scholarly journals THE EFFECTIVENESS OF THREE-BREED CROSSINGS FOR INCREASING MEAT PRODUCTIVITY IN YOUNG SHEEP

2021 ◽  
Vol 61 ◽  
pp. 83-89
Author(s):  
P. I. Lyutskanov ◽  
O. A. Mashner ◽  
S. A. Evtodiyenko ◽  
V. T. Petku
Keyword(s):  
Weight Gain ◽  
Live Weight ◽  
Head Length ◽  
Internal Organs ◽  
Absolute Weight ◽  
Digestive Organs ◽  
Ewe Lambs ◽  
Depth Index ◽  
Ram Lambs ◽  
The Absolute

This publication presents the results on the growth, development, live weight, body indices in ram lambs and ewe lambs of three-breed crossbreeds ♀ (♀Karakul 18.7% x ♂Avassi 31.3%) x ♂Assaf 50.0% and purebred Assaf, as well as the dynamics of the live weight gain of lambs from birth to 4–4.5 months of age. Crossbreed lambs are developed better than purebred lambs. The absolute weight gain in the ram lambs ♀ (♀Karakul 18.7% x ♂ Avassi 31.3%) x ♂Assaf50.0% was 4.8 kg, which is by 0.32 kg (7.1%) higher in relation to the ram lambs of the Assaf breed, the average daily weight is also higher by 5.4 g. According to the same trend, crossbred ewe lambs had a gross weight gain of 3.72 kg or by 0.22 kg (6.3%) more than in purebred ones and the average daily weight are also higher by 3.2 g. Of the eight body indices, crossbred ram lambs and ewe lambs have five indices that exceed the obtained indicators in purebred animals, and in purebred lambs only three body indices are superior. In ram lambs of the Assaf breed, the indicators for three indices are higher in comparison to crossbreeds: transverse by 0.78%, chest by 0.5% and robustness by 4.65%, and for three-breed crossbreeds they are higher in relation to purebred ones according to the following 5 indices: body format by 4.33%, massiveness by 1.28%, bones by 0.58%, forehead width by 3.74% and head length by 1.42%. The indices of body format, bones and head length are also higher in the purebred ewe lambs by 0.12%, 0.46% and 1.36%, and in the crossbreeds the indices of transverse, massiveness, chest, and head width are higher by 1.21%, 1.35%, 2.02%, 0.29% and 2.97%. The slaughter qualities of crossbreeds are higher for the most indicators taken into account, with the exception of the area of sheepskins. The slaughter weight of crossbred ram lambs is higher by 1.62 kg (13.2%) compared to purebred ram lambs, and the slaughter yield of carcasses is also higher by 2.88%. After deboning chilled half-carcasses, the mass of meat was higher in crossbred animals in comparison to purebred animals by 0.59 kg or 14.8%. All this denoted an higher meat ratio characterizing the relative development of bones and muscle tissues in crossbred animals with made up 2.51 vis-a-vis 2.34 in purebred ones. The highest weight of sheepskins was in crossbred ram lambs and amounted to 3.76 kg, which is by 0.65 kg or by 20.9% more than in peers. At the same time, purebred ram lambs had the largest sheepskins area of 80.3 dm2, which are by 5.52 dm2 (8.51%) more than in crossbreeds. The interior parameters of the internal organs, the development of the digestive organs are closely related to the constitutionally productive characteristics of sheep. The internal organs of crossbred ram lambs, which also have the greatest pre-slaughter live weight, are somewhat better developed. At the same time, they surpassed their purebred peers in the mass of the lungs, spleen and kidneys. The weight of the lungs indicates the volume of respiration and the redox processes occurring in it, on which depend the health and endurance of animals. There were no significant differences in the absolute weight of the lungs in both groups of animals and they were almost the same and ranged from 0.550 g to 0.555 g. Thus, our results indicate that there is a positive relationship between the productivity of ram lambs and the development of their internal organs. The digestive organs and their development ensure the future productivity of the animal. Crossbreed lambs by weight of the stomach without the contents of 973.2 g exceed they peers by 1.4%. The total length of the intestine also for this group of ram lambs is 36.38 meters or more than by 2.36%. In total, all this can lead to better use of the feed, increasing its digestibility. At the ends of the slaughter were taken from each carcass their measurements and the indices were calculated. In crossbred three-breed ram lambs, all carcass evaluation indices are higher in comparison with purebred ones, with the exception of the chest depth index. The lamb leg development index in crossbreeds is significantly higher by 22.52% (P < 0.01), and in Assaf ram lambs is significantly higher the breast depth index if compared to crossbreeds by 14.61% (P < 0.001). According to the chemical composition of meat in the group of purebred ram lambs and in the group of crossbreeds, the content of water in meat, protein and collagen is within the normal range and almost the same. The high fat values in three-breed crossbreeds are 6.88%, which is by 2.15% more than in purebreds.

