The intensive rearing of lambs 1. Some factors affecting performance in the liquid feeding period

1967 ◽  
Vol 9 (4) ◽  
pp. 501-508 ◽  
Author(s):  
D. A. R. Davies ◽  
J. B. Owen
Keyword(s):  
Weight Gain ◽  
Food Intake ◽  
Live Weight ◽  
Solid Food ◽  
Factors Affecting ◽  
Live Weight Gain ◽  
Liquid Feeding ◽  
Ad Libitum ◽  
Factors Affecting Performance ◽  
Milk Feeding

1. Investigations into possible ways of rearing artificially the lambs surplus to the ewe's capacity are described and the results discussed.2. A ewe-milk replacer with a high fat content was used from 2 days of age until weaning at 11.4 kg live weight. Two levels of milk feeding, restricted and ad libitum, were given in the second year. Significant differences were observed in live weight gain per day, milk consumption per kg live weight gain and solid food intake prior to weaning. Live weight gain and solid food intake in the period immediately after weaning also differed markedly. Sex and birth weight had little effect on performance.3. Food costs were lower on the restricted level of milk feeding than on the ad libitum level.

A note on the growth and food consumption of crossbred lambs of five sire breeds

1983 ◽  
Vol 37 (1) ◽  
pp. 137-140 ◽  
Author(s):  
J. A. Woolliams ◽  
G. Wiener
Keyword(s):  
Growth Rate ◽  
Energy Efficiency ◽  
Weight Gain ◽  
Food Intake ◽  
Food Consumption ◽  
Fish Meal ◽  
Live Weight ◽  
Food Conversion ◽  
Live Weight Gain ◽  
Ad Libitum

ABSTRACTLambs, 8 weeks of age, the offspring of sires of the Scottish Blackface, East Friesland, Finnish Landrace, Suffolk and Texel breeds mated to Scottish Blackface females as a common maternal breed were fed ad libitum on a concentrate containing barley and fish meal for 14 weeks. Live weight and food intake were measured at intervals of 2 weeks.Live-weight gain varied between sire breeds, Suffolk crosses having the greatest growth rate and the Blackface lambs the least, but there were no significant differences in their food conversion ratios. Food intakes were compared with those predicted by two methods. When the only criteria for prediction were live weight and the metabolizability of the diet the prediction was poor, whereas very accurate agreement was found when the criteria for prediction included consideration of the changes in energy efficiency with food intake and with maturity.

The effect of increasing slaughter weight on the production performance and meat quality of finishing pigs

1998 ◽  
Vol 67 (3) ◽  
pp. 591-600 ◽  
Author(s):  
R. N. Weatherup ◽  
V. E. Beattie ◽  
B. W. Moss ◽  
D. J. Kilpatrick ◽  
N. Walker
Keyword(s):  
Weight Gain ◽  
Food Intake ◽  
Meat Quality ◽  
Live Weight ◽  
Production Performance ◽  
Daily Food Intake ◽  
Live Weight Gain ◽  
Slaughter Weight ◽  
Daily Food ◽  
Ad Libitum

AbstractA study was made in two parts to establish the production performance potential of pigs taken to heavy slaughter weights (a) in individual housing and (b) in group housing. In experiment 1 96 crossbred pigs, comprised of equal numbers of boars, castrated males and gilts, were housed individually from 50 kg live weight and offered food ad libitum until one of four target slaughter weights was reached (70, 80, 90 or 100 kg carcass weight). Detailed dissection and meat quality assessments were performed on sample joints taken from these pigs. There were significant interactions in that boars maintained a high level offood conversion efficiency while this deteriorated at heavier weights for castrated males and gilts. Protein deposition rates (PDR) were estimated to be close to, or in excess of, 200 glday for boars. Daily live-weight gains were similar at all four slaughter weights despite increases (P < 0·001) in daily food intake at the heavier weights. Sample joint contents of lean (P < 0·05) and bone (P = 0·001) decreased while subcutaneous fat content increased (P < 0·001) with increasing slaughter weight. Cooking loss was reduced (P < 0·001) at the heavier weights while other meat quality parameters were not significantly affected by slaughter weight or gender. In experiment 2 288 group-housed boars and gilts were slaughtered at the same four target carcass weights as in experiment 1. Daily food intake, daily live-weight gain and variability in performance were lower for group-housed animals. It is concluded that maximum lean growth lies beyond ad libitum food intake for group-housed pigs of the genotype used in the present study. There are opportunities to take pigs to high slaughter weights with no reduction in daily live-weight gain and concomitant improvements in some aspects of meat quality.

scholarly journals Some Environmental Factors Affecting Birth Weight, Weaning Weight and Daily Live Weight Gain of Holstein Calves

