scholarly journals Effect of genotype, sex and litter size on growth and basic traits of carcass quality of light lambs

2011 ◽  
Vol 59 (3) ◽  
pp. 111-116 ◽  
Author(s):  
Jan Kuchtík ◽  
Igor Dobeš ◽  
Zdeňka Hegedűšová
Keyword(s):  
Litter Size ◽  
Carcass Quality ◽  
Free Access ◽  
Daily Feeding ◽  
Organic Mineral ◽  
Kidney Fat ◽  
Ad Libitum ◽  
Dressing Percentage ◽  
Mineral Lick

Evaluation of the effect of genotype (Romanov breed: n = 26, and F1 crossbreds of Suffolk-Romanov: n = 29), sex (males: n = 37 and females: n = 18) and litter size (singles: n = 6, twins: n = 16, triples: n = 21 and quadruplets: n = 12) on growth and basic carcass quality traits of light lambs was carried out at an organic sheep farm in Kuklík over the years 2007 and 2008. Throughout the experiment the lambs were reared with their mothers, indoors. The weaning of lambs was carried out just before slaughter. The daily feeding ration of the lambs consisted of the mother’s milk (ad libitum) and organic mineral lick (ad libitum), whereas the lambs had free access to the feedstuff of their mothers.The daily feeding ration of the ewes consisted of haylage (2.5 kg/ewe), meadow hay (ad libitum) and organic mineral lick (ad libitum). The genotype (G) and the sex (S) had not a significant effect on growth of lambs in the period from birth till the slaughter. On the other hand the litter size (LS) had a highly significant effect on this trait, whilst the highest daily gain in above-mentioned period was found in singles (157 g). Concerning the carcass traits the G had a significant effect only on carcass dressing percentage while the S had a significant effect only on proportion of kidney. Nevertheless the LS had a significant effect on carcass dressing percentage and the proportions of skin, kidney and kidney fat. In conclusion it can be completed that the fatness scores of all individual carcasses were relatively very low which is important for good realisation of the carcasses on the market.

The Effect of Feeding System on the Carcass Quality of Crossbred Lambs with Texel

2020 ◽  
Vol 68 (1) ◽  
pp. 17-24
Author(s):  
Angela Cividini ◽  
Dušan Terčič ◽  
Mojca Simčič
Keyword(s):  
Growth Rate ◽  
Meat Quality ◽  
Carcass Quality ◽  
Quality Traits ◽  
Feeding System ◽  
Ad Libitum ◽  
Daily Gain ◽  
Effect Of Feeding ◽  
Carcass Cuts

The aim of this study was to estimate the effect of feeding system on the growth rate and carcass quality of crossbred Improved Jezersko-Solčava x Texel (JSRT) lambs and to evaluate the effect of sex on these traits. The trial was conducted in nature according to the traditional rearing systems. The trial included 44 crossbred lambs, which were born and reared until the slaughter in three different flocks. In the age of 10 days suckled lambs were offered with ad libitum corresponding diets according to the feeding system. All lambs were slaughtered in seven consecutive days by the same procedure. The effect of feeding system significantly affected daily gain from birth to slaughter, EUROP carcass conformation and shoulder width. Likewise, the effect of sex significantly affected daily gain from birth to slaughter and internal fatness of carcasses. According to carcass cuts the feeding system significantly affected only the proportion of neck and leg. Considering meat quality traits, feeding system had a significant effect on the pH 45 and CIE a* values. In this study, we could speculate that more than the feeding system the growth and the carcass traits as well as meat traits were affected by the amount of the supplement.

