scholarly journals The Effect of Feeding Rosemary and Marjoram on Reproductive Performance of Rabbit Does Under Sinai Conditions

2016 ◽  
Vol 5 (1) ◽  
pp. 9-16
Author(s):  
Badawi Lobna ◽  
E. Bakr ◽  
M. Mousa ◽  
M. Abdel Ghaffar
Keyword(s):  
Reproductive Performance ◽  
Effect Of Feeding

The effect of feeding endophyte infected tall fescue seed on reproductive performance in female rats

1987 ◽  
Vol 87 (1) ◽  
pp. 171-175 ◽  
Author(s):  
D.R. Varney ◽  
M. Ndefru ◽  
S.L. Jones ◽  
R. Newsome ◽  
M.R. Siegel ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Tall Fescue ◽  
Female Rats ◽  
Effect Of Feeding

The effect of feeding supplements in the autumn on the reproductive performance of grazing ewes 2. Feeding supplements in relation to sward height

1992 ◽  
Vol 54 (2) ◽  
pp. 249-258 ◽  
Author(s):  
R. G. Gunn ◽  
J. R. Jones ◽  
D. A. Sim
Keyword(s):  
Body Condition ◽  
Reproductive Performance ◽  
Live Weight ◽  
Corpora Lutea ◽  
Mating Period ◽  
Sward Height ◽  
Negative Effect ◽  
Repeated Experiment ◽  
Effect Of Feeding ◽  
Lambing Rate

AbstractThe effects of feeding supplements in relation to sward height in the autumn on the reproductive performance of ewes grazing predominantly perennial ryegrass swards were studied in four experiments with three genotypes. Treatments in which either no supplements were given or supplements were offered according to the height of the sward were compared when ewes were grazed on swards which were managed to decline in height from > 5 cm to 2·5 cm either before or after mating. At a sward height of < 3·5 cm, 400 g ground and pelleted barley was offered per head per day; at < 3·0 cm, 700 g was offered; and, at < 2·5 cm, hay was offered in addition to the barley. Responses to these treatments were compared with that of a treatment in which a sward was maintained at > 5 cm. Sward heights were controlled by varying stocking rate. In experiment 1, with 305 Scottish Blackface ewes, supplementation was not necessary until after the start of the mating period. In experiment 2, with 200 Brecknock Cheviot ewes, the supplementation protocol was examined on swards declining in height either before or after a synchronized mating. Experiment 3 repeated experiment 2 with 200 Beulah Speckled-face ewes and experiment 4 repeated only the pre-mating phase of experiment 3 with 195 Beulah Speckled-face ewes.In experiment 1, ovulation, ova loss and potential lambing rates were determined from the number of corpora lutea and viable embryos at slaughter at 8 to 10 weeks after the start of mating in 103 ewes and lambing rate was determined from the number of lambs at lambing in the remaining 202 ewes. In experiments 2, 3 and 4, ovulation, ova loss and potential lambing rates were determined from the number of corpora lutea and viable embryos at slaughter at return to service or at 4 weeks after a synchronized first mating.Grazing a sward declining in height below 3·5 cm in the pre-mating period significantly reduced ewe live weight, body condition and reproductive performance, particularly in the relatively prolific Beulah Speckled-face breed, compared with grazing a sward maintained at > 5 cm. Supplementation at the levels offered overcame some of the effects of the lower sward height treatment in the pre-mating period but did not compensate fully. Grazing a sward declining in height below 3·5 cm in the post-mating period, although reducing ewe live weight and body condition, had little effect on reproductive performance, compared with that achieved on a sward maintained above 4 cm. Supplementation at the levels offered at the lower sward height during the post-mating period produced no increase in overall reproductive performance and had a negative effect on some reproductive parameters.

Effect of feeding regime during rearing and subsequent pregnancies on body conditions and reproductive performance of sows over the first four parities

1991 ◽  
Vol 1991 ◽  
pp. 6-6
Author(s):  
P.H. Simmins ◽  
S.A. Edwards ◽  
H.H. Spechter ◽  
J.E. Riley
Keyword(s):  
Reproductive Performance ◽  
Management Practices ◽  
Feeding Practices ◽  
Feeding Regime ◽  
Feeding Regimes ◽  
Effect Of Feeding

Greater demands have been imposed by present-day management practices on the modern dam with gilts being bred at younger ages and lower levels of back fat. This has raised questions over whether current rearing feeding practices and low pregnancy feeding regimes may have adverse influences on lifetime reproductive performance. The objectives of this experiment were to compare the reproductive performance of sows given different feeding regimes during rearing and pregnancy. Data previously reported from the experiment have shown that the weight and back fat depth of the gilt can be manipulated by feeding regime during rearing and pregnancy (Simmins et al. 1989). Sows reared on lower feed levels were more prolific in their first two litters but they also had longer farrowing intervals (Edwards et al. 1989). Further results up to the fourth parity are described here.

A note on the effect of feeding regime on the performance of sows housed in a novel group-housing system

1989 ◽  
Vol 49 (3) ◽  
pp. 523-526 ◽  
Author(s):  
J. Carol Petherick ◽  
Judith K. Blackshaw
Keyword(s):  
Adverse Effects ◽  
Reproductive Performance ◽  
Housing System ◽  
Group Housing ◽  
Feeding Regime ◽  
Feeding Regimes ◽  
Ad Libitum ◽  
Short Time ◽  
Effect Of Feeding ◽  
Food Trough

The effects on sow reproductive performance of three feeding regimes (ration (R), ad libitum (A) and ration + straw (R + S)), in conjunction with partial barriers placed along the food trough, were investigated. Three groups of four sows were put on the regimes, in a group-housing system, over three consecutive gestations. Each trial lasted 13 days and took place during the first half of the gestation period. Sows on A ate about three times the amount of food that was allocated to them on R and R + S (2 kg per sow per day). Feeding regime did not affect any of the measures of reproductive performance (numbers of piglets liveborn, stillborn, weaned, birth and weaning weights). Sows of parity 7 and over had significantly fewer liveborn and more stillborn piglets compared with parities 2 to 6 (P < 0·05). It is probable that no adverse effects of the feeding regimes were found due to the short time that the sows were on them and because multiparous animals were used. It is suggested that the welfare of ration-fed sows, whose appetite is not satiated, is jeopardized and that this problem may be solved by the provision of fibrous foodstuffs.

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