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Abstract

The objectives were to evaluate pregnancy per artificial insemination (AI), days to first AI, and proportion pregnant within 7 d of AI eligibility in dairy heifers subjected to presynchronization compared with dairy heifers not presynchronized. Thirty days before AI eligibility, Holstein heifers...

Author(s)
Claypool, C. K.; Spencer, J. A.; Zoca, S. M.; Shafii, B.; Price, W. J.; Ahmadzadeh, A.; Rimbey, N. R.; Dalton, J. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 12, pp 11730-11735
AbstractFull Text

It was reasoned that technologies that increase the reproductive rate of males and females in dairy cattle would realize higher responses to selection. The authors tested this hypothesis using deterministic simulation of breeding schemes that resembled those of dairy cattle in Kenya. The response...

Author(s)
Sagwa, C. B.; Okeno, T. O.; Kahi, A. K.
Publisher
South African Society of Animal Science, Hatfield, South Africa
Citation
South African Journal of Animal Science, 2019, 49, 4, pp 654-663
Abstract

The reproductive parameters of dairy cattle have continuously declined worldwide over the last 50 years. Nutritional imbalances are identified as risk factors for this decrease of reproductive performance. The present paper aims to quantify the decrease in the pregnancy per artificial insemination...

Author(s)
Albaaj, A.; Jattiot, M.; Manciaux, L.; Saille, S.; Julien, C.; Foucras, G.; Raboisson, D.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 9, pp 8527-8536
Abstract

An efficient dairy herd must produce a living, healthy calf per cow per year, and it should be accomplished with a Calving-Conception Interval (CCI) no greater than 100 days. Objective: Describe CCI epidemiological aspects in specialized dairy cattle in Costa Rica during the 2000-2013 period....

Author(s)
Roche Loaiza, A. la; Vargas Leitón, B.; Camacho Sandoval, J.; Castillo Badilla, G.; Romero Zúñiga, J. J.
Publisher
Escuela de Medicina Veterinaria, Universidad Nacional de Costa Rica, Heredia, Costa Rica
Citation
Revista Ciencias Veterinarias, 2019, 37, 1, pp 27-45
Abstract

Dairy farming is an emerging enterprise in the semi-arid parts of Eastern Kenya and is constrained by inadequate feeding, poor heat detection methods, unreliable and expensive artificial insemination services, high incidence of infectious diseases among others. A cross-sectional study to establish...

Author(s)
Mungube, E. O.; Njarui, D. M. G.; Maichomo, M. W.; Olum, M. O.; Ndirangu, P. N.; Kabirizi, J.; Ndikumana, J.; Mwangi, G.
Publisher
CIPAV Foundation, Cali, Colombia
Citation
Livestock Research for Rural Development, 2019, 31, 6, pp Article 88
Abstract

In dairy production, high fertility contributes to herd profitability by achieving greater production and maintaining short calving intervals. Improved management practices and genetic selection have contributed to reversing negative trends in dairy cow fertility, but further progress is still...

Author(s)
Fleming, A.; Baes, C. F.; Martin, A. A. A.; Chud, T. C. S.; Malchiodi, F.; Brito, L. F.; Miglior, F.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 4, pp 3722-3734
Abstract

Artificial insemination is beginning to find its place in Algerian dairy cattle farms. The bovine artificial insemination (AI) assessments for a three-year period in the semi-arid wilaya of Sétif on 4 855 insemination acts carried out by 5 inseminators in 3 664 cows of 5 different breeds belonging...

Author(s)
Mouffok, C.; Allouni, A.; Semara, L.; Belkasmi, F.
Publisher
CIPAV Foundation, Cali, Colombia
Citation
Livestock Research for Rural Development, 2019, 31, 4, pp Article 49
Abstract

We hypothesised that use of reproductive technologies (RTs) would result in increases in economic and genetic gains of a dairy cattle breeding programme. A deterministic approach was used to compare RTs that can be utilised to increase dairy cattle productivity and profitability in Kenya. These...

Author(s)
Gicheha, M. G.; Akidiva, I. C.; Cheruiyot, R. Y.
Publisher
Springer Berlin, Heidelberg, Germany
Citation
Tropical Animal Health and Production, 2019, 51, 2, pp 473-475
Abstract

Fusion failure of the Müllerian ducts is thought to occur congenitally in cattle. We aimed to elucidate the contribution of incomplete fusion of the Müllerian ducts to reproductive difficulties in dairy cattle. We observed the vaginas of Holstein cattle to classify the anomalies into mild and...

Author(s)
Ishiyama, D.; Nakamura, Y.; Tanaka, T.; Magata, F.; Matsuda, F.; Maeda, K.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 123, pp 209-215
Abstract

The objective was to determine associations between behavior during head-lock restraint and reproductive performance in dairy heifers. Behavior of 817 Holstein heifers from four farms was evaluated at feeding (Days 0 and 7) while restrained in a self-locking stanchion. All heifers were assigned a...

Author(s)
Kasimanickam, V. R.; Staker, C.; Williams, H. M.; Kastelic, J. P.; Kasimanickam, R. K.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 121, pp 147-152

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