Zobrazeno 1 - 10
of 78
pro vyhledávání: '"D.D Lunstra"'
Publikováno v:
The Professional Animal Scientist. 21:195-199
Reproductive traits were measured for 234 bulls and 1184 heifers from matings of three dam breeds (Angus, Hereford, and MARC III) with six sire breeds (Angus, Hereford, Brahman, Boran, Tuli, and Belgian Blue) from the Germ Plasm Evaluation (GPE) Prog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55cf12d1aba445925a6b62167cc4783c
https://doi.org/10.15232/s1080-7446(15)31202-x
https://doi.org/10.15232/s1080-7446(15)31202-x
Publikováno v:
Hormones and behavior. 26(1)
Two behavioral trials were conducted to determine the endocrine response of cortisol (C), luteinizing hormone (LH), testosterone (T), prolactin (PRL), and growth hormone (GH) in adult rams during exposure to estrous ewes during the breeding and nonbr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::773892aa5fd34d7e6e9828359ee0069c
https://pubmed.ncbi.nlm.nih.gov/1563732
https://pubmed.ncbi.nlm.nih.gov/1563732
Autor:
D.D. Lunstra, D.B. Laster
Publikováno v:
Theriogenology. 18:373-382
Twelve mature Angus bulls possessing similar semen quality were used to study the effects of single and multiple services and single-sire and multiple-sire mating on pregnancy rate of beef heifers. Heifers were observed for natural estrus twice daily
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fc79f77496311ac647d9d89f07134ac
https://doi.org/10.1016/0093-691x(82)90159-5
https://doi.org/10.1016/0093-691x(82)90159-5
Publikováno v:
Theriogenology. 19:555-563
An experiment was conducted to assess the effect of clitoral stimulation on pregnancy rate to artificial insemination in 1,856 beef females. For unadjusted data, pregnancy rate to first service in nonstimulated females was 61% for cows and 59% for he
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ba85398f5b3ec0d8eab22cec94450a0
https://doi.org/10.1016/0093-691x(83)90176-0
https://doi.org/10.1016/0093-691x(83)90176-0
Publikováno v:
Theriogenology. 26:101-109
Spermatozoa were not found in the urine collected from 12 bulls before electroejaculation, whereas spermatozoa were found in the urine collected after electroejaculation. The concentration of spermatozoa in four consecutive samples of urine collected
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4d091977304f9d88c84838ae9d0be2f
https://doi.org/10.1016/0093-691x(86)90116-0
https://doi.org/10.1016/0093-691x(86)90116-0
Autor:
S.E. Echternkamp, D.D. Lunstra
Publikováno v:
Theriogenology. 10:65-71
The interval from onset of estrus to preovulatory luteinizing hormone (LH) release, conception and fertilization rates, and number of accessory spermatozoa per ovum at 48 hr postmating in untreated cyclic ewes and in progestogen-pregnant mare serum g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3a1feab227bcda47f5be28c28a8b142
https://doi.org/10.1016/0093-691x(78)90081-x
https://doi.org/10.1016/0093-691x(78)90081-x
Publikováno v:
Theriogenology. 30(1)
Scrotal circumference, testicular length and body weight were measured in 3,090 yearling bulls of 12 breed groups finishing growth performance tests during a 5 yr period. Breeds were Limousin, Hereford, Charolais, Angus, Red Poll, Simmental, Pinzgaue
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d3a490a5c38ed3d7b700b5462f8860c
https://pubmed.ncbi.nlm.nih.gov/16726456
https://pubmed.ncbi.nlm.nih.gov/16726456
Publikováno v:
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.). 145(1)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c757a05774fce3d4c2a30782304c78ef
https://pubmed.ncbi.nlm.nih.gov/4130371
https://pubmed.ncbi.nlm.nih.gov/4130371
Autor:
S.E. Echternkamp, D.D. Lunstra
Publikováno v:
Theriogenology. 29(4)
A procedure for testicular biopsy was developed and tested in rams at 14, 18 and 22 wk of age. The biopsy procedure produced a tissue sample with minimal cell-to-cell disruption and caused no detectable detriment to testicular development in rams. At
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0945d54b93b8f40891a95e6a3ef91842
https://pubmed.ncbi.nlm.nih.gov/16726401
https://pubmed.ncbi.nlm.nih.gov/16726401
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