Relationship between Birth Weight and Body Growth of Awassi Lambs during Early Weaning (original) (raw)
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Indian Journal of Animal Research, 2022
Background: Among the three varieties of Nellore sheep, Nellore brown was most popular among the shepherds of Telangana state. The research on the performance of the other two varieties i.e. Palla and Dora was done extensively in their home tract but less data was available about performance of Nellore brown under different system of rearing. The growth rate of lambs was highest from birth to weaning in their life. The system of rearing can influence both growth rate and biometrical measurements of the lamb. The performance of the lambs during this stage influence the productive and reproductive performance in the lifetime. Methods: Sixty Nellore brown ewes (1.5-2 years) were selected from Sheep unit, Livestock Research Station, Mamnoor, Telangana for the present study. The lambs born in intensive (G1, lambs born N= 14), Semi-intensive (G2, lambs born N= 14) and Extensive (G3, lambs born N= 12) system of rearing were used to study the growth performance and biometry of lambs from birth to weaning. Result: The birth weight (kg) of lambs in G1 and G2 groups were significantly (P<0.01) higher than lambs in G3 group. The weaning body weight (Kg) was significantly higher (P<0.01) in G1 group as compared to weaning body weights in G2 and G3 group. The mean average ADG (gm) of lambs from birth to weaning was significantly (P<0.01) higher in G1 (105.4±0.19) followed by G2 (97.9±0.14) and G3 (92.8±0.07) group. The mean pin shoulder length (cm) of lambs at birth in G1 group was higher than G2 and G3 group but had a significant (P<0.05) difference with the only G3 group. In G1 group, the mean heart girth (cm) of lambs from15 th day to weaning was significantly (P<0.01) higher than G2 and G3 groups. The mean gain in paunch girth from birth to weaning in lambs of three groups was nearly 19 cm and had no significant (P<0.05) difference between groups.
Relationship between birth weight and body growth characteristics of lambs
Biotehnologija u stocarstvu, 2014
Research was carried out in population of R2 generation Pirot pramenka x Pirot improved sheep during period of three years. Lambs were divided into three groups: I from 2.5 kg to 3.5 kg; II from 3.6 kg to 4.5 kg; III from 4.6 kg to 5.5 kg. Weight of lambs was controlled at birth, with 30, 60 and 90 days of age. Average body weight at birth of the tested lambs was 3.35 kg in the first group, 4.30 kg in the second group and 5.06 kg in the third group. At 30 days of age, the body weight of the lambs was 10.19 kg in the first group, 11.39 kg in the second and 12.49 kg in the third group. All these differences in body weight of lambs at birth were statistically highly significant (P_ 0.01). With 60 days of age, average body weight was 16.48 kg in the first group, 19.01 kg in the second and 20.49 kg in the third group. Differences between groups of lambs at this age were statistically very significant (P_0.01).On the end of experiment at 90 days of lambs age, we have found the following v...
Ankara Üniversitesi Veteriner Fakültesi Dergisi, 2015
In this study, the data were collected from 1271 heads of Awassi lambs raised in the GAP International Agricultural Research and Training Center in Diyarbakır, Turkey. Birth and weaning weight (at 90 days) of lambs were measured and average daily weight gain from birth to weaning was calculated. The effect of the years and season of lambing, age of dam, sex and birth type on birth weight (BWT), weaning weight (WWT) and average daily weight gain (ADWG) from birth to weaning were investigated. Overall means were 4.81±0.022 kg for BWT, 22.99±0.196 kg for WWT and 201.67±1.173 g for ADWG. The all tarits in the analyses were significantly (P<0.05) affected by all factors in the model. In addition, lambs born heavier grew faster and reached heavier WWT (p<0.01). Based on the single and multiple trait analyses, heritability estimates ranged from 0.21 to 0.25 for BWT, from 0.13 to 0.17 for WWT and from 0.13 to 0.17 for ADWG. Estimates of genetic correlations between BWT with WWT and ADWG were 0.61 and 0.61, respectively.
