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Animal Science Database

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Abstract

Genetic selection of dairy cattle in the United States has included reproductive traits (daughter pregnancy rate, DPR; heifer conception rate, HCR), which is believed to have partly contributed to halting the decline in reproductive performance. The objectives of the current study were to evaluate...

Author(s)
Veronese, A.; Marques, O.; Moreira, R.; Belli, A. L.; Bisinotto, R. S.; Bilby, T. R.; Peñagaricano, F.; Chebel, R. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 7, pp 6624-6638
Abstract

The objective of this experiment was to evaluate the reproductive performance and herd exit dynamics of dairy cows managed for first service with programs varying in method of submission for insemination and voluntary waiting period (VWP) duration. Holstein cows from a commercial farm in New York...

Author(s)
Stangaferro, M. L.; Wijma, R.; Masello, M.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 2, pp 1673-1686
Abstract

This experiment evaluated the reproductive performance, herd exit dynamics, and lactation performance of dairy cows managed with a voluntary waiting period (VWP) of 60 or 88 d. Secondary objectives were evaluating VWP effect on cyclicity status, uterine health, systemic inflammation, and body...

Author(s)
Stangaferro, M. L.; Wijma, R.; Masello, M.; Thomas, M. J.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 1, pp 717-735
Abstract

The common practice on most commercial dairy farms is to inseminate all cows that are eligible for breeding, while ignoring (or absorbing) the costs associated with semen and labor directed toward low-fertility cows that are unlikely to conceive. Modern analytical methods, such as machine learning...

Author(s)
Shahinfar, S.; Guenther, J. N.; Page, C. D.; Kalantari, A. S.; Cabrera, V. E.; Fricke, P. M.; Weigel, K. A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2015, 98, 6, pp 3717-3728
Abstract

Despite the widespread adoption of hormonal synchronization protocols that allow for timed artificial insemination (AI), detection of estrus plays an important role in the reproductive management program on most dairies in the United States. Increased physical activity is a secondary sign of estrus ...

Author(s)
Fricke, P. M.; Carvalho, P. D.; Giordano, J. O.; Valenza, A.; Lopes, G., Jr.; Amundson, M. C.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2014, 8, s1, pp 134-143
Abstract

Chemical pregnancy testing is an alternative to traditional methods of pregnancy diagnosis (either manual palpation or ultrasound) in postpartum dairy cows and heifers. The objective was to validate a chemical pregnancy test that confers the advantages of using whole blood, rapid incubation times,...

Author(s)
Mayo, L. M.; Moore, S. G.; Poock, S. E.; Silvia, W. J.; Lucy, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 9, pp 7634-7641
Abstract

Daughter superiorities of 240 Holstein bulls of the American Breeders Service (A.B.S.) and Eastern Artificial Insemination Cooperative (E.A.I.C.) were estimated from records of paternal sisters of the sire, dam's records, and records of daughters of the maternal grandsire. Estimated daughter...

Author(s)
VAN VLECK, L. D.; CARTER, H. W.
Citation
Journal of Dairy Science, 1972, 55, pp 214-217
Abstract

ALLAIRE, F. R. Another approach to the regression of yield on a contemporary yield average: 925-926.
ANDRUS, D. F., and FREEMAN, A. E. Age distribution, life expectancy, and culling practices in Iowa dairy herds: 939-940.
ARAVE, C. W., and LAMB, R. C. Effect of blood antigen, serum and milk protein ...

Citation
Journal of Dairy Science, 1969, 52, pp 879-948
Abstract

ALLAIRE, F. R. Probabilities arising from dairy sire evaluation models: 958-959.
ATKESON, G. W., MEADOWS, C. E., and McGILLIARD, L. D. Weighting components of type in classifying Holsteins: 977.
AULETTA, F. J., and BLACK, D. L. Effect of oxytocin and central nervous system stimulants on the bovine...

Citation
Journal of Dairy Science, 1968, 51, pp 925-990
Abstract

ABEL-AZIZ, A. S., BARR, G. R., and TYLER, W. J. Empirical analysis of models for estimating heritability: 986.
ACKERMAN, R. A., THOMAS, R. O., and BUTCHER, D. F. Effects of length of dry period on production: 976-977.
ALLAIRE, F. R. Selective value of milk yield among dairy cows: 973-974.
AEAVE, C. ...

Citation
Journal of Dairy Science, 1967, 50, pp 936-1017

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