scholarly journals The growth, development and meat qualities characteristics of different genotypes lambs

2021 ◽  
Vol 109 (1) ◽  
pp. 69-76
Author(s):  
V. Iovenko ◽  
◽  
I. Hladii ◽  
◽  
◽  
...  
Keyword(s):  
Growth Rate ◽  
Meat Quality ◽  
Gene Pool ◽  
Growth And Development ◽  
Live Weight ◽  
Experimental Animals ◽  
Genetic Potential ◽  
Growth Development ◽  
Ram Lambs ◽  
Meat Productivity

The growth, development and meat qualities characteristics of different genotypes lambs he growth and development features of three different genotypes ram-lambs, from their birth to six months age, were studied, in particular: purebred youngling of the Ascanian Fine-Fleeced breed (AFF), a cross of this gene pool with the Texel (AFFxT) and Merinolandschaf (AFFxM) breeds. Control over the growth and development these experimental animals was carried out by weighing in different age periods. The meat quality was assessed based on the slaughter results. It was found that the best development parameters were characteristic for the Texel crossbred with the Ascanian Fine-Fleeced breed; therefore, this crossing option has the meat productivity highest genetic potential. Keywords: sheep, genotype, live weight, linear parameters, growth rate.

scholarly journals COMPARATIVE EVALUATION OF GROWTH AND DEVELOPMENT OF TURKEY OF DIFFERENT CROSSES

2018 ◽  
pp. 98-103
Author(s):  
Y. M. Rebezov ◽  
O. V. Gorelik ◽  
T. V. Kurmakaeva
Keyword(s):  
Growth Rate ◽  
Growth And Development ◽  
Comparative Evaluation ◽  
Growth Dynamics ◽  
Live Weight ◽  
Genetic Potential ◽  
The Cross ◽  
Rates Of Growth

The results of studies aimed at comparing turkey of the live weight of the middle and heavy cross Hybrid breeds with a white broad-chested rock were carried out. The study of the live mass and its growth dynamics over the periods of cultivation was carried out by weighing. The growth rate was estimated by absolute, daily and relative increments of live weight. According to the results of the research, it can be concluded that hybrid «Hybrid» and its crosses have a higher genetic potential of productivity, have high rates of growth and its intensity, which allows before slaughtering at 120 and 150 days, depending on the cross, to obtain turkeys with a high live weight of 10.83-23.20 kg, respectively.

scholarly journals Features of growth, development and formation of meat productivity of Edilbay breed buck lambs of different types of birth

2020 ◽  
pp. 61-63
Author(s):  
Aleksey Vyacheslavovich Molchanov ◽  
Karina Alekseevna Egorova
Keyword(s):  
Growth And Development ◽  
Live Weight ◽  
Volgograd Region ◽  
Different Types ◽  
Growth Development ◽  
Meat Productivity

The article presents data on the characteristics of growth and development, as well as on the formation of meat productivity of rams of the Edilbay breed of different types of birth. The studies were carried out in the SPA “Kamyshinskoye” of the Kamyshin district of the Volgograd region on the Edilbay rams of single and double birth types. During the experiment, the indicators of live weight, basic measurements of the physique were determined, and the physique indices of the experimental rams at the age of 4 and 7 months were calculated, after which control slaughter was carried out.  

QUALITATIVE BEEF INDICATORS OF THE MIXED BREEDS CATTLE

1970 ◽  
pp. 63-67
Author(s):  
I. F. Gorlov ◽  
М. I. Slozhenkina ◽  
D. V. Nikolaev ◽  
N. I. Mosolova ◽  
А. А. Kaydulina ◽  
...  
Keyword(s):  
Meat Quality ◽  
Quality Indicators ◽  
Live Weight ◽  
The Body ◽  
Crossbred Cows ◽  
Black And White ◽  
The Third ◽  
Genetic Potential ◽  
Meat Productivity ◽  
Experimental Group

The article presents results of a study of the quality indicators of cross-bred steers raised in the conditions of modern fattening technologies. For the experiment, four groups of experimental young animals were selected: the first group included animals obtained from crossing Kalmyk bulls with crossbred cows from crossing Salers breeds with Simmental; the second group-bulls obtained from crossing Kalmyk bulls with crossbred cows, from crossing Salers bulls with black-and-white cows; the third – animals obtained as a result of crossing Hereford bulls with crossbred cows obtained from Salers bulls with Simmental cows; the fourth-bulls obtained as a result of crossing Hereford bulls with crossbred cows from crossing Salers bulls with Red pied cows. Each experimental group had 30 goals. It was found that the combination of the origin of crossbred animals of ½ blood of the Hereford breed with crossbred animals with ½ blood of the Salers and Simmental breeds contributes to a faster accumulation of live weight compared to their peers, which confirms their high "precocity" and better metabolism in the body. Over the entire period of the experiment, the bulls of the third experimental group outperformed their peers of other groups in terms of live weight dynamics, slaughter indicators and meat quality. Crossbreeding of Hereford bulls with cows with the genotype ½ Salers with Simmental breed contributed to the highest manifestation of the genetic potential of meat productivity in comparison with the studied peers.

