scholarly journals Characterization of feeding behavior traits in steers with divergent residual feed intake consuming a high-concentrate diet

2020 ◽  
Vol 98 (7) ◽  
Author(s):  
Ira L Parsons ◽  
Jocelyn R Johnson ◽  
William C Kayser ◽  
Luis O Tedeschi ◽  
Gordon E Carstens
Keyword(s):  
Feeding Behavior ◽  
Feed Intake ◽  
Mean Squared Error ◽  
Average Daily Gain ◽  
Residual Feed Intake ◽  
Behavior Patterns ◽  
Squared Error ◽  
The Mean ◽  
Daily Gain

Abstract The objective of this study was to examine the differences in feeding behavior patterns of steers with divergent phenotypes for residual feed intake (RFI). Three trials were conducted with 508 Angus-based composite crossbred steers (body weight [BW] = 309 ± 57 kg) fed a high-concentrate diet in pens equipped with electronic feed bunks (GrowSafe System). Initial and final carcass ultrasound measurements (intra-muscular fat, backfat depth, and rib-eye area) were collected on days 0 and 70, and BW measured at 14-d intervals. Individual dry matter intake (DMI) and feeding behavior traits were collected for 70 d, and RFI calculated as the residual from the regression of DMI on average daily gain (ADG) and mid-test BW0.75. Steers were ranked by RFI and assigned to low-, medium-, and high-RFI classes based on ± 0.5 SD from the mean RFI within the trial. The feeding behavior traits evaluated in this study included frequency and duration of bunk visit (BV) and meal events, head-down (HD) duration, mean meal length, time-to-bunk interval, the maximum nonfeeding interval, and the day-to-day variation of these traits, defined as the root mean squared error (RMSE) from linear regression of each trait on the day of trial. Additionally, three ratio traits were evaluated: BV events per meal, HD duration per BV event, and HD duration per meal event. Low-RFI (feed-efficient) steers consumed 16% less (P < 0.01) DMI, while BW and ADG were not different compared with high-RFI steers. Low-RFI steers had 18% fewer and 21% shorter (P < 0.01) BV events, and 11% fewer and 13% shorter (P < 0.01) meal events per day compared with high-RFI steers. Furthermore, low-RFI steers exhibited less (P < 0.05) day-to-day variance in DMI, as well as in frequency and duration of BV and meal events and HD duration compared with high-RFI steers. Differences in feeding behavior traits due to RFI were minimally affected by covariate adjustment for DMI, indicating that steers with divergent RFI have distinct feeding behavior patterns that are largely independent of differences in DMI. These results suggest that feeding behavior traits may be useful biomarkers for the prediction of feed efficiency in beef cattle.

scholarly journals Performance, carcass traits, and non-carcass components of feedlot finished lambs from different residual feed intake classes

2018 ◽  
Vol 39 (6) ◽  
pp. 2645 ◽  
Author(s):  
Raizza Fátima Abadia Tulux Rocha ◽  
Andréa Roberto Duarte Lopes Souza ◽  
Maria Da Graça Morais ◽  
Mayara Mitiko Yoshihara Carneiro ◽  
Henrique Jorge Fernandes ◽  
...  
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Residual Feed Intake ◽  
Dry Matter Intake ◽  
Mineral Mixture ◽  
The Mean ◽  
Daily Gain

This study aimed to assess the performance, carcass traits, and non-carcass components of feedlot finished Texel crossbred lambs from different residual feed intake classes (RFI). Forty-seven uncastrated male Texel crossbred lambs (¾ Texel + ¼ Pantaneira) tested here were 4-month-old with an initial weight of 29.9 ± 5.5 kg. The lambs were confined for 70 days for individual dry matter intake (DMI) and average daily gain (ADG) assessment. The diet containing corn silage was provided as roughage, while the concentrate consisted of corn grain, soybean meal, urea, and mineral mixture with a 40:60 roughage to concentrate ratio and 76.34% total digestible nutrients (TDN). After confinement for 70 days, the lambs were slaughtered to assess carcass traits and non-carcass components. Based on the RFI, lambs were divided into three classes according to the standard deviation (sd): Positive RFI (inefficient, 0.5 above the mean), Negative RFI (efficient, 0.5 below the mean), and Medium RFI (intermediate). Classes with Negative (efficient) and Positive RFI (inefficient) showed no differences in ADG (0.321 vs 0.306 kg; P > 0.05). Dry matter intake (g d-1), and percentage of body weight (BW) differed significantly between the RFI classes (P < 0.05). Compared to lambs in the inefficient class, those in the efficient class (Negative RFI) showed a 9% reduction in DMI and had the same ADG. The lambs in either Positive or Negative RFI classes showed no weight differences between non-carcass components (P > 0.05). The RFI classes showed no differences in shrunk body weight, hot carcass weight, hot dressing, and weight of commercial cuts (P > 0.05). They showed no differences in neck, shoulder + shank, loin, rack, flank steak, rack cap off, and leg weights (P > 0.05). Our results indicate that improvement in feed efficiency, as a function of the RFI index, does not compromise performance and carcass traits of Texel crossbred lambs.

