Results 171 to 180 of about 125,988 (221)

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
openaire   +1 more source

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.
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +2 more sources

Survival of lambs from maiden ewes may not be improved by pre-lambing exposure to mature lambing ewes

Animal Production Science, 2016
The survival of lambs born to ewes at their first (maiden) lambing is generally lower than for those born to ewes which have previously lambed, and poor maternal behaviour is a contributing factor. This study examined whether pre-lambing exposure of maiden ewes to multiparous lambing ewes would improve the survival of lambs born to maiden ewes ...
S. M. Robertson, M. B. Allworth, M. A. Friend   +2 more
openaire   +1 more source

Effect of ewe ovine lentivirus infection on ewe and lamb productivity

Preventive Veterinary Medicine, 1997
We used a previously described sensitive and specific ovine lentivirus (OLV) recombinant transmembrane (rTM) protein enzyme-linked immunosorbent assay (ELISA) to detect anti-OLV antibodies and define OLV infection in breeding ewes from nine US Meat Animal Research Center (MARC) flocks. We estimated the production impacts of dam rTM ELISA seropositivity
J E, Keen, L L, Hungerford, E T, Littledike, T E, Wittum, J, Kwang   +4 more
openaire   +2 more sources

Medicating feeds for early lambing ewes

Veterinary Record, 2012
THE antiprotozoal agent decoquinate is added under prescription to feeds for in-lamb ewes for two purposes: in early pregnancy to prevent toxoplasmosis, and in the weeks before and after lambing to prevent coccidiosis in the …
openaire   +2 more sources

Reduced survival of lambs from maiden ewes exposed to mature ewes pre-lambing

Small Ruminant Research, 2017
Abstract The suboptimal survival of new-born lambs is a major source of reproductive inefficiency, is often lower in maiden (first-lambing) compared with multiparous ewes, and this may be associated with poor maternal behaviour due to inexperience.
S.M. Robertson, M.B. Allworth, M.A. Friend   +2 more
openaire   +1 more source