Effects of sex and gonadectomy on the growth and development of Southdown × Romney cross lambs. Part I. Effects on live–weight growth and components of live weight

1966 ◽  
Vol 66 (1) ◽  
pp. 1-14 ◽  
Author(s):  
G. C. Everitt ◽  
K. E. Jury
Keyword(s):  
Weight Gain ◽  
New Zealand ◽  
Growth And Development ◽  
Live Weight ◽  
Carcass Weight ◽  
Male And Female ◽  
Live Weight Gain ◽  
Ewe Lambs ◽  
Weight Growth ◽  
Ram Lambs

The influence of sex and gonadectomy on liveweight growth and its components was examined in a comparative slaughter experiment using Southdown – Romney cross lambs run under New Zealand pastoral feeding conditions.Twenty ram lambs were castrated and 20 ewe lambs spayed at docking, at approximately 4 weeks of age. Ten ram and 10 ewe lambs were killed at this age and 5 lambs from each of the four ‘sexes’ (entire and gonadectomized, male and female) were killed 4, 8,12 and 24 weeks after docking.Live-weight gain was higher for males than females and higher for entire than gonadectomized lambs, with some evidence of a greater depression in growth associated with castration than spaying. Effects on carcass weight followed those on live weight; weights for entire rams, wethers, entire and spayed ewes were 16.92, 14.72, 14.02 and 12.46 kg. respectively at approximately 7 months of age.

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).

scholarly journals DYNAMICS OF GROWTH IN THE GOUSES UNDER CONDITIONS OF THE COMBINED PHARMACOPROPHYLACTIC HOMOBIOTICS, PROBIOTICS BASED ON THE RECOMBINANT BASILL AND ENROFLOXACIN STRAIN

2019 ◽  
pp. 104-110
Author(s):  
G. A. Nozdrin ◽  
N. A. Gotovchikov ◽  
M. S. Yakovleva ◽  
N. S. Yakovleva ◽  
M. B. Lazareva
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Weight Gain ◽  
Body Weight Gain ◽  
Physiological State ◽  
Average Daily Gain ◽  
Live Weight ◽  
Absolute Weight ◽  
Probiotic Preparation ◽  
Daily Gain

The combined effect of homobiotics, probiotics based on recombinant strains of g. Bacillus, & enrofloxacin on the dynamics of body weight gain in geese was studied. According to the principle of steam-analogs, one control and five experimental groups of 10 goslings in each group were formed. Gosyatam experimental groups used homobiotics vetom 15.1; vetom 13.1 incombination with enrofloxacin followed by replacement with a probiotic preparation Vetom 1.2. The absolute body weight and average daily gain in geese under the influence of the studied drugs increases. The severity of the effect depended on the pharmacological composition of the drugs used. The maximum absolute weight gain was observed when using the drugs according to the scheme: vetom 13.1 at doses of 25–50 mg/kg for 16 days, with further use of a 10% enrofloxacin solution at a dose of 0.5 ml/kg for 5 days and in The experiment period was 1.2 at a dose of 50 mg/kg for 16 days. After the cessation of the use of drugs, the growth rate increased for 30 days when prescribing the drugs according to the scheme: veto 13.1 at a dose of 50 mg/kg for 16 days and with further introduction of homobiotic veto 1.2 into the bird in a dose of 50 mg/kg for 16 days. The maximum average daily gain in live weight of geese was observed in the period from the 16th to the 32nd day with the administration scheme: homobiotic vetom 13.1 at a dose of 25 mg/kg of body weight 1 time per day for 5 consecutive days, then every other day for 16 days, then daily 10 % solution of enrofloxacin at a dose of 0.5 ml/kg of body weight for 5 days, then vetom 1.2 at a dose of 25 mg/kg once a day for 16 days in a row. And the maximum average daily gain in the post using period of the drug was observed on the 32nd day of the study according to the scheme: homobiotic veto 15.1 at a dose of 50 mg/kg of body weight 1 time per day for 16 days, then daily with vetom 1.2 at the same dose 1 once a day for 16 days. The studied drugs in the applied doses did not have a toxic effect on the physiological state of geese.

