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Animal Science Database

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Abstract

Genetic evaluation records for the Canadian Holstein, Ayrshire, Jersey, and Brown Swiss bulls and cows born from 1950 and 1960, respectively, were used to study the generation intervals (L) along the four-path selection model. The objectives of the study were to determine the L in the four dairy...

Author(s)
Hagan, B. A.; Cue, R.
Publisher
NRC Research Press, Ottawa, Canada
Citation
Canadian Journal of Animal Science, 2020, 100, 1, pp 175-183
AbstractFull Text

Aim: The aim of this study was to determine the effect of target breeding and presynch-ovsynch synchronization protocols on the conception rate in the first insemination in Holstein breed cows. Materials and Methods: Study material was consisted of 160 healthy Holstein cows within 30-35 days...

Author(s)
Alkan, K. K.; Alkan, H.
Publisher
Selcuk Universitesi Veteriner Fakultesi, Konya, Turkey
Citation
Eurasian Journal of Veterinary Sciences, 2020, 36, 1, pp 36-41
AbstractFull Text

The present study aimed to evaluate whether the induction and the formation of an accessory corpus luteum (CL) after AI might increase the pregnancy per AI (P/AI) in heat stressed dairy cows. Starting at d 50±3 post-partum, 113 lactating Holstein cows from one commercial herd during summer were...

Author(s)
Stojanov, B.; Atanasov, B.; Grizelj, J.; Vince, S.; Nikolovski, M.; Kjosevski, M.; Dovenski, T.; Adamov, N.; Ilievska, K.; Samardzija, M.
Publisher
Sciendo, Warsaw, Poland
Citation
Macedonian Veterinary Review, 2020, 43, 1, pp 37-43
AbstractFull Text

Pre-synchronization prior to Ovsynch protocol is an efficient method to improve ovulation and pregnancy rate in dairy cows. The objective of this study was to define the effect of Double-Ovsynch (DOS; GnRH, PGF 7 d later and GnRH 2 d later followed by the OVS protocol with interval of 7 d; timed...

Author(s)
Channa, A. A.; Aleem, M.; Jabbar, M. A.; Monir, H.; Ahmad, N.
Publisher
Pakistan Agricultural Scientists Forum, Lahore, Pakistan
Citation
JAPS, Journal of Animal and Plant Sciences, 2020, 30, 1, pp 255-259
Abstract

The objective of this article was to investigate the efficiency of GnRH administrations at different time points after induced luteolysis on pregnancy rates in low-yielding subfertile cows. One thousand six hundred and ten healthy and subfertile dairy cows of different ages and races were used in...

Author(s)
Uslu, B. A.; Kocyigit, A.; Sendag, S.; Gülyüz, F.; Wehrend, A.
Publisher
Springer Berlin, Heidelberg, Germany
Citation
Tropical Animal Health and Production, 2020, 52, 2, pp 497-502
Abstract

Neospora caninum infection has been reported in a large number of intermediate hosts, such as ruminants, rabbits, mice, etc. but neosporosis has emerged as a serious disease in cattle and dogs worldwide. Abortions and other infertility issues have been reported in the infected cows, leading to...

Author(s)
Lefkaditis, M.; Mpairamoglou, R.; Sossidou, A.; Spanoudis, K.; Tsakiroglou, M.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Veterinary Parasitology: Regional Studies and Reports, 2020, 19, pp 100365
Abstract

Our objectives were to test the efficacy of intravaginal (IVG) administration of PGF to induce corpus luteum (CL) regression, compare circulating progesterone (P4) profiles in cows receiving IVG versus intramuscular (IM) treatment with PGF, and evaluate reproductive outcomes. Lactating Holstein ...

Author(s)
Masello, M.; Scarbolo, M.; Schneck, M. V.; Perez, M. M.; Schillkowsky, E. M.; Sitko, E. M.; Hernandez, F. S.; Cabrera, E. M.; Rossi, R. M.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2020, 103, 3, pp 2743-2755
Abstract

One strategy for improving fertility in cattle is administration of GnRH or human chorionic gonadotropin (hCG) during the luteal phase, which increases progesterone (P4) secretion and delays luteolysis. To provide an overview of how GnRH or hCG treatment between 4 and 15 d after artificial ...

Author(s)
Besbaci, M.; Abdelli, A.; Minviel, J. J.; Belabdi, I.; Kaidi, R.; Raboisson, D.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2020, 103, 2, pp 2006-2018
Abstract

Understanding the preferences of dairy cattle producers when selecting beef bulls for mating can help inform beef breeding programs as well as provide default parameters in mating advice systems. The objective of the present study was to characterize the genetic merit of beef artificial ...

Author(s)
Berry, D. P.; Ring, S. C.; Twomey, A. J.; Evans, R. D.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2020, 103, 2, pp 1701-1710
Abstract

The objective of the current study was to examine phenotypic fertility performance and survival, and to gain insight into underlying factors that may contribute to greater fertility performance in 2 divergent genetic groups (GG) of Holstein-Friesian, selected using the Irish Economic Breeding Index ...

Author(s)
O'Sullivan, M.; Butler, S. T.; Pierce, K. M.; Crowe, M. A.; O'Sullivan, K.; Fitzgerald, R.; Buckley, F.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2020, 103, 2, pp 1685-1700

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