Genetic parameters of production, feed intake, body weight, body composition, and udder health in lactating dairy cows

2002 ◽  
Vol 77 (1) ◽  
pp. 23-34 ◽  
Author(s):  
E. Søndergaard ◽  
M.K. Sørensen ◽  
I.L. Mao ◽  
J. Jensen
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Dairy Cows ◽  
Feed Intake ◽  
Genetic Parameters ◽  
Udder Health ◽  
Lactating Dairy Cows

Prediction of body weight and composition in lactating dairy cows: Relationship between body condition score and body composition

2005 ◽  
Vol 2005 ◽  
pp. 19-19
Author(s):  
T. Yan ◽  
R. E. Agnew ◽  
C. S. Mayne
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Dairy Cows ◽  
Milk Production ◽  
Body Condition ◽  
Body Condition Score ◽  
Early Lactation ◽  
Lactating Dairy Cows ◽  
Condition Score ◽  
Body Concentration

Body condition of lactating dairy cows varies at different stages of lactation. Cows usually mobilise their body reserves to provide energy and protein for milk production in early lactation, and gain weight to deposit energy and protein for pregnancy at a later stage. The objective of the present study was to examine relationships between body condition score (CS) and body concentration of lipid, CP and energy.

Prediction of body weight and composition in lactating dairy cows: Prediction of empty body contents of lipid and crude protein

2005 ◽  
Vol 2005 ◽  
pp. 18-18
Author(s):  
R. E. Agnew ◽  
T. Yan ◽  
M. G. Porter
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Dairy Cows ◽  
Crude Protein ◽  
Accurate Prediction ◽  
Prediction Equations ◽  
Live Animal ◽  
Lactating Dairy Cows ◽  
Animal Data ◽  
Management Regimes

The accurate prediction of body composition of dairy cows is important for developing appropriate nutritional and management regimes. The objective of the present study was to develop prediction equations for empty body (EB) composition of lactating dairy cows using body weight and other live animal data.

Prediction of body weight and empty body composition using body size measurements in lactating dairy cows

2009 ◽  
Vol 124 (1-3) ◽  
pp. 233-241 ◽  
Author(s):  
T. Yan ◽  
C.S. Mayne ◽  
D.C. Patterson ◽  
R.E. Agnew
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Body Size ◽  
Dairy Cows ◽  
Lactating Dairy Cows

Effects of body weight loss on serum progesterone concentrations of non-lactating dairy cows

2011 ◽  
Vol 75 (1) ◽  
pp. 131-137 ◽  
Author(s):  
R.O. Rodrigues ◽  
C. Trevisanuto ◽  
R.F. Cooke ◽  
J.L.M. Vasconcelos
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Dairy Cows ◽  
Body Weight Loss ◽  
Serum Progesterone ◽  
Lactating Dairy Cows

scholarly journals Effect of the Addition of Various Levels of Green Tea Grounds Silage at on the Feed Intake and Milk Production in Lactating Dairy Cows

2005 ◽  
Vol 76 (3) ◽  
pp. 295-301 ◽  
Author(s):  
Bayaru ERUDEN ◽  
Takehiro NISHIDA ◽  
Hiroki MATSUYAMA ◽  
Kenji HOSODA ◽  
Shigeru SHIOYA
Keyword(s):  
Dairy Cows ◽  
Green Tea ◽  
Milk Production ◽  
Feed Intake ◽  
Lactating Dairy Cows

scholarly journals PSVIII-38 Late-Breaking Abstract: Estimating genetic parameters of feed efficiency traits in American mink

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 347-347
Author(s):  
Pourya Davoudi ◽  
Duy Ngoc Do ◽  
Guoyu Hu ◽  
Siavash Salek Ardestani ◽  
Younes Miar
Keyword(s):  
Body Weight ◽  
Genetic Correlation ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Fixed Effects ◽  
Genetic Parameters ◽  
American Mink ◽  
Genetic Correlations ◽  
Final Body Weight ◽  
Selection For

Abstract Feed cost is the major input cost in the mink industry and thus improvement of feed efficiency through selection for high feed efficient mink is necessary for the mink farmers. The objective of this study was to estimate the heritability, phenotypic and genetic correlations for different feed efficiency measures, including final body weight (FBW), daily feed intake (DFI), average daily gain (ADG), feed conversion ratio (FCR) and residual feed intake (RFI). For this purpose, 1,088 American mink from the Canadian Center for Fur Animal Research at Dalhousie Faculty of Agriculture were recorded for daily feed intake and body weight from August 1 to November 14 in 2018 and 2019. The univariate models were used to test the significance of sex, birth year and color as fixed effects, and dam as a random effect. Genetic parameters were estimated via bivariate models using ASReml-R version 4. Estimates of heritabilities (±SE) were 0.41±0.10, 0.37±0.11, 0.33±0.14, 0.24±0.09 and 0.22±0.09 for FBW, DFI, ADG, FCR and RFI, respectively. The genetic correlation (±SE) was moderate to high between FCR and RFI (0.68±0.15) and between FCR and ADG (-0.86±0.06). In addition, RFI had low non-significant (P > 0.05) genetic correlations with ADG (0.04 ± 0.26) and BW (0.16 ± 0.24) but significant (P < 0.05) high genetic correlation with DFI (0.74 ± 0.11) indicating that selection for lower RFI will reduce feed intake without adverse effects on the animal size and growth rate. The results suggested that RFI can be implemented in genetic/genomic selection programs to reduce feed intake in the mink production system.

Effect of exercise duration on feed intake and body composition of Swiss albino mice

1985 ◽  
Vol 58 (2) ◽  
pp. 500-505 ◽  
Author(s):  
R. Bulbulian ◽  
K. K. Grunewald ◽  
R. R. Haack
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Protein Content ◽  
Feed Intake ◽  
Exercise Duration ◽  
The Body ◽  
Control Group ◽  
Swiss Albino Mice ◽  
Daily Exercise ◽  
Albino Mice

The purpose of this study was to examine the effects of daily exercise of varying duration on the body composition, weight, and feed intake of mature Swiss albino mice. Fifty-four male mice were equally divided into a control group and five exercise groups (n = 9) performing 20, 40, 60, 120, and 240 min of daily exercise on a treadmill (7.2 m/min). Feed intake and body weight were measured weekly for 10 wk. At the completion of the study the mice were killed and the animal carcasses were chemically analyzed for fat, dry matter, and protein content. The results of this study demonstrate no differences in the body weight among groups (P less than 0.97) with all groups gaining 4.5–5.8 g during the 10-wk period. However, fat content decreased significantly from 15.7% in the control to 12.0% in the 120- and 240-min exercise groups (P less than 0.05). In contrast, protein content showed an insignificant rising trend from 13.0 to 14.6% with increasing duration of exercise. Feed intake showed a nonsignificant drop during the 20-min exercise treatment and remained unchanged among groups. These data show a slight but variable appetite-suppressing effect of light exercise in mice accompanied by favorable body composition changes even in the absence of differences in body weight. These findings suggest the mouse to be an acceptable experimental model for body composition and exercise studies.

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