Growth and body composition of Omani local sheep 1. Live-weight growth and carcass and non-carcass characteristics

1994 ◽  
Vol 58 (3) ◽  
pp. 365-372 ◽  
Author(s):  
O. Mahgoub ◽  
G. A. Lodge
Keyword(s):  
Alimentary Tract ◽  
Live Weight ◽  
Similar Rate ◽  
Weight Group ◽  
Ewe Lambs ◽  
Weight Growth ◽  
Early Maturing ◽  
Good Potential ◽  
Ram Lambs ◽  
Omental Fat

AbstractForty-five local Omani ram, wether and ewe lambs were reared from birth until slaughter at 18, 28 or 38 kg live weight (five of each ‘sex’ at each weight group) on an ad libitum concentrate diet and Rhodesgrass hay.Ram lambs grew faster from birth and reached predetermined slaughter weights earlier than wether and ewe lambs. At 28 kg live weight, ram lambs had: heavier heads, feet, reticulo-rumens and livers; higher muscle and bone and lower fat proportions in the carcass; lower muscle: bone and higher muscle: fat ratios; higher proportions of carcass but lower non-carcass fat than had wether and ewe lambs. The head, feet, alimentary tract, liver and heart of Omani sheep grew at a lower rate; the skin grew at a similar rate and the carcass grew at a rate faster than empty body weight (EBW). Relative to EBW, muscle grew at a similar rate, fat faster and bone slower. Both carcass and non-carcass fats grew at a rate higher than that of the growth of EBW, with non-carcass fat growing at a higher rate than that of carcass fat. The growth rate of omental fat was the fastest followed by kidney, mesenteric, subcutaneous, tail, scrotal, intermuscular and pelvic fats respectively.This study demonstrated that Omani sheep have good potential for growth if they are managed and fed satisfactorily. Omani sheep are early maturing for which reason it is recommended that they be slaughtered at lighter weights to avoid higher fat content in the carcass. Castration in Omani sheep is not recommended for production of meat lambs under intensive systems as it resulted in reduced growth rates and deposition of excess fat at lower slaughter weights.

The effect of hexoestrol on growth, carcass quality, endocrines and reproductive organs of ram, wether and female lambs

1960 ◽  
Vol 2 (01) ◽  
pp. 11-25 ◽  
Author(s):  
T. R. Preston ◽  
Isoline Greenhalgh ◽  
N. A. MacLeod
Keyword(s):  
Live Weight ◽  
Reproductive Organs ◽  
Mammary Development ◽  
Seminal Vesicles ◽  
Control Group ◽  
Ewe Lambs ◽  
Group A ◽  
Ram Lambs ◽  
Group B ◽  
Group D

1. Two experiments were made. In Experiment 1, 124 ram, wether and ewe lambs were allocated to four equal groups as they reached a live-weight of 30 lb. Group A received no hexoestrol; group B were implanted with a 15 mg. pellet of hexoestrol and lambs of group C were given a second pellet of 15 mg. 35 days after the first. Group D were implanted with three 5 mg. pellets simultaneously in three different sites. The lambs were creep-fed while running with their dams on pasture and were killed as they reached a live-weight of 95 lb.In Experiment 2, 20 weaned ram lambs were allocated to a hexoestrol-implant group or a control group as they reached a live-weight of 40 lb. They were fed a pelleted ration indoors and were slaughtered at a live-weight of 110 1b.2. Length of teats and weight of the pituitary were significantly increased for all lambs treated with hexoestrol as compared with their controls. Excessive mammary development and one case of rectal prolapse were observed i n treated ewe lambs, while 3 of the treated rams in Experiment 2 had scrotal oedema.3. The rate of live-weight gain was greater for all hexoestrol-implanted lambs in Experiment 1 but less for the implanted lambs on Experiment 2 as compared with their respective controls. The differences just failed to attain significance at the 5% level.4. Dressing percentage was significantly reduced by hexoestrol treatment i n Experiment 1. On the other hand treated ram lambs in Experiment 2 had significantly higher dressing percentages and appeared to be fatter than the controls.5. Weights of testes and seminal vesicles in the ram and of the ovary in the ewe were decreased by hexoestrol treatment. Weights of seminal vesicles in the wether and of oviducts and uterus in the ewe were increased.