scholarly journals Residual feed intake and relationships with performance of Nellore cattle selected for post weaning weight

2011 ◽  
Vol 40 (4) ◽  
pp. 929-937 ◽  
Author(s):  
T. Lucila Sobrinho ◽  
R.H. Branco ◽  
S.F.M. Bonilha ◽  
A.M. Castilhos ◽  
L.A. Figueiredo ◽  
...  
Keyword(s):  
Body Weight ◽  
Standard Deviation ◽  
Feed Intake ◽  
Average Daily Gain ◽  
Residual Feed Intake ◽  
Feed Conversion ◽  
Relative Growth ◽  
Kleiber Ratio ◽  
Nellore Cattle ◽  
Daily Gain

The objective of this work was to evaluate performance, efficiency parameters and phenotypic correlations among measurements of energy efficiency of Nellore cattle selected for post weaning weight and classified according to residual feed intake, calculated by the difference between observed and predicted intake, based on average metabolic body weight and average daily gain. Thus, animals were classified within three groups: high (> mean + 0.5 standard deviation, less efficient); medium (±0.5 standard deviation of the mean); and low (< mean - 0.5 standard deviation, more efficient) residual feed intake. No differences were observed at initial and final body weights, average daily gain and dry matter intake among groups. Animals with low residual feed intake also had greater feed efficiency, feed conversion and partial efficiency of growth and did not differ from the other animals regarding to relative growth rate and Kleiber ratio. Residual feed intake was significantly correlated to feed efficiency (-0.25), feed conversion (0.25), partial efficiency of growth (-0.37) and dry matter intake (0.16) but it did not present significant correlation with body weight (0.04), average daily gain (-0.02), relative growth rate (-0.03) and Kleiber ratio (-0.05). Significant correlations were found between feed conversion and initial body weight (0.34) and average daily gain (-0.46). Partial efficiency of growth presented significant correlation with all other efficiency parameters analyzed. Residual feed intake has high potential in productive efficiency, when compared to the other energy efficiency measurements, being independent of growth and size of the animals.

PSVII-21 Canadian Vytelle technology for determining residual feed intake epdsin raising Qazaq Aqbas bull calves

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 447-448
Author(s):  
Dauren Matakbayev ◽  
Assel Tilepova ◽  
Anuarbek T Bissembayev
Keyword(s):  
Feed Intake ◽  
Average Daily Gain ◽  
Residual Feed Intake ◽  
Cost Effective ◽  
Effective Work ◽  
Bull Calves ◽  
Selection For ◽  
Group 2 ◽  
Daily Gain ◽  
Group 1

Abstract The Abstract reviews the experience of implementing Vytelle technology in ZhanaBereke LLP, Akmola region in Kazakhstan. The trial objects are Qazaq Aqbas bull calves: group 1 aged 10–11 months (n = 22), group 2 aged 11–12 months (n = 24). Data analysis showed that more reliable Residual Feed Intake calculated for each individual animal on the basis of their phenotypes and information on pedigree, were found in group 1. The average RFI EPD for group 1 is -0.0607, for group 2 is -0.0297. The RFI% Rank in terms of RFI EPD for both trial groups varied within 4 ... 96%. However, the average RFI% Rank was lower in the first group (45%) compared to the second group (56%). From which it follows that the RFI EPD is higher in group 1. Average Daily Gain EPDs (ADG EPD) higher in group 1 -0.0018. A higher ADG EPDs indicate a more cost-effective metric. The ADG% Rank in terms of ADG EPD for group 1 varied within 1 ... 62%, for group 2: 1 ... 63%. The average ADG% Rank was slightly lower in the first group (30%) compared to the second group (33%). From the presented data, it follows that the breeding valueaccording to the ADG EPD is higher in group 1. The average Dry Matter Intake by animals per day during the trial (DMI EPD) is equal to -0,0600 in the first group, and -0,0292 in the second group. The DMI% RANK in terms of DMI EPD for group 1 varied within 31 ... 93%, for group 2: 38 ... 96%. The DMI% RANK was lower in the first group (60%) compared to the second group (67%). Summarizing the above, we can conclude that selection for this characteristic is less effective, work will continue to increase this indicator.

