scholarly journals Survival, Growth, Feed Efficiency and Carcass Composition of Rabbitfish, Siganus Rivulatus, Fed Different Dietary Energy and Feeding Levels

2010 ◽  
Vol 3 (1) ◽  
pp. 18-27 ◽  
Author(s):  
Ashraf El-Dakar ◽  
Gaber Hassanen ◽  
Shymaa Shalaby ◽  
Samir Ghoniem ◽  
Osama Zenhom
Keyword(s):  
Feed Efficiency ◽  
Carcass Composition ◽  
Dietary Energy ◽  
Siganus Rivulatus

1476 Endocannabinoid concentrations in plasma associated with feed efficiency and carcass composition on crossbreed steers

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 716-717
Author(s):  
V. M. Artegoitia ◽  
A. P. Foote ◽  
R. M. Lewis ◽  
D. A. King ◽  
S. D. Shackelford ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Carcass Composition

Endocannabinoid concentrations in plasma during the finishing period are associated with feed efficiency and carcass composition of beef cattle

2017 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
V. M. Artegoitia ◽  
A. P. Foote ◽  
R. G. Tait ◽  
L. A. Kuehn ◽  
R. M. Lewis ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Feed Efficiency ◽  
Carcass Composition

PATTERNS OF MUSCLE, BONE, AND FAT ACCRETION IN THREE BIOLOGICAL TYPES OF FEEDLOT BULLS FED THREE DIETARY ENERGY LEVELS

1985 ◽  
Vol 65 (2) ◽  
pp. 351-361 ◽  
Author(s):  
D. L. PATTERSON ◽  
M. A. PRICE ◽  
R. T. BERG
Keyword(s):  
Key Words ◽  
Energy Levels ◽  
Subcutaneous Fat ◽  
Body Cavity ◽  
Tissue Growth ◽  
Carcass Composition ◽  
Dietary Energy ◽  
Actual Weight ◽  
Age Range ◽  
Tissue Accretion

The effect of three types of diet on the carcass composition of 71 feedlot bulls of three biological types (Dairy Cross (DX), Hereford Cross (HX), and Beef Cross (BX)) was studied over a 2-yr period. Diets consisted of pelleted alfalfa with 0, 35 or 85% grain. Serial slaughter and carcass dissection into eight wholesale cuts and component tissues were carried out over an age range of 392–636 days. Interactions of biological type with diet-year were generally not significant for actual weight of muscle, bone and fat, or for weight of these tissues at a constant side subcutaneous fat weight of 16 kg. There were few significant effects of biological type or diet-year on the ratio of actual weight of subcutaneous to intermusclar plus body cavity fat. HX bulls had significantly less muscle and less bone than BX or DX, based on actual weights, but the rate of tissue accretion relative to side subcutaneous fat was the same for the three biological types. Animals on the lowest level of dietary energy had less weight of fat than did those on an 85% grain diet, but diet-year growth coefficients of tissue weights relative to side subcutaneous fat weight were generally homogeneous. It was concluded that effects of dietary energy were consistent over the biological types studied and for most of the wholesale cuts. Key words: Feedlot bulls, diet, biological types, tissue growth

Growth of carcass joints and tissues in steers of three breed types fed two dietary energy levels

1990 ◽  
Vol 1990 ◽  
pp. 13-13
Author(s):  
M. G. Keane ◽  
G. J. More O’ Ferrall ◽  
J. Connolly
Keyword(s):  
Beef Cattle ◽  
Energy Levels ◽  
Carcass Composition ◽  
Dietary Energy ◽  
Beef Production ◽  
Beef Breed ◽  
Slaughter Weight ◽  
Breed Type ◽  
Early Maturing ◽  
Metabolisable Energy

Factors which affect the carcass composition of beef cattle include breed type, plane of nutrition and slaughter weight. With increasing weight, the relative proportions of the carcass joints and tissues change and if these changes were known or could be predicted then cattle could be slaughtered at the desired carcass composition. Dairy bred calves for beef production can be classified into three breed categories -straightbred Friesians, early maturing beef breed x Friesians and late maturing beef breed x Friesians. The objectives of the present study were to compare the changes in carcass composition associated with changes in slaughter weight in Friesian (FF), Hereford x Friesian (HF) and Charolais x Friesian (CF) steers and to determine the effects of dietary metabolisable energy (ME) content.

scholarly journals Performance and carcass quality of Czech Fleckvieh, Charolais and Charolais × Czech Fleckvieh bulls fed diets based on different types of silages