scholarly journals EFFECT OF ADDITION OF TEMULAWAK EXTRACT (Curcuma xanthorriza) ON ARTIFICIAL FEED ON GURAMI FISH GROWTH (Osphronemus goramy)

2021 ◽  
Vol 1 (2) ◽  
pp. 68-79
Author(s):  
Dian Ananda ◽  
Saptono Waspodo ◽  
Baiq Hilda Astriana
Keyword(s):  
Weight Gain ◽  
Fish Growth ◽  
Absolute Weight ◽  
Randomized Design ◽  
Commercial Feed ◽  
Length Increase ◽  
Absolute Length ◽  
Test Fish ◽  
Completely Randomized Design ◽  
The Absolute

The problem with gouramy cultivation was slow growth due to the short intestines of gouramy so that the absorption of feed takes longer and less. Several previous studies used temulawak in the form of flour, extract, oil which was applied to carp, tilapia, milkfish, catfish. The addition of extract, temulawak flour to the feed gave an increase in growth both in length and weight in the test fish. The purpose of this study was to determine whether or not the effect of temulawak extract on the growth of gouramy fish. This research was conducted for 45 days. This research was conducted by experimental method using a completely randomized design (CRD) with 5 treatments (P) 3 times replication (U), in order to obtain 15 experimental units. Treatment 0 Control (without temulawak extract), Treatment 1 Provision of temulawak extract with a concentration of 14%/kg feed, Treatment P2 Administration of temulawak extract with a concentration of 16%/kg feed, treatment P3 Administration of temulawak extract with a concentration of 18%/kg feed, and treatment P4 administration of temulawak extract with a concentration of 20%/kg feed. The results showed that in the P0 treatment the absolute weight gain was 0.78 grams, in the P1 treatment the absolute weight was 0.58 grams, the P2 treatment was 0.33 grams, the P3 treatment was 0.37 grams, and in the P4 treatment it was obtained The result of absolute weight gain was 0.39 grams. The results showed the absolute length increase ranged from 0.35-0.57 cm. It can be concluded that the addition of temulawak extract to the commercial feed of carp has no significant effect on absolute weight, absolute length, survival rate and feed efficiency level.

scholarly journals Effect of selected factors on basic reproduction, growth and carcass traits and meat production in Texel sheep

2011 ◽  
Vol 59 (5) ◽  
pp. 247-252 ◽  
Author(s):  
Ladislav Štolc ◽  
Martin Ptáček ◽  
Luděk Stádník ◽  
Marek Lux
Keyword(s):  
Litter Size ◽  
Carcass Traits ◽  
Live Weight ◽  
Meat Production ◽  
Data Set ◽  
Ewe Lambs ◽  
Fat Thickness ◽  
Ram Lambs ◽  
And Gender ◽  
Daily Gain

The objective of this work was to determine the effect of lambing year, sire effect, parity of ewes’ lambing (PL) and gender on selected indicators of meat production and fertility in a Texel sheep herd. The evaluation proceeded for a period of 5 years, when 356 ewe – lambs and 321 Texel ram – lambs were monitored. Processing of the data set was done by the SAS program, GLM procedure. The lambing year had a significant effect (P < 0.05; 0.01) on all indicators observed except litter size. The sire effect was found to be significantly (P < 0.05; 0.01) related to all indicators monitored. The significant differences (P < 0.01) were found in fat thickness and lambs’ muscularity. The frequency of lambs’ gender was not significantly affected by the litter size and number of lambs weaned. Lambs’ gender affected the MLLT depth of lambs nonsignificantly. Litter size, as well as the number of weaned lambs, increased with the higher PL (1.44 with primiparas, 2.17 with ewes at the 5th and subsequent lambings, P < 0.01; resp. 1.31 with primiparas, 2.01 with ewes at the 5th and subsequent lambings, P < 0.01). The live weight at 100 days of age was significantly lower in lambs from the 5th and following litters, as well as the daily gain from birth till 100 days of age (DG 100) and MLLT depth in comparison to the 2nd, 3rd and 4th litters (P < 0.05). On the average, ram – lambs reached a higher live weight at 100 days of age (+1.79 kg, P < 0.01), and DG 100 in contrast to female (+17.22 g, P < 0.01).

