Effect of dietary protein supplementation on performance of West African Dwarf (WAD) does during pregnancy and lactation

2007 ◽  
Vol 71 (1-3) ◽  
pp. 200-204 ◽  
Author(s):  
P.A. Nnadi ◽  
T.N. Kamalu ◽  
D.N. Onah
1991 ◽  
Vol 4 (3) ◽  
pp. 245-255 ◽  
Author(s):  
M.K. Adenuga ◽  
B.J. Tolkamp ◽  
A.A. Ademosun ◽  
G. Montsma ◽  
B.O. Brouwer

2020 ◽  
Vol 44 (2) ◽  
pp. 161-172
Author(s):  
O. O. Adewumi ◽  
N. Okwelum ◽  
T. J. Williams ◽  
I. J. James ◽  
O. S. Sowande ◽  
...  

This study was conducted to evaluate the effect of protein supplementation at 12%, 14% and 16.41% crude protein (CP) levels on the milk yield of West African dwarf dams. A total of twelve lactating dams, which were intensively managed and hand-milked on weekly basis were used for the study. Feed intakes, weight gain, feed conversion ratio (FCR) and protein efficiency ratios (PER) were monitored. Milk and blood samples were taken. The udder morphometry and milk composition were determined. Result showed that the dry matter and crude protein values ranged between 89.7 and 90.1% and 11.51 and 14.88% respectively. Dams on 12% protein supplemented feed recorded the highest daily dry matter intake (DMI) of (203.63 g/day) while, 16% protein supplemented feed had the least DMI (195.54 g/day). The value of crude fiber ranged between 9.98 and 13.31% while the value of ash ranged between 6.23 and 9.99%. Also, the values of ether extract ranged between 2.88 and 6.65%. Dams on 16% protein diet gained significantly (p<0.05) more weight (106.19g/day) and had the least feed conversion ratio (1.88). Milk component and nutrient digestibility did not vary among diets except for ether extract that was least in dams on 16% CP level. Dams on 14% and 16% protein diet supported the highest calcium concentration. Udder parameters and blood indices were not significantly (p>0.05) influenced by dietary protein levels. The rectal, espiratory and pulse rate were within the normal range. Pulse rate was more normal in dams on 12% and 16% dietary protein level. It can therefore be concluded that 16% crude protein level could be used for lactating West African dwarf dams to improve milk production and health condition of lactating dams.


2015 ◽  
Vol 42 (2) ◽  
pp. 180-186
Author(s):  
T. O. Ososanya

Four low cost feed samples were formulated using 0, 25, 50 and 75% levels of broiler litter processed into feed along with other feed ingredients. Sixteen (16) primiparous West African Dwarf (WAD) ewes aged between twelve and eighteen months old were dewormed using Ivermectin and dipped against ticks and fleas using diazintol. Oestrus was artificially synchronized in all the ewes using Iml of Prostaglandin - 2Fα administered intramuscularly, the animals were mated with rams of known fertility and lineage bred. Ewes were evaluated in a pregnancy trial while the lambs born were evaluated in a pre weaning growth trial. All the ewes were weighed before conception and bimonthly thereafter until parturition. The parameters studied were weight at mating, weight before and after parturition, weight changes during pregnancy, weight changes in lactation and nursing, lambs birth weights and daily weight of lambs, dam's weight at weaning and gestation length. Results obtained showed weight at mating, weight before mating, weight at parturition, gestation length, weight gain in pregnancy, weight change in lactation and nursing, lambs birth weights and daily weight gain of lambs were significantly affected (p<0.05) while dam's weight at weaning and lambs' weaning weight were not affected (p>0.05). Results of this study indicate that inclusion of broiler litter up to 50% in feed mixtures of ewes has no deleterious effect on the performance and health status of ewes during pregnancy and lactation.


Food Chain ◽  
2019 ◽  
Vol 8 (1-2) ◽  
pp. 58-78
Author(s):  
Bazit Bakare ◽  
Olufemi Onifade ◽  
Victoria Ojo ◽  
Kafayat Adebayo ◽  
Anandan Samireddypalle

2000 ◽  
Vol 80 (4) ◽  
pp. 633-642 ◽  
Author(s):  
Palle V. Rasmussen ◽  
Christian F. Børsting

The effect of different and shifting dietary protein levels on hair growth and the resulting pelt quality in mink was studied. Two groups of pastel female mink were fed either 59% (high protein, HP) or 40% (low protein, LP) of metabolisable energy (ME) from protein during pregnancy and lactation. Shortly after weaning, kits from females fed the LP diet were put on a new LP diet (21% protein of ME). Kits from females fed HP were randomly distributed to four experimental groups fed a new HP diet (34% protein of ME) and three of these groups were shifted to diets with 21% protein at different times during June until September. Skin biopsies were taken at 4, 6, 23 and, 29 wk of age. Histological techniques and computer-assisted light microscopy were used to determine the ratio of activity (ROA) of underfur and guard hairs, respectively, defined as the number of growing hairs as a percentage of the total number of hairs. The hair fibre length and thickness were determined by morphometric methods and correlated with fur properties of dried pelts judged by sensory methods. It was documented that 40% of ME from protein during pregnancy and lactation was sufficient for mink kits to express their genetic capacity to produce hair follicles. In males, a reduced protein level from the age of 15 wk or 22 wk until pelting disturbed moulting, indicated by a low ROA of underfur hairs at 23 wk, and consequently reduced the growth and development of the winter coat. A constantly low protein level from conception until the age of 29 wk did not disturb moulting, but led to a reduction of primeness and especially of the underfur length and fibre thickness of the winter coat. A low protein level from the age of 9 wk only reduced the thickness of the underfur fibres. Hair growth, final fur volume, and general quality of the winter coat of males were influenced negatively and to the same degree in all groups fed the LP diet in part of the growth period. The number of underfur hairs per area (hair density) of the winter coat was not influenced by the dietary treatment meaning that the protein content of 21% of ME in the LP diet was high enough for the mink to express its genetic capacity to develop hair follicles. However, this low protein content led to a reduction of hair fibre length and hair fibre thickness of the underfur. Overall, this study demonstrated that hair growth and hair properties in pelts are very dependent on the dietary protein supply in the period from 22 wk of age until pelting, irrespective of the supply in the preceding periods. Key words: Fur properties, hair fibres, nutrition, pelage, protein requirement


Sign in / Sign up

Export Citation Format

Share Document