Effects of the percentage of Texel or Rouge de ľOuest genes in lambs on carcass characteristics and meat quality

1999 ◽  
Vol 69 (1) ◽  
pp. 81-92 ◽  
Author(s):  
A. F. Carson ◽  
B. W. Moss ◽  
R. W. J. Steen ◽  
D. J. Kilpatrick
Keyword(s):  
Meat Quality ◽  
Subcutaneous Fat ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Fat Content ◽  
Carcass Weight ◽  
Ewe Lambs ◽  
Bone Content ◽  
Intermuscular Fat ◽  
Ram Lambs

AbstractThis study investigated the effects of the percentage of Texel or Rouge de l’Ouest (Rouge) genes in lambs (0, 50, 75 or 100%; the remainder being Greyface (Border Leicester × Scottish Blackface)) on lamb carcass characteristics and meat quality. Ewe lambs were slaughtered at 34, 40, 46 and 52 kg and ram lambs were slaughtered at 40, 46, 52 and 58 kg live weight. Dressing proportion increased (P < 0·001) by 0·53 and 0·27 g carcass weight per kg live weight for each 1% increase in Texel or Rouge genes respectively. Carcass conformation classification increased (P < 0·001) by 0·016 and 0·007 units (on a five-point scale) for each 1% increase in Texel or Rouge genes respectively. Carcass fat depth measures were reduced by Texel and Rouge genes such that at a constant fat depth end point, carcass weight could be increased by 0·029 and 0·023 kg for each 1% increase in Texel or Rouge genes. Carcass lean content increased (P < 0·001) by 0·99 and 0·27 g/kg for each 1% increase in Texel or Rouge genes. Subcutaneous fat content was reduced (P < 0·001) by 0·36 and 0·29 g/kg for each 1% increase in Texel or Rouge genes. Intermuscular fat content was reduced (P < 0·01) by 0·38 g/kg per 1% increase in Texel genes, whereas Rouge genes had no effect. Similarly, bone content was reduced (P < 0·01) by Texel genes only (0·31 g/kg per 1% increase in Texel genes). Warner-Bratzler shear force values showed a quadratic effect with increasing Texel and Rouge genes, with an initial decrease from 0 to 50% followed by an increase to 100%. Cooking loss increased (P = 0·05) as the percentage of Rouge genes in lambs increased. Increasing the percentage of Texel or Rouge genes significantly increased L* values (P < 0·01 and P < 0·05 respectively), b* values (P = 0·05 and P< 0·05 respectively) and H° values (P < 0·001).

Growth and Development of Organic Arsenical-Susceptible and -Resistant Common Cocklebur (Xanthium strumarium) Biotypes Under Noncompetitive Conditions

1994 ◽  
Vol 8 (1) ◽  
pp. 154-158 ◽  
Author(s):  
William E. Haigler ◽  
Billy J. Gossett ◽  
James R. Harris ◽  
Joe E. Toler
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Plant Height ◽  
Growth And Development ◽  
Reproductive Potential ◽  
Dry Weight ◽  
Growing Season ◽  
Xanthium Strumarium ◽  
Relative Growth ◽  
Growth Development

The growth, development, and reproductive potential of several populations of organic arsenical-susceptible (S) and -resistant (R) common cocklebur biotypes were compared under noncompetitive field conditions. Plant height, leaf area, aboveground dry weights, and relative growth rate (RGR) were measured periodically during the growing season. Days to flowering, bur dry weight, and number of burs per plant were also recorded. Arsenical S- and R-biotypes were similar in all measured parameters of growth, development, and reproductive potential. Populations within each biotype varied occasionally in plant height, leaf area, aboveground dry weights, and reproductive potential.