The effects of castration and of the poll gene on prime lamb production

1964 ◽  
Vol 4 (15) ◽  
pp. 386 ◽  
Author(s):  
WA Pattie ◽  
AC Godlee ◽  
PE Bouton
Keyword(s):  
Agricultural Research ◽  
Live Weight ◽  
First Grade ◽  
Taste Panel ◽  
Carcass Weight ◽  
Research Station ◽  
Agricultural Research Station ◽  
Ewe Lambs ◽  
Ram Lambs

During 1961 and 1962 experiments were conducted at Tamworth Agricultural Research Station to evaluate the effect of several castration treatments and of the poll gene on prime lamb production. Ram lambs and lambs sterilized by removal of the cauda epididymis had significantly heavier live weights at 16 weeks of age than did partially castrated lambs (half of each testis removed). These in turn were significantly heavier than wethers and ewes. Among single lambs, rams and sterilized rams had carcasses that were nine per cent heavier than those of wether and ewe lambs (P<0.01). With twins this difference was reduced to 1.3 per cent for wethers (n.s.) and eight per cent for ewes (P<0.05). The average carcass weight of partially castrated lambs was between these two groups. Mean horn volumes and preputial adhesion scores suggested that these lambs had less endogenous androgen than rams and sterilized lambs. All single lamb carcasses were classed as First Grade. There were no significant differences in the number of twin lambs that were down-graded in each treatment. Fifty-four per cent of the ram and sterilized ram carcasses were classed as Ram and would be subject to a price penalty regardless of their carcass grade. Taste panel tests of meat from the hind legs of wether and sterilized ram carcasses showed that the sterilized ram meat was slightly more acceptable. There were no significant differences in live weight, carcass weight or carcass grade between polled and horned lambs.

scholarly journals IMMUNIZATION OF LAMBS AGAINST SOMATOSTATIN TO IMPROVE GROWTH RATE

1990 ◽  
Vol 70 (4) ◽  
pp. 1091-1097 ◽  
Author(s):  
G. J. MEARS
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Weight Gain ◽  
Human Serum ◽  
Conversion Efficiency ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Ewe Lambs ◽  
Ram Lambs ◽  
Efficiency Rate

Weight gain, shoulder height and feed intake responses to immunization against somatostatin (SRIF) were examined in three experiments with a total of 78 lambs. Initial immunizations against SRIF occurred when lambs were 4, 8 and 3 wk old for exps. 1, 2 and 3, respectively, with booster immunizations 2, 4, 6, 8 and 10 wk later. Control lambs were left untreated except in exp. 3 where one group of control lambs was immunized with human serum alpha globulin. Treated lambs were immunized with SRIF conjugated to human serum alpha globulin. Experiments were terminated when lambs reached 45 kg body weight. SRIF immunization did not alter lamb shoulder height or feed conversion efficiency. Rate of gain of ram and wether lambs, but not ewe lambs, was improved by SRIF immunization. Wether lambs in exp. 1 and ram lambs in exp. 2 gained 21 and 15% more, respectively, than their controls by 20 wk of age. In exp. 3, SRIF-treated 3/4 Romanov ram lambs gained 13% more than their controls by 19 wk of age. However, SRIF-treated 7/8 Romanov lambs gained only 3% more than controls during this time. In conclusion, immunizing wether and ram crossbred lambs against somatostatin increased their growth rates sufficiently to reduce the time needed to reach market weight by 2–3 wk. However, feed conversion efficiency was not improved by somatostatin immunization. Key words: Somatostatin, SRIF, immunization, growth rate, lambs

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