Results 11 to 20 of about 125,988 (221)

Genetic Control of Canalization for Twinning Rates in Polypay and Rambouillet Sheep Using Threshold or Double Hierarchical Generalized Linear Models. [PDF]

J Anim Breed Genet
ABSTRACT In most sheep production systems, the ideal scenario is for every ewe to lamb and successfully raise twins. However, selection for increased number of lambs born (NLB) is often accompanied by a higher incidence of triplet and higher‐order births, which increases management challenges and producer reluctance to intensify selection for this ...
Wilson CS, Taylor JB, Brito LF.
europepmc   +2 more sources

Ewe-lamb bonding behaviours at birth are affected by maternal undernutrition in pregnancy [PDF]

, 2003
Maternal undernutrition in pregnancy results in low birth-weights and impaired postnatal survival in sheep. Largely anecdotal evidence suggests that the expression of appropriate maternal and neonate behaviours may also be disrupted by undernutrition. In
Dwyer, CM; id_orcid, Lawrence, Alistair, Lawrence, AB; id_orcid, Bishop, SC, Lewis, M, Dwyer, CM   +5 more
core   +1 more source

Effects of grass and maize silage feed value, offering soybean meal with maize silage, and concentrate feed level in late pregnancy, on ewe and lamb performance

Animal, 2021
In many countries, daily herbage accumulation on pasture declines towards zero during the winter period; thus, many pregnant ewes are housed and offered conserved forages supplemented with concentrate prior to parturition.
T.W.J. Keady, J.P. Hanrahan
doaj   +1 more source

Mean of ewe and lamb pregnancy outcomes by male ratio category.

, 2023
Mean of ewe and lamb pregnancy outcomes by male ratio category.
Tamir Alon (15440623), Alexander Rosov (3741586), Lila Lifshitz (15440626), Uzi Moallem (5942498)   +3 more
core   +1 more source

Pinealectomy delays puberty in ewe lambs [PDF]

Reproduction, 1985
Summary. Fifteen pinealectomized and 15 unoperated ewes were exposed to constant light for 3 weeks before and 10 weeks after lambing. Fourteen pinealectomized and 15 unoperated ewes were allowed to lamb outdoors. Five ewe lambs born in constant light to the 2 groups of dams were pinealectomized at 10 weeks of age.
D J, Kennaway, T A, Gilmore, E A, Dunstan   +2 more
openaire   +2 more sources

Plane of nutrition during the rearing phase for replacement ewes of four genotypes: II - effects on performance during first pregnancy and to weaning, and of their progeny

Animal, 2018
Plane of nutrition (PN) offered to ewe replacements during the rearing phase (8 to 17 months) and first pregnancy may affect reproductive and progeny performance when replacements are joined at ~19 months.
T.W.J. Keady, J.P. Hanrahan
doaj   +1 more source

Effects of ewe live weight and age on reproductive performance, lamb growth, and survival in Central Anatolian Merino sheep [PDF]

Archives Animal Breeding, 2015
The aim of this study was to evaluate the effects of premating ewe weight and age on ewe reproductive performance, lamb growth and survival in Central Anatolian Merino (CAM) sheep.
A. H. Aktaş, Ş. Dursun, Ş. Doğan, Z. Kiyma, U. Demirci, İ Halıcı   +5 more
doaj   +1 more source

A Survey of Farm Management Practices Relating to the Risk Factors, Prevalence, and Causes of Lamb Mortality in Ireland

Animals, 2021
Lamb mortality is a key factor influencing ewe productivity and profitability. The current study investigated risk factors associated with and management practices implemented on sheep farms to reduce lamb mortality.
Dwayne Shiels, Jason Loughrey, Cathy M. Dwyer, Kevin Hanrahan, John F. Mee, Timothy W. J. Keady   +5 more
doaj   +1 more source

Pasture Feeding in Late Pregnancy Does Not Improve the Performance of Twin-bearing Ewes and Their Lambs [PDF]

Asian-Australasian Journal of Animal Sciences, 2015
The present study evaluated the effect of controlled ryegrass-white clover herbage availability from day 128 until day 142 of pregnancy in comparison to unrestricted availability, on the performance of twin-bearing ewes of varying body condition score ...
R. A. Corner-Thomas, P. J. Back, P. R. Kenyon, R. E. Hickson, A. L. Ridler, K. J. Stafford, S. T. Morris   +6 more
doaj   +1 more source

Effects of Age at First Joining and Ewe Genotype on the Performance of Two-Tooth Ewes and That of Their Progeny to Slaughter

Animals, 2022
The effects of first-joining age (7 or 19 months) and genotype on ewe performance when joined to lamb at 2 years, and the performance of their progeny, were evaluated using 424 ewes, representing 3 genotypes: Belclare (Bel), Suffolk × Belclare (Suf × Bel)
Timothy W. J. Keady, James P. Hanrahan
doaj   +1 more source