2008 ◽  
Vol 52 (No. 9) ◽  
pp. 269-276 ◽  
Author(s):  
L. Bartoň ◽  
V. Kudrna ◽  
D. Bureš ◽  
R. Zahrádková ◽  
V. Teslík
Keyword(s):  
Feed Efficiency ◽  
Dry Matter ◽  
Live Weight ◽  
Experimental Period ◽  
Average Weight ◽  
Dietary Energy ◽  
Maize Silage ◽  
Different Types ◽  
Entire Experiment

A total of thirty-four Czech Fleckvieh (CF), Charolais (CH) and Charolais × Czech Fleckvieh (CH × CF) bulls with an average weight of 284 kg were included in the experiment and fed ad libitum two mixed diets: MS (based on maize silage) and LCS (based on legume-cereal and lucerne silages) with different concentrations of dietary energy until slaughter at the target live weight of 600 kg. The CF bulls consumed more dry matter (DM) of feed daily than the CH bulls (<i>P</i> < 0.05) and gained weight less efficiently than the CH × CF and CH animals (<i>P</i> < 0.01) during the entire experiment. The killing-out percentage was lower in the CF than in the CH × CF and CH (<i>P</i> < 0.05). The CH bulls received a higher score for carcass conformation and a lower score for carcass fatness (<i>P</i> < 0.01) than the CF bulls, had lower proportions of kidney and cod fat (<i>P</i> < 0.01) than the CH × CF and CF bulls, and produced the highest percentage of high-priced meat (<i>P</i> < 0.05) and the lowest percentage of separable fat (<i>P</i> < 0.001). The bulls on the MS diet were younger than the others at the end of the experiment (<i>P</i> < 0.01), gained weight more rapidly (<i>P</i> < 0.001), consumed less DM (<i>P</i> < 0.001) daily, utilized nutrients more efficiently over the entire experimental period (<i>P</i> < 0.001), and had a higher proportion of internal fat than the LCS bulls. It can be concluded that purebred CH bulls were superior to the other breed groups in most of the traits observed. The intensive diet based on maize silage increased average daily gains, reduced the time needed to achieve the target slaughter weight, and improved the feed efficiency of bulls.

scholarly journals Influence of dietary roughage level and Megasphaera elsdenii on feedlot performance and carcass composition of thin cull beef cows fed for a lean market

2019 ◽  
Vol 4 (1) ◽  
pp. 159-169
Author(s):  
Jonathan C DeClerck ◽  
Nathan R Reeves ◽  
Mark F Miller ◽  
Bradley J Johnson ◽  
Gary A Ducharme ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Body Condition Score ◽  
Average Daily Gain ◽  
Beef Cows ◽  
Carcass Composition ◽  
Finishing Diets ◽  
Caloric Density ◽  
Significant Difference ◽  
Megasphaera Elsdenii ◽  
Compensatory Gain

Abstract One hundred forty-four cull cows (body condition score = 2.10 ± 0.61; BW = 456 ± 47 kg) were organized into a 2 × 2 factorial design (48 pens, 12 pens/treatment, and 3 cows/pen) to evaluate the effect of dietary roughage level and oral drenching of Megasphaera elsdenii NCIMB 41125 (M. elsdenii culture; Lactipro Advance; MS Biotec Inc., Wamego, KS) on performance and carcass characteristics. Cattle were finished over a 42-day realimentation period, and aggressively stepped up over a 10-day period to either a high roughage finisher (HRF; 25% roughage) or a low roughage finisher (LRF; 10% roughage). Within diet, cattle were administered no probiotic or 100 mL of M. elsdenii culture (M. elsdenii NCIMB 41125, 2 108 cfu/mL) on day 0. No diet × probiotic interactions were detected (P ≥ 0.15), suggesting that the magnitude of the response was not influenced by the concentrate level of the diet. The main effect of diet triggered several significant responses. Decreasing roughage level tended to improve average daily gain (ADG) by 9.7% (0.26 kg, P = 0.08), while decreasing dry matter intake (DMI) by 0.9 kg (P = 0.09), provoking a 19.7% enhancement of feed efficiency (0.036 units, P &lt; 0.01). However, interim data revealed declines of performance parameters among both diets with a significant difference between treatments only documented during the final phase of the realimentation period. During the final 14 days, LRF posted a 0.68 kg increase in ADG (P = 0.05) and a 2.0 kg decrease in DMI (P = 0.01), translating to improved feed efficiency (0.054 units, P = 0.03). This suggests that increasing the caloric density of finishing diets may help offset the regression of performance typically observed following a compensatory gain. No carcass traits were impacted by either diet or M. elsdenii culture (P ≥ 0.08). Overall, oral drenching of M. elsdenii culture tended to augment ADG (0.26 kg, P = 0.08) and carcass ADG (0.20 kg, P = 0.10). Implying that M. elsdenii culture was effective at alleviating the acidosis risk prompted by the rapid step-up period employed in the trial and may help capitalize on the narrow timeline of compensatory gain in cull cow realimentation.

