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VetMed Resource

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

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Abstract

Castration is performed on bull calves to reduce aggressiveness and sexual activity, improve worker safety, prevent unwanted breeding, and improve meat quality. The objective of this study was to evaluate the effect of a zinc solution as an injectable castration method to bull calves before...

Author(s)
Ball, J. J.; Kegley, E. B.; Beck, P. A.; Apple, J. K.; Cox, D. R.; Powell, J. G.
Publisher
American Registry of Professional Animal Scientists (ARPAS), Champaign, USA
Citation
Professional Animal Scientist, 2018, 34, 2, pp 218-222
Abstract

The objectives of this study were to estimate heritability and genetic correlations for female traits (HR: heifer rebreeding; NC53: number of calves at 53 months of age; HP: heifer pregnancy at 18 months of age; AFC: age at first calving) and weight gains (BWG: from birth to weaning; WYG: from...

Author(s)
Schmidt, P. I.; Ferreira, I. A.; Silveira, D. D.; Campos, G. S.; Souza, F. R. P.; Carvalheiro, R.; Boligon, A. A.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Livestock Science, 2019, 229, pp 77-84
Abstract

In EU organic dairy farming, group housing of calves is required after the first week. Especially in Simmental herds, this is perceived as a risk factor for cross-sucking (CS), i.e. sucking the udder-region or the scrotal area or any other body part of another calf, which may reflect frustrated...

Author(s)
Grössbacher, V.; Winckler, C.; Leeb, C.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Applied Animal Behaviour Science, 2018, 206, pp 18-24
Abstract

A bioeconomic model was developed to calculate economic values for biological traits in full-cycle production systems and propose selection indices based on selection criteria used in the Brazilian Aberdeen Angus genetic breeding programme (PROMEBO). To assess the impact of changes in the...

Author(s)
Campos, G. S.; Braccini Neto, J.; Oaigen, R. P.; Cardoso, F. F.; Cobuci, J. A.; Kern, E. L.; Campos, L. T.; Bertoli, C. D.; McManus, C. M.
Publisher
Wiley-Blackwell, Berlin, Germany
Citation
Journal of Animal Breeding and Genetics, 2014, 131, 4, pp 305-312
Abstract

SNP-based DNA testing was used to assign paternity to 5,052 calves conceived in natural service multisire breeding pastures from 3 commercial ranches in northern California representing 15 calf crops over 3 yr. Bulls present for 60 to 120 d at a 25:1 cow to bull ratio in both fall and spring...

Author(s)
Eenennaam, A. L. van; Weber, K. L.; Drake, D. J.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2014, 92, 6, pp 2693-2701
Abstract

The effect of individual and dam (maternal) inbreeding was quantified for preweaning traits in an Angus nucleus herd that has been closed to outside breeding for 70 yr. The effectiveness of 5 models (linear, quadratic, exponential, Michaelis-Menten, and Rumford-Newton) was evaluated for describing...

Author(s)
Carrillo, J. A.; Siewerdt, F.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2010, 88, 1, pp 87-95
Abstract

The objective of this study was to compare performance and aspects of adaptability attributes of cattle from a Florida Angus bloodline (local source from a mostly closed herd for over 50 yr) to cattle that are representative of modern Angus bloodlines (outside source) in US subtropical conditions....

Author(s)
Riley, D. G.; Arthington, J. D.; Chase, C. C., Jr.; Coleman, S. W.; Griffin, J. L.; Rae, D. O.; Mader, T. L.; Olson, T. A.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2011, 89, 7, pp 2265-2272

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