 0‐ was more effective than RN.
Denise E. Mussalafo, Marcelo Vedovatto, Aylpy R. D. Santos, Dalton M. Oliveira, Fabiana A. M. Sterza, Mariana Santos, Helena B. C. R. Batista, Jaíne G. Garcia, Andréa R. D. L. Souza   +8 more
wiley   +1 more source

Retrospective: duration and efficiency of dairy cows productive lifespan depending on age at first calving and first lactation milk productivity

Agraarteadus, 2022
The retrospective analysis involved 562 Holstein cows, 545 Ukrainian Black-and-White dairy cows and 100 Ukrainian Red-and-White dairy cows in Breeding Station Terezyne, Kyiv region.
Vitalii Siriak, Yuriy Polupan, Ruslana Stavetska   +2 more
doaj   +1 more source

Reproductive performance of Kedah-Kelantan cattle at Pusat Ternakan Haiwan Pantai Timur, Malaysia. [PDF]

, 2010
Data between 1996 and 2009 at Pusat Ternakan Haiwan Pantai Timur, Malaysia were used to analyse the age at first calving, age at conception, calving interval and mean birth weight of Kedah-Kelantan (KK) cattle.
Haron, Abdul Wahid, Warzukni, Nor Aini
core  

Comparative analysis of microRNAs in bovine colostrum and neonatal calf blood

Journal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND MicroRNAs (miRNAs) are short non‐coding RNAs that participate in a wide range of biological processes. MiRNAs are present in high concentrations in colostrum, and these may be potentially transferred to newborn calves being fed colostrum.
Do T Hue, Kiro Petrovski, Yan Ren, John L Williams, Tong Chen, Wai Y Low, Thien D Van, Cynthia D K Bottema   +7 more
wiley   +1 more source

Evaluation of Selected Effects on Milk Production and Fertility in Holstein Dairy Cattle

Scientific Papers Animal Science and Biotechnologies, 2023
The breeding of dairy cattle, in terms of investment and operating costs, is the most demanding sector of livestock production. In terms of importance for agricultural enterprises and all of society, in most EU Member States and the Czech Republic it is ...
Tomáš Frejlach, Miloslav Šoch, Jan Frelich, Luboš Zábranský, Anna Švarcová, Zuzana Křížová, Iveta Novotná, Kateřina Švejdová, Anna Šimková, Robert Kala   +9 more
doaj  

Reproductive and productive performance of water buffaloes in central plateau of Brazil

Italian Journal of Animal Science, 2010
Data were collected from 1994 to 2006 at crossbred water buffaloes of Jafarabadi, Murrah and Mediterranean breeders, in Quirinópolis (18o33’S, 50o27’W and 470m of altitude), Goiás, Brazil.
T.M.M. Machado, M. Dias, V.A. Nascimento
doaj   +1 more source

Estimation of the Genetic Components of (Co)variance and Preliminary Genome-Wide Association Study for Reproductive Efficiency in Retinta Beef Cattle

Animals, 2023
In this study, we analyzed the variation of reproductive efficiency, estimated as the deviation between the optimal and real parity number of females at each stage of the cow’s life, in 12,554 cows belonging to the Retinta Spanish cattle breed, using ...
José María Jiménez, Rosa María Morales, Alberto Menéndez-Buxadera, Sebastián Demyda-Peyrás, Nora Laseca, Antonio Molina   +5 more
doaj   +1 more source

Strategies For Reducing Age at First Calving in Dairy Animals

, 2023
Raising heifers is one of the most expensive components of the dairy farm operations as they are future of dairy farm. They are produced to replace the older and uneconomical females of the farm through culling. When genetic trends are positive, such replacements help harvest the benefits of genetic gain. Heifer production is most expensive part of the
openaire   +1 more source

Predicted genetic consequences of alternative population control strategies for North American plains bison in Yellowstone National Park

The Journal of Wildlife Management, EarlyView.
Management of bison in Yellowstone National Park under the available strategies that maintained ≥3,500 individuals (1:1 sex ratio), removed <40% of the population at a time and prioritized relatives for removal were predicted to maintain genetic variation at levels consistent with long‐term conservation (>95% of existing variation).
Shawna J. Zimmerman, Chris Geremia, Sara J. Oyler‐McCance   +2 more
wiley   +1 more source