Effects of parasitization by the insect parasite Hyposoter exiguae on the growth, development and physiology of its host Trichoplusia ni

Parasitology ◽  
1982 ◽  
Vol 84 (3) ◽  
pp. 491-510 ◽  
Author(s):  
S. N. Thompson
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Growth And Development ◽  
Trichoplusia Ni ◽  
Fat Body ◽  
Weight Ratio ◽  
Juvenile Hormone Esterase ◽  
Insect Parasite ◽  
Wet Weight ◽  
Growth Development

SummaryThe weight gain and growth rate of Trichoplusia ni larvae were severely depressed following parasitization by the insect parasite, Hyposoter exiguae. The development of the host was also delayed and juvenile hormone esterase activity present at the normal time of moulting was absent in parasitized insects. Similar effects on growth and development were achieved by rearing host insects on nutrient-deficient media. Accompanying the above effects of parasitization were alterations in dry/wet weight ratio and host haemolymph osmolality. Parasitization resulted in immediate increases in the concentrations of haemolymph non-glycogen carbohydrate (composed of trehalose, maltose and glucose) and protein. The concentration of fat body glycogen also increased following parasitization. In contrast, the concentration of haemolymph non-glycogen carbohydrate and protein, as well as fat body glycogen, decreased in nutrient-deprived larvae. The significance of the above results as they relate to the insect parasite–host relationship is discussed.

Interaction between competitors and predators and its effects on morphological and behavioural defences in Scinax nasicus tadpoles

Behaviour ◽  
2013 ◽  
Vol 150 (8) ◽  
pp. 921-937 ◽  
Author(s):  
Valeria I. Gómez ◽  
Arturo I. Kehr
Keyword(s):  
Growth Rate ◽  
Experimental Design ◽  
Growth And Development ◽  
Chemical Cues ◽  
Development Rate ◽  
Larval Morphology ◽  
Induced Defences ◽  
Morphological Defences ◽  
Growth Development ◽  
Determinant Factor

Predation affects the behaviour of organisms, and the number of conspecifics can influence the perception of predation risk. Two main types of traits, morphological and behavioural, are involved in the induced defences of many organisms. Here, we examined the influence of chemical cues of the predators Belostoma elongatum (Hemiptera, Belostomatidae) and Moenkhausia dichroura (Characiformes, Characidae) on the morphology, growth, development and activity of Scinax nasicus larvae. Our main goal was to determine whether the investment in morphological or behavioural defences varied according to the number of conspecifics and to the chemical cues of predators. To this end, we performed two experiments under microcosm conditions. In experiment 1, we determined morphological defences in tadpoles by analysing changes in morphology, growth rate and development rate, whereas in experiment 2, we determined behavioural defences by analysing changes in the activity of tadpoles. The experimental design consisted of two tadpole densities, with and without chemical cues of predators. We found that: (1) larval morphology, growth and development were significantly affected by density; (2) the chemical cues of the predators did not influence the morphology, growth or development of tadpoles; (3) tadpoles at high densities were more active than those at low densities; (4) tadpoles decreased the activity in the presence of chemical cues of M. dichroura; and (5) tadpoles increased the activity in the presence of chemical cues of B. elongatum. Our results suggest that density is a determinant factor of tadpole morphology of and that Scinax nasicus larvae respond to predators with behavioural defences, which vary according to the type of predator.

scholarly journals Growth rate and meat quality of guinea fowl kept in farm conditions

2021 ◽  
Vol 22 (4) ◽  
pp. 581-588
Author(s):  
Vladimir A. Zabiyakin ◽  
Sergey A. Zamyatin
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Live Weight ◽  
Unknown Origin ◽  
Guinea Fowl ◽  
Live Weight Gain ◽  
White Breed ◽  
Feed Costs ◽  
Meat Productivity ◽  
Edible Parts

The research (2018-2019) was conducted in the conditions of a peasant farm in the Voronezh region. The paper evaluates the indicators of the growth rate and meat productivity of the preserved gene pool groups of guinea fowl. The experiment involved three groups of daily guinea fowl of 200 heads of different genetic origin: lines of the Volga white breed (the original VB-4, selected by the rate of live weight gain and reproductive characteristics; autosex VBA-1, selected by the color of down, feather and productive characteristics) and gray-speckled guinea fowl of unknown origin. Studies have shown that the live weight of guinea fowl of the VBA-1 line exceeded the live weight of poultry from other groups of guinea fowl, a significant excess was noted at 8, 12 and 13 weeks of age. The greatest coefficient of variation of the trait was observed at 8 weeks of age. The analysis of relative gain in live weight of guinea fowl showed that up to 10 weeks of age, the highest relative growth rate of guinea fowl of all experimental groups was observed (14.0-17.0 %). Starting from the age of 11 weeks, this indicator gradually decreased (4.3-13.4 %). It was found out that under the same conditions of keeping and feeding, the feed costs per 1 kg of live weight gain in guinea fowls of the VBA-1 line were less by 0.09-0.16 kg (3.11-6.33 %) compared to poultry of the VB-4 line and by 0.2-0.4 kg (5.49-12.82 %) compared to their gray-speckled peers. The results of anatomical cutting of guinea fowl carcasses showed that the experimental groups of poultry significantly (P< 0.05) differed among themselves in the degree of development of internal organs and tissues. The yield of edible parts was 60.2-61.1 %, depending on the group of poultry. The large live weight noted by us in linear poultry is the reason for their better meat productivity, which is directly related to an increase in the absolute mass of the eviscerated carcass, its edible parts, muscles and bones. Based on the data obtained, the optimal age of poultry slaughter for meat was determined at 10-12 weeks of life.

