Zobrazeno 1 - 10
of 104
pro vyhledávání: '"J.C. Whittier"'
Autor:
Jose A Arce-Cordero, Jason K. Ahola, George E. Seidel, Ryan D Rhoades, S. L. Archibeque, Meredith A Harrison, J.C. Whittier
Publikováno v:
Translational Animal Science
The All Heifer, No Cow (AHNC) beef production system is an alternative to conventional cow/calf production that involves insemination of nulliparous heifers with sexed semen to produce female calves that are early weaned at 3 mo of age. Dams are fini
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fce93714a9c94ed2c5dfd9b44c01e617
https://pubmed.ncbi.nlm.nih.gov/33241192
https://pubmed.ncbi.nlm.nih.gov/33241192
Publikováno v:
The Professional Animal Scientist. 32:658-664
The effects of calf nose flap (NF) presence and duration on dam performance, steer carcass traits, and subsequent heifer fertility were evaluated. Angus and Angus × Hereford primiparous cows (n = 245) and calves at 2 locations were allocated to trea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a222b31a76de48cb03d6a6be7b4915b
https://doi.org/10.15232/pas.2015-01450
https://doi.org/10.15232/pas.2015-01450
Reticulo-rumen temperature as a predictor of calving time in primiparous and parous Holstein females
Autor:
R. K. Peel, Jason K. Ahola, J.C. Whittier, Zachary D. Weller, Júlio Otávio Jardim Barcellos, João Batista Gonçalves Costa
Publikováno v:
Journal of Dairy Science. 99:4839-4850
The objective of this research was to define and analyze drops in reticulo-rumen temperature (Trr) as an indicator of calving time in Holstein females. Data were collected from 111 primiparous and 150 parous Holstein females between November 2012 and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9839f476bc2041db8e164cb52f7eb601
https://doi.org/10.3168/jds.2014-9289
https://doi.org/10.3168/jds.2014-9289
Autor:
Johann F. Coetzee, B. J. Bigler, R. K. Peel, J. T. Fox, R. J. Callan, Terry E Engle, J.C. Whittier, Jason K. Ahola, L. W. Wulf, R. L. Giles, P. E. Repenning, J. T. French
Publikováno v:
Journal of Animal Science. 91:4965-4974
Two experiments evaluated the effects of band castration and oral administration of an anal- gesic in association with castration on performance and behavioral and physiological responses in yearling beef bulls. In Exp. 1 Angus and Charolais-crossbre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bd5c9cfc4c7161e7a868ac05acf58b2
https://doi.org/10.2527/jas.2012-6070
https://doi.org/10.2527/jas.2012-6070
Publikováno v:
The Professional Animal Scientist. 29:228-236
Beef heifers at 4 ranches were assigned to 1 of 2 estrus synchronization protocols: CIDR Select heifers received a controlled internal drug-release device (CIDR) on d 0, which was removed on d 14, gonadotropin-releasing hormone (GnRH) on d 23, and pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba9d37faf129bc34e3c7d9e75e026ba4
https://doi.org/10.15232/s1080-7446(15)30228-x
https://doi.org/10.15232/s1080-7446(15)30228-x
Autor:
J.C. Whittier, J. T. French, Jason K. Ahola, R. L. Giles, P. E. Repenning, George E. Seidel, R.K. Peel
Publikováno v:
The Professional Animal Scientist. 29:64-74
The effects of extended progestin exposure, gonadotropin-releasing hormone (GnRH) versus prostaglandin (PG) F 2α at controlled internal drug-release (CIDR) insertion, and GnRH on d 7 versus 9 of a 14-d CIDR on ovarian response and timed AI (TAI) pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5766020c8ddd537896e34db54790410c
https://doi.org/10.15232/s1080-7446(15)30197-2
https://doi.org/10.15232/s1080-7446(15)30197-2
Publikováno v:
The Professional Animal Scientist. 29:57-63
The objectives of this study were to compare lifetime productivity between heifers that conceived to AI or a clean-up bull via natural service (NS) as yearlings, and among females that were offspring of an AI or NS mating. Records (n = 6,693) on 1,17
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c67f564c9de15175716549a3b8c03e32
https://doi.org/10.15232/s1080-7446(15)30196-0
https://doi.org/10.15232/s1080-7446(15)30196-0
Publikováno v:
The Professional Animal Scientist. 28:623-627
The objective of this study was to compare fixed-time AI (TAI) pregnancy rates resulting from intervals of 2, 4, or 6 h between 2 prostaglandin (PG) F2α injections administered in a 5-d CO-Synch + controlled internal drug-release device (CIDR) estru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac305d60c14ce77a925ecd1026e12f79
https://doi.org/10.15232/s1080-7446(15)30420-4
https://doi.org/10.15232/s1080-7446(15)30420-4
Publikováno v:
The Professional Animal Scientist. 26:534-539
The objective of this study was to determine the effect of calf separation during the 12-h interval between 2 prostaglandin F 2α (PG) injections on fixedtime AI (TAI) pregnancy rate in beef cows synchronized with a 5-d CO-Synch + controlled internal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41f39c3ead129da47647f795aeb49feb
https://doi.org/10.15232/s1080-7446(15)30642-2
https://doi.org/10.15232/s1080-7446(15)30642-2
Publikováno v:
The Professional Animal Scientist. 26:341-346
Pregnancy diagnosis is widely practiced in cattle production systems. Ultrasonography is an alternative technique to rectal palpation for pregnancy diagnosis. Fetal losses caused by rectal palpation are well documented; however, reported losses from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b5b9e44d0dda314ac7ceab5de3b6977
https://doi.org/10.15232/s1080-7446(15)30613-6
https://doi.org/10.15232/s1080-7446(15)30613-6