RESPONSE OF GROWING-FINISHING PIGS TO DIETARY INCLUSION OF GREEN FOXTAIL (Setaria viridis) SEEDS

1984 ◽  
Vol 64 (4) ◽  
pp. 1063-1066
Author(s):  
A. G. CASTELL
Keyword(s):  
Growth Rate ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Growing Pigs ◽  
Carcass Composition ◽  
Apparent Digestibility ◽  
Finishing Pigs ◽  
Setaria Viridis ◽  
Green Foxtail ◽  
Ad Libitum

Increasing the level of wheat screenings (95% green foxtail seeds) from 0 to 25% in diets fed ad libitum over the period from 34 to 89 kg liveweight resulted in an increased daily feed intake (P < 0.05), reduced (P < 0.05) feed efficiency and apparent digestibility, but produced no consistent effects on growth rate or carcass composition. Key words: Growing pigs, green foxtail, Setaria viridis, carcass, digestibility

The responses of growing pigs, of different sex and genotype, to dietary energy and protein

1995 ◽  
Vol 60 (2) ◽  
pp. 291-298 ◽  
Author(s):  
M. F. Fuller ◽  
M. F. Franklin ◽  
R. McWilliam ◽  
K. Pennie
Keyword(s):  
Growing Pigs ◽  
Carcass Composition ◽  
Growth Potential ◽  
The Other ◽  
Daily Weight Gain ◽  
Dietary Energy ◽  
Intact Male ◽  
Body Protein ◽  
Low Protein ◽  
Lean Growth

AbstractIntact male pigs from two nucleus breeding herds (one predominantly Duroc, DM; the other purebred Large Wliite, LM) together with intact male (RM), castrated male (RC) and female (RF) commercial hybrid pigs were given one of two diets, with the same balanced protein (180 or 240 g/kg) at three daily rates, the highest being ‘to appetite‘. Six replicates of 30 pigs were allocated to these regimes at 40 kg: one replicate was slaughtered immediately to determine initial carcass composition; the remaining pigs were slaughtered at 85 kg when carcass fat and specific gravity (SG) were measured. For two replicates this was followed by dissection and chemical analysis: daily gains of carcass lipid and protein were estimated directly for these two replicates and predicted from carcass weight and SG for the other three. Fed ‘to appetite’, castrated males and females ate more than males; LM pigs ate least. All males grew faster than females or castrated males, the DM pigs the fastest, these rankings being relatively insensitive to feeding level. However, both in daily weight gain and daily protein accretion only the males responded to additional dietary protein. Daily body protein accretion of DM pigs increased linearly with intake on both diets whereas LM pigs showed little response to the highest level of feeding. At the same daily protein intake all pigs had higher rates of body protein accretion on the low protein diet, showing that they were sensitive to additional dietary energy. Results indicate that an animal's superiority may result from a greater efficiency of protein utilization or a higher lean growth potential but that these two characteristics are not simply related.

Effect of dietary energy content at different stages of growth on performance of intact male cattle

1976 ◽  
Vol 22 (2) ◽  
pp. 199-206 ◽  
Author(s):  
D. Levy ◽  
Z. Holzer ◽  
D. Ilan
Keyword(s):  
Energy Content ◽  
Live Weight ◽  
Carcass Composition ◽  
Dietary Energy ◽  
Constant Ratio ◽  
Improve Performance ◽  
Intact Male ◽  
Stages Of Growth ◽  
Improved Performance ◽  
Second Period

SUMMARYSix groups of Israeli-Friesian intact male calves were studied over growth periods of 200 to 300 kg, 300 to 400 kg, and 400 to 500 kg live weight. Different ratios (85: 15, 70: 30 and 50: 50) of concentrate to roughage were compared. Two groups received the same ratio (85: 15 or 70: 30) throughout the experiment. In the other groups, the proportion of concentrates was progressively increased or decreased.Live-weight gain in the first period ranged from 759 to 1013 g/day, i n the second period from 1095 to 1239 g/day and in the third period from 831 to 922 g/day. Overall rate of gain was highest in the groups receiving a constant ratio, regardless of the ratio used. Increasing the proportion of concentrates as the calves became heavier, which is common practice in Europe, did not improve performance and decreasing the proportion reduced performance. Only at 200 to 300 and at 400 to 500 kg live weight did a concentrate percentage higher than 50 result in improved performance.Dry-matter intake, relative to live weight, was higher with a ratio of 70: 30 than with one of 85: 15 or of 50: 50 in each period. Animals on a constant ratio of concentrates to roughage gave the most efficient conversion of feed energy to live weight.There were no significant differences in dressing percentage or in carcass composition.

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