The effects of nutrition on reproductive performance, lactation and carcass quality of once bred gilts

1995 ◽  
Vol 1995 ◽  
pp. 178-178
Author(s):  
A H Stewart ◽  
S A Edwards ◽  
V R Fowler
Keyword(s):  
Sugar Beet ◽  
Reproductive Performance ◽  
Feed Efficiency ◽  
Reproductive Physiology ◽  
Sugar Beet Pulp ◽  
Energy Sources ◽  
Carcass Quality ◽  
Beet Pulp ◽  
Ad Libitum

The once bred gilt system of production has a number of benefits in terms of feed efficiency and welfare, however the system relies on the production of a quality carcass and acceptable reproductive performance. Previous studies have indicated that welfare might be improved if gilts were ad-libitum fed a diet containing 60% Sugar beet pulp (Stewart et al 1993). There was a suggestion however that reproductive physiology may be put at risk using such a diet. The objective of this experiment was to identify differences in reproductive performance using two different energy sources in gestation and to manipulate nutrition during lactation to study the effect on carcass quality.

Influence of litter size and breed of sire on carcass weight and quality of lambs

1970 ◽  
Vol 12 (2) ◽  
pp. 281-290 ◽  
Author(s):  
H. P. Donald ◽  
J. L. Read ◽  
W. S. Russell
Keyword(s):  
Litter Size ◽  
Carcass Weight ◽  
Wide Range ◽  
Kidney Fat

SUMMARYIn order to obtain a wide range of live weights, two Oxford Down, two Southdown, and two Soay rams of recent feral origin, were used to sire lambs from 169 crossbred ewes. These ewes had been bred from Blackface ewes mated to Border Leicester, Dorset Hora, Clun Forest, Finnish Landrace and Tasmanian Merino rams. Of the 282 lambs weaned by the crossbred ewes, 61 were singles, 166 twins, 51 triplets and 4 quadruplets. Carcass data were obtained from all but three of them.Oxford Down cross lambs were, in terms of fitted values, 10 kg heavier and 4 days younger than Soay cross lambs and 6 kg heavier and 2 days younger than Southdown cross lambs when slaughtered. Twins and triplets were 1·4 and 2·1 kg, respectively, lighter than singles and were 37 and 58 days older than singles. Ewes of the heaviest groups produced heavier lambs in a shorter time than ewes of the lightest groups.The Soay cross lambs showed a higher killing-out percentage, less tail fat, and more kidney fat, than the Southdown and Oxford Down cross lambs.Carcass characters made little if any difference to the price paid for the lambs which depended mainly on weight. Receipts from lambs were highest when the most fertile ewes were mated to the largest rams.

scholarly journals Simplified dissection as an aid in carcass evaluation on the landrace and Yorkshire breeds

1972 ◽  
Vol 44 (1) ◽  
pp. 1-11
Author(s):  
Unto Uusisalmi
Keyword(s):  
Least Squares ◽  
Multiple Regression ◽  
Stepwise Multiple Regression ◽  
Carcass Quality ◽  
Progeny Testing ◽  
Slaughter Weight ◽  
Kidney Fat ◽  
Better Than

Information on carcass quality obtained from dissection and conventional carcass evaluation was studied on the Landrace and Yorkshire breeds. Progeny testing pigs (n = 196) were slaughtered at a weight of c. 90 kg. After conventional carcass evaluation, the carcass half was dissected. The objects of study were the most valuable parts of the half carcass (= ham + carré + back + fore back + shoulder + kidney fat) and its skin+fat and meat+bone components. The possibility of restricting the dissection to the ham and the back was also examined. By means of the least squares methods the following results were obtained: The effect of the slaughter weight on the skin+fat, the meat+bone and the valuable part was very significant. The variation due to age was not significant. The carcass quality on the gilts was better than that of the castrates. By stepwise multiple regression procedures estimations were derived for the skin+fat component, the meat+bone component and the most valuable part of the carcass. By dissection of the ham and the back more information was generally obtained about the slaughter quality of the most valuable part than was obtained by the conventional carcass evaluation. The index (= A/B x A/C x10) was calculated, in which A = weight of the meat+bone component, B = age in days and C = weight of the half carcass. The index correlated with the skin+fat component and its percentage as follows: r = —0.34**– –0.55***, and with the meat+bone component and its percentage: r = 0.77*** —0.78***. Possibilities of developing the index were examined.