2015 ◽  
Vol 3 (7) ◽  
pp. 617 ◽  
Author(s):  
Erdal Yaylak ◽  
Hikmet Orhan ◽  
Alim Daşkaya
Keyword(s):  
Weight Gain ◽  
Birth Weight ◽  
Environmental Factors ◽  
Live Weight ◽  
Weaning Weight ◽  
Factors Affecting ◽  
Live Weight Gain ◽  
Weaning Age ◽  
Humidity Index ◽  
Holstein Calves

The present study was conducted to determine some environmental factors affecting birth weight, weaning weight and daily live weight gain of Holstein calves of a livestock facility in Izmir, Turkey. The data on 2091 calves born between the years 2005-2010 were used to assess the relevant parameters. Effects of calving year, calving month, calf gender and the interaction between calving year and calving month on calves’ birth weights were highly significant. The overall mean of birth weights was 39.6±0.15 kg. In addition, effects of calving year, calving month, gender, birth weight, weaning age, calving year x calving month, calving year x gender and calving year x calving month x gender interactions on weaning weight (WW) and daily live weight gain (DLWG) were highly significant. The overall means of WW and DLWG were respectively found to be 79.7±0.20 kg and 525±2.5 g. A one kilogram increase in birth weight resulted in an increase of 0.89 kg in weaning weight and a decrease of 1.26 g in daily live weight gain. Prenatal temperature-humidity index (THI) affected birth weight of calves (R2=0.67). Increasing THI from 50 to 80 resulted in 3.8 kg decrease in birth weight.

The utilization by beef cattle of a cereal supplement given in liquid suspension or in the dry form

1973 ◽  
Vol 16 (2) ◽  
pp. 173-177 ◽  
Author(s):  
A. R. Renton ◽  
T. J. Forbes
Keyword(s):  
Adverse Effect ◽  
Weight Gain ◽  
Food Intake ◽  
Beef Cattle ◽  
Live Weight ◽  
Food Conversion ◽  
Live Weight Gain ◽  
Liquid Suspension

SUMMARYAn experiment was carried out in which a cereal supplement was given to beef cattle, either in suspension in water or as a dry supplement. There were no significant differences between treatments in live-weight gain, food intake or food conversion ratios. Although there was a tendency for the digestibility coefficients of all constituents to be lower on the diet containing the liquid supplement, the differences were not statistically significant. It is concluded that giving a supplement in suspension has no adverse effect on the utilization of the overall diet and could facilitate mechanization of the feeding operation.

A comparison of the nursing and suckling behaviour of group- and individually-housed sows and their litters

1983 ◽  
Vol 36 (3) ◽  
pp. 445-451 ◽  
Author(s):  
M. J. Bryant ◽  
P. Rowlinson ◽  
H. A. M. Van der Steen
Keyword(s):  
Weight Gain ◽  
Post Partum ◽  
Live Weight ◽  
The Other ◽  
Live Weight Gain ◽  
Ad Libitum

ABSTRACTNursing frequency, suckling duration and teat order were recorded in 12 ‘hybrid’ sows and their litters from parturition to weaning at day 42 post partum. Sows and their litters were moved from the farrowing quarters at day 20; half were housed as a group (G) and fed ad libitum with a boar present and the other half were housed individually (S) with no boar present and ration-fed to scale.Some differences occurred in behaviour from day 20. A significantly greater number of false nursing periods, significant synchronization of nursing periods, and a tendency for more long and short nursing intervals occurred in G than S sows and litters. The duration of the preliminary nosing phase and the total nursing period were significantly longer in S than G litters. Teat order scores, indicating consistency of piglet suckling position on the sow, tended to be greater in S than G litters, and there was a fall in the score for G litters in the weeks following grouping. This was associated with a check in live-weight gain.All G sows showed oestrus during lactation, on average 15 days after grouping. There was no incidence of lactational oestrus in the S sows which showed oestrus 5 days after weaning.

Tests of two theories of food intake using growing pigs 1. The effect of ambient temperature on the intake of foods of differing bulk content

2001 ◽  
Vol 72 (2) ◽  
pp. 351-360 ◽  
Author(s):  
E. C. Whittemore ◽  
I. Kyriazakis ◽  
G.C. Emmans ◽  
B.J. Tolkamp
Keyword(s):  
Weight Gain ◽  
Food Intake ◽  
Live Weight ◽  
Growing Pigs ◽  
Effect Of Temperature ◽  
Biological Efficiency ◽  
Net Energy ◽  
Live Weight Gain ◽  
Fresh Food ◽  
High Bulk

