Calm Temperament Improves Reproductive Performance of Beef Cows

2014 ◽  
Vol 49 (6) ◽  
pp. 1063-1067 ◽  
Author(s):  
R Kasimanickam ◽  
M Asay ◽  
S Schroeder ◽  
V Kasimanickam ◽  
JM Gay ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Beef Cows

Prepartum body condition and weight influences on reproductive performance of first-calf beef cows

1994 ◽  
Vol 72 (5) ◽  
pp. 1119-1125 ◽  
Author(s):  
S. M. DeRouen ◽  
D. E. Franke ◽  
D. G. Morrison ◽  
W. E. Wyatt ◽  
D. F. Coombs ◽  
...  
Keyword(s):  
Body Condition ◽  
Reproductive Performance ◽  
Beef Cows

Effects of postpartum fat supplementation and source on the reproductive performance of lactating young beef cows grazing cool-season grass pastures

2019 ◽  
Vol 35 (2) ◽  
pp. 185-198
Author(s):  
F. Añez-Osuna ◽  
G.B. Penner ◽  
J. Campbell ◽  
D. Damiran ◽  
M.E.R. Dugan ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Beef Cows ◽  
Cool Season ◽  
Fat Supplementation ◽  
Cool Season Grass

Reproductive Performance of Beef Cows Fed Whole Soybeans Before the Breeding Interval

2008 ◽  
Vol 24 (6) ◽  
pp. 639-647 ◽  
Author(s):  
N.M. Long ◽  
G.M. Hill ◽  
J.F. Baker ◽  
W.M. Graves ◽  
D.H. Keisler ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Beef Cows

Geographic determinants of copper and molybdenum concentrations in serum at the end of the grazing season and associations with reproductive performance in beef cows from western Canada

2011 ◽  
Vol 91 (3) ◽  
pp. 423-431 ◽  
Author(s):  
Leanne Van De Weyer ◽  
Cheryl Waldner
Keyword(s):  
Reproductive Performance ◽  
Important Determinant ◽  
Beef Cows ◽  
Western Canada ◽  
Serum Concentrations ◽  
Soil Color ◽  
Grazing Season ◽  
Cu Deficiency ◽  
The Mean ◽  
Feed Samples

Van De Weyer, L. M. and Waldner, C. L. 2011. Geographic determinants of copper and molybdenum concentrations in serum at the end of the grazing season and associations with reproductive performance in beef cows from western Canada. Can. J. Anim. Sci. 91: 423–431. Serum concentrations of Cu and Mo were measured at the end of the summer grazing season in an observational field study of 783 breeding females from 66 cow-calf herds located in western Canada. The mean Cu concentration was 0.82 ppm (S, 0.30 ppm) and the mean Mo concentration was 0.056 ppm (S, 0.055 ppm). Serum Cu concentration differed across ecoregions (P=0.013). Serum Mo concentrations varied by ecoregion (P =0.002), soil type (P =0.011), soil color (P=0.018), and total precipitation during the growing season (P =0.004). Copper and Mo serum concentrations at the end of the grazing season were not associated with reproductive outcomes. Herd location is an important determinant of the risk of primary and secondary Cu deficiency and can inform the need for trace mineral testing of feed samples as well as supplementation.

A maternal productive index for beef cows

1972 ◽  
Vol 12 (59) ◽  
pp. 573 ◽  
Author(s):  
RG Beilharz
Keyword(s):  
Beef Cattle ◽  
Reproductive Performance ◽  
Genetic Parameters ◽  
Selection Index ◽  
Beef Cows ◽  
Early Summer ◽  
Direct Measure ◽  
Important Goal ◽  
Genetic Progress ◽  
Cattle Breeding

To evaluate beef cows on their reproductive performance a maternal productive index (M.P.I.) was developed as an alternative to their evaluation in terms of simpler traits, or in terms of a conventional selection index based on simple traits. Data on M.P.I. were obtained from Hereford cows on three grazing treatments each containing three groups of cows differentiated by last breeding season (i.e. presence and age of calf at foot). The same cows were also scored for coat type on two occasions in late spring and early summer. The magnitude and change of coat score are explained by the hypothesis that nutritional stress delays the cycle of shedding of winter coat and its replacement by a sleek coat. Analysis of the correlations between coat score data and M.P.I. shows that low M.P.I. is also associated with a delay in change of coat type. This suggests that M.P.I. is an indication of adaptation of cows to their environment with poorly adapted animals suffering a greater stress. Because M.P.I. is a direct measure of a very important goal of beef cattle breeding it should be used widely in selection (or culling) of beef cows. Whether genetic progress will be faster than through the use of simpler traits, may be judged once genetic parameters have been estimated for M.P.I.

Heterosis in Reproductive Performance of Beef Cows

1968 ◽  
Vol 27 (2) ◽  
pp. 336 ◽  
Author(s):  
J. W. (Bill) Turner ◽  
B. R. Farthing ◽  
George L. Robertson
Keyword(s):  
Reproductive Performance ◽  
Beef Cows

Plasma fatty acids and reproductive performance of lactating beef cows fed rumen-protected fat

2012 ◽  
Vol 28 (1) ◽  
pp. 89-96 ◽  
Author(s):  
P. Moriel ◽  
E.P. Gonçalves ◽  
B.I. Cappellozza ◽  
V. Nayigihugu ◽  
E. Block ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Reproductive Performance ◽  
Beef Cows ◽  
Plasma Fatty Acids
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