Age, weight or total feed intake as bases for the performance testing of growing pigs

1978 ◽  
Vol 27 (3) ◽  
pp. 345-354 ◽  
Author(s):  
G. A. Lodge ◽  
D. Lister ◽  
J. D. Wood ◽  
M. S. Wolynetz
Keyword(s):  
Feed Intake ◽  
Average Daily Gain ◽  
Performance Testing ◽  
Growing Pigs ◽  
Feed Conversion ◽  
Large White ◽  
Breed Difference ◽  
The Mean ◽  
Daily Gain

ABSTRACTIn an experiment which showed that the results of a genotype comparison are influenced by the design of the test, 16 castrated male and 16 female pigs of each of Large White (LW) and Gloucester Old Spot (GOS) breeds were allocated equally among four treat- ments: WW—rationed by weight and slaughtered by weight; A A—rationed by age and slaughtered by age; AW—rationed by age and slaughtered by weight; and WF—rationed by weight and slaughtered after a common total feed intake. The experiment was designed so that performance of LW would be similar on all treatments, and the degree to which the GOS differed from the LW on each of these treatments was then evaluated. All pigs started on the experiment at 12 weeks of age, at which time mean weight of the LW was 14% greater than the mean for the GOS. The only between- breed difference that was statistically significant (P<0·05) on all treatments was weight of lean. Average daily gain and efficiency of feed conversion were significantly different between breeds only on the WW treatment. Weight of fat was significantly different on WW and AW but not on AA or WF.

scholarly journals Effect of inbreeding on lean meat percentage and average daily gain in Hungarian Landrace pigs

2008 ◽  
Vol 51 (6) ◽  
pp. 541-548
Author(s):  
Z. Vígh ◽  
P. Gyovai ◽  
L. Csató ◽  
Á. Bokor ◽  
J. Farkas ◽  
...  
Keyword(s):  
Inbreeding Depression ◽  
Model Comparison ◽  
Mean Squared Error ◽  
Average Daily Gain ◽  
Lean Meat ◽  
Inbreeding Coefficients ◽  
Squared Error ◽  
Near Future ◽  
Best Fit ◽  
Daily Gain

Abstract. Pedigree and field test data – collected between 1994–2005 – were analyzed in a group of 132,548 Hungarian Landrace pigs. The analysed traits were average daily gain (ADG) and lean meat percentage (LMP). In the present study inbreeding coefficients, pedigree completeness (complete generation equivalents) and inbreeding depression for ADG and LMP were estimated. Increasing the number of generations that were considered in the pedigree the estimated inbreeding coefficients did not change after the 5th generation, but pedigree completeness was continuously increased. The estimated inbreeding depression for ADG and LMP were different applying 40 different models but the magnitude of the differences was small. The model comparison showed that the models containing litter and year-month effects had the best fit (smallest mean squared error). Increasing the inbreeding coefficient by 10 % decreased ADG by 4.01 g and practically did not affect LMP (0.003 %). It can be concluded that the estimated inbreeding depression was small and substantial depression can not be expected in the near future. However, the low level of inbreeding of the studied population can partly be explained by the short pedigrees. This suggests that Hungarian pig breeders may often import breeding animals or carry out herd replacements rather than applying continuous within group selection.

Relationships of feeding behaviors with average daily gain, dry matter intake, and residual feed intake in Red Angus–sired cattle1

2014 ◽  
Vol 92 (11) ◽  
pp. 5214-5221 ◽  
Author(s):  
M. McGee ◽  
C. M. Welch ◽  
J. A. Ramirez ◽  
G. E. Carstens ◽  
W. J. Price ◽  
...  
Keyword(s):  
Feed Intake ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Residual Feed Intake ◽  
Dry Matter Intake ◽  
Feeding Behaviors ◽  
Red Angus ◽  
Daily Gain

scholarly journals Effects of Concurrent Selection for Residual Feed Intake and Average Daily Gain on Fertility and Longevity in Black Angus Beef Females

2017 ◽  
Author(s):  
Patrick J. Gunn ◽  
Garland R. Dahlke ◽  
Jim Werner ◽  
Joe Werner ◽  
Clint Werner ◽  
...  
Keyword(s):  
Feed Intake ◽  
Average Daily Gain ◽  
Residual Feed Intake ◽  
Selection For ◽  
Daily Gain
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