scholarly journals Influence of complex feed additives on the meat productivity of young cattle in the conditions of Yakutia

2021 ◽  
Vol 845 (1) ◽  
pp. 012030
Author(s):  
A I Grigoreva ◽  
M F Grigorev ◽  
D I Stepanova ◽  
S I Stepanova
Keyword(s):  
Growth Rate ◽  
Visceral Fat ◽  
Raw Materials ◽  
Meat Products ◽  
Live Weight ◽  
Feed Additives ◽  
Control Group ◽  
Organoleptic Evaluation ◽  
Young Cattle ◽  
Meat Productivity

Abstract The paper presents the results of fattening young cattle in the conditions of Yakutia with the use of complex feed additives from local natural raw materials in their diets. One of the ways to increase the meat productivity of livestock is to optimize feeding by inserting complex feed additives into their diets. Therefore, studies were conducted to determine the effectiveness of complex feed additives in the fattening of young cattle in the conditions of Yakutia. At the beginning of the experiment, the live weight of the animals in the groups did not differ much, but starting from the age of 12 months, the superiority of the animals from the experimental groups is noted. In the period of 12-15 months of age, the animals from the experimental groups exceeded the growth rate of the control group by 6.70% and 4.76%. In the period of 15-18 months old, the animals of the control group were inferior to the experimental groups by 28.31% and 16.54%. On average, the animals of the experimental groups grew more intensively in comparison with the control group by 12.73% and 8.66 %. Analysis of animal slaughter data showed that the experimental groups were superior to the control group in a number of indicators, such as the mass of the steam carcass by 8.04% and 4.43 %, the mass of visceral fat by 18.59% and 7.39%. The organoleptic evaluation of meat products also confirmed the superiority of the experimental groups over the control group. Thus, the use of complex feed additives in the feeding of young cattle on fattening showed its effectiveness.

scholarly journals USING BOARS OF CANADIAN BREEDING TO IMPROVE THE MEAT QUALITIES OF LARGE WHITE PIGS

2018 ◽  
pp. 83-92
Author(s):  
V. A. Bekenеv ◽  
V. I. Frolova ◽  
V. S. Deeva ◽  
I. V. Bolshakova ◽  
Yu. V. Frolova
Keyword(s):  
Growth Rate ◽  
Live Weight ◽  
The Other ◽  
Fourth Generation ◽  
Control Group ◽  
Thoracic Vertebrae ◽  
Frequency Of Occurrence ◽  
Large White ◽  
Significant Difference ◽  
Meat Productivity

Three experiments were carried out to improve the meat productivity of pigs of Large White (LW) breed of russian selection by different variants of crossing with the Yorkshire (Y) breed of canadian selection. There were no significant differences between the groups in terms of reproductive qualities. Two-breed pigs (LW x Y) grew more intensively and the live weight of the piglet at the 30 days was 8,7 kg, which is higher than in the other groups with a significant difference (P <0,05). When the live weight of 100 kg was reached, the вackfat thickness of the fat over 6-7 thoracic vertebrae was 26,3 mm compared to 30,7 mm in purebred pigs of the LW of the breed (P <0,001), the area of the muscular eye was respectively 45,1 cm 2 and 30,6 cm 2 (P <0,001). In the fourth generation of reproductive and absorbent crossing of pigs of LW and Y of breeds, the thickness of the fat on the carcasses of pigs was 21,2 mm (Р < 0.001), which is 30-39 % less than for the LW carcasses, the area of the muscular eye was 44 mm. In three-breed hybrids (LW x D) x L, the age of reaching 100kg was less by 12,5 days (P <0,01), the thickness of the fat was 23,6 mm, that is, it was 11,4 mm less (P < 0,001) in comparison with the control group. The replacement pigs obtained from the absorbent crossing (LW x Y) x Y showed the best results for the вackfat thickness - 19,2 mm, but they were inferior to the purebred Y (13,0 mm) (P <0,001). In the sows of this combination, 11,6 piglets were born alive, the number of piglets at weaning was 10,6, the weight of the nest in the 30-day was 78,7 kg. Differences in the frequency of occurrence of certain antigenic factors of blood in animals of different combinations of breeds are revealed. In animals that have the EAE allele edf, a higher growth rate is revealed, but thicker the backfat.

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