The effects of nutrition on reproductive performance, lactation and carcass quality of once bred gilts

1995 ◽  
Vol 1995 ◽  
pp. 178-178
Author(s):  
A H Stewart ◽  
S A Edwards ◽  
V R Fowler
Keyword(s):  
Sugar Beet ◽  
Reproductive Performance ◽  
Feed Efficiency ◽  
Reproductive Physiology ◽  
Sugar Beet Pulp ◽  
Energy Sources ◽  
Carcass Quality ◽  
Beet Pulp ◽  
Ad Libitum

The once bred gilt system of production has a number of benefits in terms of feed efficiency and welfare, however the system relies on the production of a quality carcass and acceptable reproductive performance. Previous studies have indicated that welfare might be improved if gilts were ad-libitum fed a diet containing 60% Sugar beet pulp (Stewart et al 1993). There was a suggestion however that reproductive physiology may be put at risk using such a diet. The objective of this experiment was to identify differences in reproductive performance using two different energy sources in gestation and to manipulate nutrition during lactation to study the effect on carcass quality.

The effect of age and energy level on the growth potential of Sangsary male lambs in Iran

1996 ◽  
Vol 1996 ◽  
pp. 173-173 ◽  
Author(s):  
Y. Rouzbehan ◽  
A. Shabani ◽  
R. Assadi Moghadam ◽  
A. Nik-khah
Keyword(s):  
Energy Level ◽  
Growth Performance ◽  
Protein Content ◽  
Growth Potential ◽  
Carcass Quality ◽  
Initial Weight ◽  
Sheep Breeds ◽  
Ad Libitum ◽  
Effect Of Age

Recognition of the importance of the native sheep breeds as one of the main source of meat in Iran has led to several studies on their growth performance. There is little information available on the animal potential of Sangsary sheep, a native Iranian breed. The aim of this trial, therefore, was to assess the growth potential and carcass quality of Sangsary male lambs.Forty four entire males, 9 month (m.) old, mean initial weight 26.8 (sd 2.5) kg were used. The two diets, which consisted of concentrate and roughage, had a similar protein content (150 g CP/kg DM) and metabofisable energy of either 10.6 MJ/kg DM (diet A) or 9.2 MJ/kg DM (diet B), were each fed ad libitum to 22 lambs. The animals were group penned. At the start and end of the study, the animals were weighed on two consecutive days.

Continued studies on the effect of grain or pasture on the carcass composition and meat quality of Friesian steers

1977 ◽  
Vol 28 (4) ◽  
pp. 755 ◽  
Author(s):  
HL Davies
Keyword(s):  
Growth Rate ◽  
Meat Quality ◽  
White Clover ◽  
High Energy ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Restricted Group ◽  
Ad Libitum ◽  
Dressing Percentage

Twenty-one Friesian steers were grown to a final fasted liveweight of 469 kg. Seven of the steers grazed irrigated ryegrass-white clover pastures, seven steers were fed on a high energy ration ad libitum, and seven were given a ration of the same composition as the second group but at a restricted amount such that the growth rate was similar to that of the grazing steers. There were no significant differences in carcass weight between the three groups. The dressing percentage of the grain ad libitum group was 58%, the restricted grain group 57% and the pasture group 55%. The dressing percentage was significantly lower (P < 0.05) in the pasture group. The grain ad libitum group had 51.5% more (P < 0.05) oaental fat than the pasture group, and the restricted group 28.9% more (P < 0.05) than the pasture group. In dissections of the 9th, 10th and 11th ribs the grain ad lib. group had 35.4% fat, the restricted grain group 32.8% and the pasture group 26.5%, the proportion of fat being significantly (P < 0.05) lower in the pasture group than in the grain ad lib. group. No significant differences were found in either tenderness, juiciness or flavour between the three groups.

