Results 141 to 150 of about 3,714 (196)

Survival of fertilized ova from ewe lambs and adult ewes in the uteri of ewe lambs

Animal Reproduction Science, 1985
The cause of fertility differences between ewe lambs and adult ewes following natural oestrus were studied in Romneys. Insemination was determined by anterior vaginal swabbing. Fertilized ewe-lamb ova were returned to donor animals along with one matched fertilized adult ewe ovum and lambings were recorded.
W.H. McMillan, M.F. McDonald
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Behaviour of the ewe and lamb at lambing and its relationship to lamb mortality

Applied Animal Ethology, 1975
Arnold, G.W. and Morgan, P.D., 1975. Behaviour of the ewe and lamb at lambing and its relationship to lamb mortality. Appl. Anim. Ethol., 2: 25–46. A number of behavioural traits associated with the maternal instinct of sheep were studied under paddock conditions over a range of breeds, age, climate, nutrition and locations in five lambings in south
G.W. ARNOLD, P.D. MORGAN
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The effect of ewe body condition at lambing on the performance of ewes and their lambs at pasture

The Journal of Agricultural Science, 1980
SUMMARYEwes in body condition scores of 2·4 (thin) or 3·2 (fat) on a 5-point scale and suckling twin lambs were grazed at two stocking rates for the first 16 weeks of lactation. Paddocks were grazed for periods of 2 weeks at densities of 80 and 160 ewes/ha in weeks 1–8 and then 70 and 140 ewes/ha in weeks 9/16 of lactation.Intakes of herbage by ewes ...
M. J. Gibb, T. T. Treache
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Comparison of MOET in Texel ewe lambs and yearling ewes

Proceedings of the British Society of Animal Production (1972), 1994
Combined multiple ovulation and embryo transfer (MOET) from ewe lambs could significantly increase the rate of genetic progress in sheep improvement programmes (Smith, 1986). The benefits arise from a combination of an increased number of progeny from superior females and a reduction in the generation interval.
Wolf, BT, McDougall, I
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Sexual Season in Ewe Lambs

Nature, 1951
THE sexual season of ewe lambs lasts only a quarter to a third as long as that of adults1. In ewe lambs, sexual activity starts during November and December in Cambridge (N0)2, while it starts during June in New Zealand (S0)3; and consequently the sexual season coincides with the shortest days of the year irrespective of the hemisphere.
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Lamb Production from Summer Lambing Ewes

Proceedings of the British Society of Animal Production (1972), 1987
The majority of lamb production in Britain is concentrated in March and April resulting in a glut of lambs during July-September when the guaranteed price is at its lowest. Trials were carried out over 3 years to assess the feasibility of lambing hill and lowground ewes in early summer when grass is at its most productive and little concentrates are ...
Margaret E King, Beverley J Keeling
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Recognition of washed lambs by Merino ewes

Applied Animal Ethology, 1981
Abstract Ewes in six groups each of 12, that had been separated from their 2- to 8-day-old lambs for several hours, were individually presented with a choice between their own and two alien lambs. Each lamb was in a separate cage contiguous with a passageway in which the ewe was free to move.
G. ALEXANDER, D. STEVENS
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Nitrogen Metabolism by Lactating Ewes and Their Lambs

Journal of Animal Science, 1988
Twenty multiparous ewes and their newborn lambs were assigned to a 2 x 2 factorial experiment in which ewes were fed ad libitum either a moderate (MP, 15%) or a low (LP, 10%) CP diet and nursed either twin (T) or single (S) lambs. Nitrogen (N) balance trials were conducted on both the ewes and lambs during wk 2, 4 and 8 of lactation.
G P, Lynch, T H, Elsasser, T S, Rumsey, C, Jackson, L W, Douglass   +4 more
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VISUAL DISCRIMINATION BETWEEN EWES BY LAMBS

Applied Animal Ethology, 1978
Abstract Merino ewes that had been shorn shortly before lambing, or left unshorn, were run together from about 2 days after lambing. The behavioural responses of their lambs to alien shorn and unshorn ewes were observed in a test enclosure in which a ewe and lamb were released simultaneously from opposite ends.
G. Alexander, E.E. Shillito Walser
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The ‘critical period’ in the attachment of lambs and ewes

Animal Behaviour, 1966
Summary Ten Clun Forest ewes, two Half-breeds and nine Mules were separated from their lambs immediately after birth and moved to pens inside different barns. The period of separation ranged from 1 to 8 hr for the Clun Forest ewes, 10 min to 6 hr for the Mule ewes and was 5 min and 4 hr for the two Half-breed ewes; in all, thirty-seven lambs were ...
F V, Smith, C, Van-Toller, T, Boyes
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