AbstractAn experiment was carried out on pigs to provide a test of two current conceptual frameworks available for the understanding and prediction of food intake. Framework 1 assumes that food intake will be that which allows potential (genetic) performance to be achieved. If this is not achieved then it is because intake is being constrained. Framework 2 sees food intake as being a consequence of a process of optimization such that biological efficiency (the ratio of net energy ingested to oxygen consumed) is maximized. Both frameworks predict that a reduction in temperature will increase the intake of a high quality food. For a food of low quality framework 2 predicts that intake will also be increased when temperature is decreased while framework 1 predicts that it will not. This difference between the predictions of the two frameworks allows them to be tested by means of an experiment in which foods of different quality were given to animals at different environmental temperatures.Forty pigs were randomly allocated to a control (C) food based on micronized wheat with 13·1 MJ digestible energy (DE) and 232 g crude protein (CP) per kg fresh food, or one of two high bulk foods. The high bulk foods contained either 650 g/kg of unmolassed sugar-beet pulp (SBP) or 650 g/kg of wheat bran (WB). Half the pigs were maintained at a thermoneutral temperature of 22ºC for 14 days followed by a cold temperature of 12ºC for 14 days. The other half were maintained at 12ºC for a period of 14 days followed by a temperature of 22ºC for 14 days. Food intake was recorded daily and live weight twice weekly.There was a highly significant food ✕ temperature interaction ( P < 0·001) for food intake. A reduction in temperature resulted in an increase in food intake on C and WB but had no effect on the intake of SBP. There was a highly significant effect of both temperature and food on intake ( P < 0·001). A reduction in temperature resulted in a significant increase in food intake, intake on WB was higher than that of either C or SBP. There was no overall effect of temperature on live-weight gain although a reduction in temperature resulted in a non-significant increase in the gain of C and reduction in the gain of WB and SBP. There was a highly significant effect of food ( P < 0·001) on live-weight gain, as gain on C was higher than that on either WB or SBP.The results of the experiment were in agreement with the predictions set forward by the first framework that growing pigs are eating to achieve maximum performance subject to constraints.

Effects of supplementing maize and grass silages with barley, and maize silage with urea or ammonia, on the intake and performance of fattening bulls

1980 ◽  
Vol 31 (3) ◽  
pp. 243-250 ◽  
Author(s):  
K. Aston ◽  
J. C. Tayler
Keyword(s):  
Weight Gain ◽  
Dry Matter ◽  
Live Weight ◽  
Metabolizable Energy ◽  
Dry Matter Intake ◽  
Carcass Quality ◽  
Maize Silage ◽  
Live Weight Gain ◽  
Grass Silage ◽  
Ad Libitum

ABSTRACT1. Experiment 1. Six treatment groups of one British Friesian and four South Devon × British Friesian bulls, initially 432 kg mean live weight and aged 491 days, were offered individually maize or grass silage ad libitum plus 0, 5 or 10g barley dry matter per kg live weight daily for 80 days. The silages had similar digestible dry matter and estimated metabolizable energy contents but the grass silage contained more ammonia and acetic, propionic and butyric acids. Mean values for groups receiving respectively maize and grass silage diets were for dry-matter intake 17·7, 20·3, 20·4 and 13·0, 16·6, 18·7 g/kg live weight and for live-weight gain 1·00, 1·32, 1·46 and 0·65, 0·98, 1·22kg/day. Significantly more maize than grass silage dry matter was eaten when the silages were given alone and dry-matter intakes, live-weight and carcass gains were greater for maize silage diets. Dry-matter intake, live-weight and carcass gains, efficiency of feed use and carcass quality significantly improved when barley was given.2. Experiment 2. Six groups of five British Friesian bulls, initially 418 kg mean live weight and aged 474 days, were offered individually maize silage ad libitum with either urea or one of two quantities of aqueous ammonia mixed in at the time of feeding, plus 0 or 5 g barley dry matter per kg live weight daily for 90 days. The urea and ammonia-treated silages contained 125, 124 and 148 g crude protein per kg dry matter respectively, with pH values of 3·8, 3·9 and 4·3, and when given alone or with barley mean daily intakes (g dry matter per kg live weight) were 17·1, 18·6 for urea-treated silage diets, and 17·8, 18·8 and 16·9, 19·1 respectively for ammoniatreated silage diets. Live-weight gains were 0·69, 0·94, 0·63, 1·09, 0·64 and 1·07 kg/day. Ammonia treatment had no effect on intake or live-weight gain. Live-weight and carcass gains and carcass quality improved when barley was given.3. The maize silage offered in Experiment 1 contained similar metabolizable energy but more starch than that in Experiment 2 and was used more efficiently for live-weight gain.

