Zobrazeno 1 - 10
of 54
pro vyhledávání: '"T. J. Parkinson"'
Publikováno v:
Small Ruminant Research. 115:67-70
Uterine restriction during gestation can result in the birth of lambs that are smaller than those born from an unrestricted environment. The objective of this study was to examine whether this effect is present during the early embryonic period. Pure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26a1fa21711bd1e489ee6e1f6910993c
https://doi.org/10.1016/j.smallrumres.2013.08.003
https://doi.org/10.1016/j.smallrumres.2013.08.003
Autor:
T. J. Parkinson, Paul R. Kenyon, Hugh T. Blair, R. K. Sharma, John F. Cockrem, C. M. C. Jenkinson
Publikováno v:
Journal of Animal Science. 90:1338-1348
Pure-bred embryos were transferred within and reciprocally between large (Suffolk) and small (Cheviot) breeds of sheep to establish 4 treatment groups: SinS (Suffolk embryos in Suffolk dams), SinC (Suffolk embryos in Cheviot dams), CinS (Cheviot embr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88736a9056ad52a289fcae3b7687ccf8
https://doi.org/10.2527/jas.2010-3800
https://doi.org/10.2527/jas.2010-3800
Publikováno v:
Small Ruminant Research. 93:186-192
The objectives of this study were to characterise reproductive and metabolic endocrinology parameters in Romney rams from lines selected since 1986, for high or low circulating IGF-1 concentrations. Seasonal changes were recorded in the patterns of I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7348fdd77b5df093f41661c9bf0fc454
https://doi.org/10.1016/j.smallrumres.2010.06.001
https://doi.org/10.1016/j.smallrumres.2010.06.001
Publikováno v:
New Zealand Journal of Agricultural Research. 53:29-35
Herbage intake was measured using n-alkanes (at age 10 and 13 months) and the pre- and post-grazing technique (at age 12 and 14 months) in 80 Angus heifers selected for high (Hi-Gr) or low (Lo-Gr) growth rate or high (Hi-Milk) or low (Lo-Milk) milk p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2cd6887f29d212296c8394f5295425f2
https://doi.org/10.1080/00288231003606062
https://doi.org/10.1080/00288231003606062
Publikováno v:
Veterinary Record. 158:789-795
In an abattoir survey conducted in south-west England, 15 of 6521 rams aged three to 12 months had hypospadias; in 27 others the scrotum was completely or partly divided, but they had no other abnormalities of the urinary or genital systems. The lesi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b62df29522853d9a2480f441c21ef48d
https://doi.org/10.1136/vr.158.23.789
https://doi.org/10.1136/vr.158.23.789
Publikováno v:
New Zealand Journal of Agricultural Research. 48:293-300
Mid pregnancy shearing of ewes has been associated with a short‐ to medium‐term increase in maternal thyroid hormone concentrations. To determine the role of this elevation in the observed changes in lamb birth weight and fibre characteristics, e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac1304d785aacf0ac9cb473a12430285
https://doi.org/10.1080/00288233.2005.9513659
https://doi.org/10.1080/00288233.2005.9513659
Publikováno v:
Animal Reproduction Science. 80:237-250
This study has localised oxytocin receptor (OTR) mRNA expression within the cervix of non-pregnant ewes and related this to changes in the sensitivity of the cervical musculature to administered oxytocin (OT) during the oestrous cycle by recording el
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08b200fa5c9ed4a24d667d21beb55945
https://doi.org/10.1016/j.anireprosci.2003.07.004
https://doi.org/10.1016/j.anireprosci.2003.07.004
Autor:
T. J. Parkinson, Ö. Uçar
Publikováno v:
Acta Veterinaria Hungarica. 51:103-109
The relationship between concentration of calcium ionophore A23187 and incubation time upon the proportion of spermatozoa undergoing acrosome reaction (AR) in vitro was investigated in rams from a commercial artificial insemination (AI) program. Two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d91c7f9ada6a1da325ec5f4ee149eab
https://doi.org/10.1556/avet.51.2003.1.10
https://doi.org/10.1556/avet.51.2003.1.10
Autor:
T. J. Parkinson, Brian K. Follett
Publikováno v:
Proceedings of the Royal Society of London. Series B: Biological Sciences. 259:1-6
The hypothesis that thyroid hormones are required for the expression of normal cycles of reproductive activity was tested in Soay rams, a widely used subject for studies on seasonality. Six rams were thyroidectomized and six sham-operated in October,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::659df2f90f59f6c105552c09ebb7df1f
https://doi.org/10.1098/rspb.1995.0001
https://doi.org/10.1098/rspb.1995.0001
Publikováno v:
Veterinary Record. 152:199-201
Freemartins are XX/XY chimaeras that develop as a result of the fusion of the placental circulation of at least one male and one female fetus. The pituitary glands of eight normal ewes at various stages of the oestrous cycle and three rams were compa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2bb4a0167688230ef62792f7f3b37ce
https://doi.org/10.1136/vr.152.7.199
https://doi.org/10.1136/vr.152.7.199