Influence of the physical form of oat grain on the fattening results and carcass quality of White Kołuda geese

2018 ◽  
Vol 14 (1) ◽  
pp. 23-36
Author(s):  
Eugeniusz Kłopotek
Keyword(s):  
Body Weight ◽  
Carcass Quality ◽  
Feed Conversion ◽  
Group Iii ◽  
Cultivar Group ◽  
Tissue Content ◽  
Group I ◽  
Physical Form ◽  
Dressing Percentage

The aim of the study was to examine the influence of the physical form of oat grain (whole, crushed or ground grain) on the fattening results, feed conversion and carcass quality of the W-33 strain of White Kołuda (Biała Kołudzka®) geese. A total of 90 hatchlings (45 ♂♂ + 45 ♀♀) were randomly selected for the experiment. All geese were fed in the same way until the age of 14 weeks, receiving KB-1, KB-2 and KB-3 compound feeds in the amount of up to 300 g/individual/day and grass forage ad libitum. At the end of the 14th week, the geese were divided into three feeding groups (15 ♂♂ and 15 ♀♀ in each) and in the period from weeks 15 to 17, a total of 21 days, they were fed only hulled oat grain of the Rajtar cultivar. Group I received whole grain, group II crushed grain, and group III ground grain. After the fattening was completed, 5 male and 5 female geese from each of the three experimental groups were selected for slaughter analysis. The birds receiving whole oat grain had the highest body weight, weight gain from the 15th to the 17th week of life, feed conversion and dressing percentage. Male geese had higher body weight, higher muscle tissue content, and lower adipose tissue content than females (P≤0.01). The two sexes did not differ significantly in dressing percentage or content of abdominal fat.

Feed Intake, growth and carcass quality of improved genotypes of growing/finishing pigs

1988 ◽  
Vol 1988 ◽  
pp. 135-135
Author(s):  
S.A. Chadd ◽  
D.J.A. Cole
Keyword(s):  
Growth Performance ◽  
Feed Intake ◽  
Carcass Characteristics ◽  
Carcass Quality ◽  
Finishing Pigs ◽  
Limited Information ◽  
Voluntary Feed Intake ◽  
Ad Libitum ◽  
Selection For

There have been a number of reports that voluntary feed intake (VFI) of modern pig genotypes may be the limitation to their growth performance. It has been suggested that selection for leanness (Fowler et al. 1976) and breeding for faster growth may have reduced appetite.In addition there is only limited information about the effect on VFI, performance and carcass characteristics of pigs fed ad libitum to liveweights greater than 100kg. A study was therefore undertaken to compare VFI and energy intake of improved genotypes with predicted intakes based on earlier genotypes (ARC, 1981). The associated effects on performance and carcass characteristics at heavier slaughter weights were also studied.

scholarly journals The effect of breed, sire and sex on the quality of carcass sides

2006 ◽  
Vol 22 (1-2) ◽  
pp. 79-88 ◽  
Author(s):  
Milica Petrovic ◽  
Milovan Pusic ◽  
Dragan Radojkovic ◽  
Milan Mijatovic ◽  
Olga Kosovac ◽  
...  
Keyword(s):  
Total Mass ◽  
Breeding Value ◽  
Carcass Quality ◽  
Feed Mixture ◽  
Index Point ◽  
Large White ◽  
Regression Effect ◽  
Ad Libitum ◽  
On Farm

Investigation of quality variability of pig carcass was carried out on 1443 fatlings (gilts and barrows). They were progenies of 22 (Farm A) and 12 sires (Farm B), 5 breeds-crossbreds (Swedish Landrace, Large White, Duroc Hampshire, Duroc x Hampshire). Animals were fed with standardized feed mixture semi ad libitum. The quality of carcass sides was determined on the slaughter-line according to Regulation (1985). Investigation included following traits: weight of warm carcass (MTP, kg), meat in carcass sides (KMP, kg and SMP, %), total mass and ratio of leg+shoulder+loin (MFO, kg and UFO, %). Obtained results were processed using several models (Harvey, 1990) which included sire genotype, sire, sex progeny and mass of warm carcass (regression effect). All investigated traits varied under the influence of sire genotype (P<0.01) on farm B. The effect of sire genotype was significant (P<0.01) on KMP and SMP on the Farm A. All traits of carcass quality varied under the influence of sires. Gilts had higher KMP, SMP, MFO and UFO compared to male castrated heads. Difference in Total Breeding Value between best and worst boar was 10.41 (Farm A) and 11.24 index point (Farm B).

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