Holo-analysis of the efficacy of Bio-Mos® in pig nutrition

2006 ◽  
Vol 82 (5) ◽  
pp. 683-689 ◽  
Author(s):  
G. D. Rosen
Keyword(s):  
Weight Gain ◽  
Food Intake ◽  
Live Weight ◽  
Negative Control ◽  
Outer Cell ◽  
Test Duration ◽  
Food Conversion ◽  
Protein Food ◽  
Live Weight Gain ◽  
Empirical Modelling

AbstractThis exploratory holo-analysis of the efficacy of Bio-Mos®, (BM), an outer cell wall derivative of a strain of Saccharomyces cerevisiae, is part of an empirical modelling research programme comparing the efficacies of potential replacements for veterinary prescription-free pronutrient antibiotics in pig production. The data resource was mined from 128 saccharide publications of which 31/97 on BM (1997 to 2003) provided 69 negatively controlled start-to-finish tests from 10 countries (USA 71%) using 3778 pigs(30·5 per treatment). Respective food intake, live-weight gain and food conversion responses of 0·0075 kg/day (0·99%), 0·0145 kg/day (3·58%) and −0·0526 (3·07%) have coefficients of variation of 511, 163 and 229% and beneficial gain and conversion frequencies of 73 and 68%, 54% jointly. Holo-analytical multiple regression models of BM food intake, live-weight gain and food conversion effects using conventional and less stringent probabilities contain significant independent variables for negative control performances, dosage, discontinuous dosage, test duration, year of test, non-USA test, male, grower-finisher, slatted floor, processed food, antibacterial foods, animal protein food, main vegetable protein not soya bean, added oil/fat food and factorial data, which account for 11 to 68% of variations in response. The models quantify differences in research and praxis and indicate areas for future modelling research on BM dose-response relations, effects of ration ingredient and nutrient contents, other saccharide efficacy comparisons, including lactose, and BM comparisons and interactions with other proposed antibiotic replacements.

A note on the progressive carcass-weight changes of fattening store lambs

1973 ◽  
Vol 16 (1) ◽  
pp. 95-98 ◽  
Author(s):  
W. Rutter
Keyword(s):  
Weight Gain ◽  
Dry Matter ◽  
Live Weight ◽  
Carcass Weight ◽  
Dry Matter Intake ◽  
Weight Changes ◽  
Live Weight Gain ◽  
Ad Libitum

SUMMARYTwo experiments involving the sequential slaughter of intensively fattened store lambs were each carried out over a period of 12 weeks. In the first experiment the lambs were offered a concentrate diet ad libitum. In the second experiment they were offered swede turnips ad libitum with a limited amount of concentrates.In each experiment, similar groups of lambs were slaughtered at equal intervals in order to measure progressive changes in live weight, carcass weight and dry-matter intake. Carcass-weight gain as a proportion of live-weight gain was found to be 74% in the first experiment and 86% in the second experiment.

The effects of dietary energy content and level of feeding on the growth of Israeli-Friesian intact male cattle

1974 ◽  
Vol 18 (1) ◽  
pp. 67-73 ◽  
Author(s):  
D. Levy ◽  
Z. Holzer ◽  
H. Neumark ◽  
S. Amir
Keyword(s):  
Weight Gain ◽  
Feed Intake ◽  
Energy Content ◽  
Live Weight ◽  
Dietary Energy ◽  
Intact Male ◽  
Live Weight Gain ◽  
Ad Libitum ◽  
Second Period ◽  
Daily Gain

SUMMARYIn an experiment with group-fed cattle from 6 months of age to slaughter at 480 kg live weight two levels of feed intake: 1, ad libitum, 2, 85% of ad libitum amount, were combined with two ratios of concentrate to hay: a, 70: 30; b, 30: 70. In two further treatments, 3a and 3b, the cattle were fed diets a or b at 70% of ad libitum from 6 to 10 months and ad libitum thereafter.Daily gain during the first 124 days of the experiment was (in grams) 1293, 983, 1097, 846, 992 and 756, and from the 125th day to slaughter 735, 600, 796, 579, 830 and 714, for treatments la, lb, 2a, 2b, 3a and 3b, respectively. The decline in rate of gain from the first period to the second was inversely related to the level of feed intake and to the percentage of concentrates in the ration in the first period.Daily carcass gain was 582, 393, 532, 350, 531 and 368 g for treatments la, lb, 2a, 2b, 3a and 3b, respectively.The treatments that were switched over from 70% of ad libitum feed intake in the first period to 100% in the second (3a and 3b), exhibited considerable compensatory growth in the second period, but this was not sufficient to be of economic advantage.The overall ME requirement per kg of live-weight gain was inversely related to rate of gain. Of the six treatments, 2a (85% of ad libitum, 70% concentrate) was the most efficient (19·8 Mcal/kg live-weight gain).Animals on the 100% level of feed intake throughout the experiment (treatments la, lb) were significantly fatter than those on the other treatments.

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