Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Divakar J, Ambrose"'
Publikováno v:
Frontiers in Animal Science, Vol 4 (2023)
The first objective of this study was to compare behavioral and ear temperature changes using accelerometer ear tags (CowManager system; Sensor) during the declining progesterone (P4) phase (expected estrus) and the luteal phase determined using in-l
Externí odkaz:
https://doaj.org/article/d0c79653b447437baf54c859f28400fa
Autor:
Patricio Ponce-Barajas, Marcos G. Colazo, Amir Behrouzi, Todd O. Ree, John P. Kastelic, Divakar J. Ambrose
Publikováno v:
Animals, Vol 13, Iss 14, p 2283 (2023)
There is evidence that replacing the gonadotropin-releasing hormone (GnRH) with porcine luteinizing hormone (pLH) to synchronize ovulation prior to artificial insemination (AI) increased pregnancy per AI in dairy cows without affecting blood progeste
Externí odkaz:
https://doaj.org/article/5e0e951f95884da69b575f642309ef43
Autor:
J.P. Rosadiuk, Helga Sauerwein, T.C. Bruinjé, F. Moslemipur, Divakar J. Ambrose, Michael A. Steele
Publikováno v:
Journal of Dairy Science. 104:1153-1163
The objectives were to investigate the effects of differing planes of pre- and postweaning nutrition on prepubertal serum leptin concentrations, LH profiles, and age at puberty in Holstein heifers. Thirty-six Holstein calves were randomly assigned to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87fb506bfa5a7b2ab7a85feb0b724d80
https://doi.org/10.3168/jds.2020-18810
https://doi.org/10.3168/jds.2020-18810
Autor:
Divakar J. Ambrose, J.P. Rosadiuk, J.E. Carrelli, T.C. Bruinjé, Michael A. Steele, F. Moslemipur
Publikováno v:
Journal of Dairy Science. 102:10514-10529
The objectives of this study were to investigate the carryover effects of differing pre- and postweaning planes of nutrition on prepubertal reproductive tract development and postpubertal estrous cycle characteristics in Holstein heifers. Heifer calv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4084fe43448b90dac4103085e3352149
https://doi.org/10.3168/jds.2019-16249
https://doi.org/10.3168/jds.2019-16249
Autor:
Timothy R Caldwell, T.C. Bruinjé, Marcos G. Colazo, Stephen P. Miller, Divakar J. Ambrose, Zhiquan Wang, Antoine Dourey, Patricio Ponce-Barajas
Publikováno v:
Canadian Journal of Animal Science. 99:456-464
The objectives of this study were to compare morphology, plasma and acrosome membrane integrities, and mitochondrial function in sperm of bulls selected for low- vs. high-residual feed intake (RFI)...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::776d15d9a47d867d39a23e24f574f507
https://doi.org/10.1139/cjas-2018-0103
https://doi.org/10.1139/cjas-2018-0103
Autor:
Divakar J. Ambrose, T.C. Bruinjé
Publikováno v:
Journal of Dairy Science. 102:3615-3621
The in-line milk analysis system (IMAS) is an automated biosensor technology that samples and quantifies milk progesterone concentrations (P4c) at frequent intervals starting early postpartum until pregnancy. The objective was to validate the use of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bc8dbd3e0b04857a6e5e64a6beae8d6
https://doi.org/10.3168/jds.2018-15692
https://doi.org/10.3168/jds.2018-15692
Publikováno v:
Applied Animal Science. 35:88-93
To determine the effect of the amount of milk fed on performance of dairy calves during weaning, 55 female Holstein calves were randomly assigned to either a high (10 L/d) or low (5 L/d) amount of whole milk on d 3 of life. Calves were assigned to 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a6e8c3e70d1fed21a7a3841e01aba16
https://doi.org/10.15232/aas.2018-01812
https://doi.org/10.15232/aas.2018-01812
Publikováno v:
Animal, Vol 15, Iss 7, Pp 100205-(2021)
Low estrus detection rates (>50%) are associated to extended calving intervals, low economic profit and reduced longevity in Holstein dairy cows. The objective of this study was to evaluate the accuracy of infrared thermography and behavioral biometr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d87d2da8f800ec8c33ca0f45c2b43bcd
http://www.sciencedirect.com/science/article/pii/S1751731121000471
http://www.sciencedirect.com/science/article/pii/S1751731121000471
Autor:
J.E. Carrelli, M. Gobikrushanth, Masahito Oba, M. Corpron, Divakar J. Ambrose, M.G. Colazo, I. Rajesh, A. Ahmadzadeh, W. Sandberg
Publikováno v:
Journal of dairy science. 104(7)
Anogenital distance (AGD), defined as the distance from the center of the anus to the base of the clitoris, in lactating dairy cows of first and second parity, has been reported to be inversely related to fertility and moderately heritable. Thus, AGD
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae3e63f1a60ba9e613c9c8d73cf2c4b3
https://pubmed.ncbi.nlm.nih.gov/33865592
https://pubmed.ncbi.nlm.nih.gov/33865592
Publikováno v:
Journal of Dairy Science. 102:780-798
Our objectives were to characterize parameters of luteal activity based on milk progesterone concentration (P4c) data from before and after artificial insemination (AI) and to evaluate their potential association with fertility in Holstein cows. Reco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bad87d19a312365844347c4c23b61a90
https://doi.org/10.3168/jds.2018-14654
https://doi.org/10.3168/jds.2018-14654