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Veterinary information to support practice, based on evidence and continuing education

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Abstract

The fertility of lactating Holstein cows is severely reduced during periods of heat stress. Despite this reduction in fertility, however, some inseminations conducted during heat stress result in successful pregnancies from which heifer calves are born. Many of these heifer calves are retained and...

Author(s)
Brown, B. M.; Stallings, J. W.; Clay, J. S.; Rhoads, M. L.
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS ONE, 2016, 11, 2, pp e0148234
AbstractFull Text

Author(s)
Du, F.; Gay, K. D.; Sowerby, M. E.; Newman, Y. C.; Staples, C. R.; Lacy, R. C.; Vries, A. de
Publisher
New South Wales Department of Primary Industry, Orange, Australia
Citation
Revitalising Grasslands to Sustain our Communities: Proceedings, 22nd International Grassland Congress, 15-19 September, 2013, Sydney, Australia, 2013, pp 246-247
Abstract

Heat stress at the time of conception affects the subsequent milk production of primiparous Holstein cows; however, it is unknown whether these effects are maintained across multiple lactations. Therefore, the objective of the current study was to examine the relationship between periconceptional...

Author(s)
Brown, B. M.; Stallings, J. W.; Clay, J. S.; Rhoads, M. L.
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS ONE, 2015, 10, 10, pp e0133574
Abstract

This paper reports on the results of a survey which was conducted to determine grass-fed beef producers' perceptions of the challenges associated with the enterprise, their goal structure and their reasons for selecting the enterprise. The findings are based upon 65 responses from a randomly...

Author(s)
Sitienei, I.; Bhandari, B. D.; Gillespie, J. M.; Scaglia, G.
Publisher
Louisiana Agricultural Experiment Station, Baton Rouge, USA
Citation
Louisiana Agriculture, 2014, 57, 4, pp 22-23
Abstract

Bovine respiratory disease (BRD) is the leading cause of death of nursing beef calves 3 weeks of age and older, but little is known regarding risk factors for calf BRD. The objective of this survey was to describe observations and practices relevant to calf BRD by veterinarians in cow-calf...

Author(s)
Woolums, A. R.; Berghaus, R. D.; Smith, D. R.; White, B. J.; Engelken, T. J.; Irsik, M. B.; Matlik, D. K.; Jones, A. L.; Smith, I. J.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Bovine Practitioner, 2014, 48, 1, pp 26-35
Abstract

Author(s)
Woolums, A. R.; Berghaus, R. D.; Smith, D. R.; White, B. J.; Engelken, T. J.; Irsik, M. B.; Matlik, D. K.; Jones, A. L.; Smith, I. J.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Proceedings of the 46th Annual Conference of the American Association of Bovine Practitioners, Milwaukee, Wisconsin, USA, 19-21 September 2013, 2014, pp 177-178
Abstract

This book reports on the beef 2007-08 study in 24 States of USA with the largest beef-cow populations. Focusing on the prevalence and control of Bovine Viral Diarrhoea Virus (BVDV), the book is divided into five sections, section I provides an overview of BVDV and control of BVDV, including testing ...

Publisher
United States Department of Agriculture (USDA), Washington, USA
Citation
Beef 2007-08. Prevalence and control of bovine viral diarrhea virus on U.S. cow-calf operations, 2007-08, 2010, pp vii + 88 pp.
Abstract

Effects of artificial insemination (AI) and natural service (NS) breeding systems on pregnancy rates (PR) by stage of lactation, season, and changes in milk production over time were examined using lactation and herd DHIA records of Holstein cows in dairy herds located in Florida and Georgia. The...

Author(s)
Vries, A. de; Steenholdt, C.; Risco, C. A.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2005, 88, 3, pp 948-956
Abstract

The purpose of this study was to estimate trends in conception rate (CR) of Holsteins in the southeastern United States over time across month by milk production level and month by days in milk (DIM) subclasses. Data were obtained from Dairy Records Management Systems (Raleigh, NC) and included...

Author(s)
Huang, C.; Tsuruta, S.; Bertrand, J. K.; Misztal, I.; Lawlor, T. J.; Clay, J. S.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2009, 92, 9, pp 4641-4647
Abstract

The genetic effect of heat tolerance in Holsteins was studied using a repeatability test-day model with random regression on a function of temperature-humidity index (THI) during the day of recording. Phenotypic data were test-day records for production on cows from Georgia and Florida, and...

Author(s)
Misztal, I.; Ravagnolo, O.
Publisher
Institut National de la Recherche Agronomique (INRA), Montpellier, France
Citation
Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002. Session 18, 2002, pp 1-4

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