Pre-weaning growth performance and carcass traits of Awassi and Chios-Awassi lambs
South African Journal of Animal Science
One hundred and three lambs (26 Chios-Awassi (CA) and 77 Awassi (AA)) were used to evaluate the effect of crossbreeding on growth performance, body dimensions and carcass characteristics. At weaning, 8 CA and 8 AA male lambs were randomly selected to examine carcass traits. Crossbred CA lambs were heavier at birth than their AA counterparts, while average daily gain (ADG) and weaning weights were not affected by genotype. CA lamb genotype had greater diagonal body length, hip height and heart girth than AA lambs. Hot and cold carcass weight, dressing percentage, body length, leg length, maximum shoulder width, and width behind shoulder were greater in CA lambs compared with AA lambs. AA lambs had significantly heavier fat tail and leg cut weights, while shoulder cut weights were heavier in the CA lambs. CA lambs had greater rib fat depth and tissue depth thickness than AA lambs. Longissimus muscle area was significantly greater in CA than in AA lambs. In conclusion, CA lambs had greater birth weights, body dimensions and dressing percentage than AA lambs. Additionally, aside from the tail and leg cuts, carcass components were heavier in CA crossbred lambs.
Genetic Analysis of Pre-Weaning Growth Traits of Barki and Rahmani Lambs
Egyptian Journal of Animal Production, 2019
Data relevant to 704 Barki and 732 Rahmani lambs born at Alexandria University Experimental Station between 1991-2014 were utilized in this investigation to estimate genetic parameters, breeding values and genetic trends of birth weight (BW), weaning weight (WW) and average daily gain (ADG). The fixed effects of season and year of birth, sex of lamb, type of birth and parity on the considered traits were also studied. The least squares analysis with unequal subclass numbers showed that the overall means of BW, WW and ADG of Barki lambs were 3.69 kg, 20.53 kg and 139.7 g, respectively, the corresponding values for Rahmani lambs were 3.54 kg, 20.09 kg and 137.8 g, respectively. The analysis also indicated that fixed factors effects on all studied traits of both breeds were generally significant (P<0.01or P<0.05) except for the effects of year of birth on BW and parity on WW and ADG of Barki lambs were not significant. Genetic parameters and breeding values for the studied traits were estimated using the Wombat programme fitting Multiveriate Animal Models. Estimates of the direct heritability (h 2 a) were 0.186, 0.078 and 0.073 for BW, WW and ADG of Barki lambs, respectively. The corresponding values for Rahmani lambs were 0.285, 0.130 and 0.121, respectively. Estimates of the maternal heritability (h 2 m) were 0.121, 0.099 and 0.103 for BW, WW and ADG of Barki lambs, respectively. The respective values for Rahmani lambs were 0.097, 0.040 and 0.033, respectively. Estimates of the fraction of variance due to maternal permanent environmental effects (C 2) were 0.024, 0.022 and 0.016 for BW, WW and ADG of Barki lambs, respectively. The corresponding values for Rahmani lambs were 0.094, 0.039 and 0.033, respectively. Maternal effects were considerable portion of variation for early growth traits of both breeds. All correlations were positive and significant (P<0.01). The genetic corrletions were extermely high, being 0.993, 0.991 and 1.000 between BW and WW, between BW and ADG and between WW and ADG of Barki lambs, respectively. The corresponding values for Rahmani lambs were 0.685, 0.677 and 1.000. The maternal genetic correlations were high to extremely high being of 0.775, 0.753 and 0.999 between BW and WW, between BW and ADG and between WW and ADG of Barki lambs, respectively. The respective values for Rahmani lambs were 0.984, 0.988 and 1.000, respectively. The maternal permanent environmental correlations among growth traits of both breeds were extremely high ranged from 0.926 to 0.997. The phenotypic correlations were moderate since they varied from 0.395 to 0.479 between BW and each of WW and ADG of both breeds, and were extremely high being 0.994 and 0.996 between WW and ADG of Barki and Rahmani lambs, respectively. High and positive genetic correlations among lamb's growth traits of both breeds showed that improvement of one trait by selection would cause positive progress in the others. The breeding values for BW, WW and ADG of Barki rams ranged between-0.227 and 0.333 kg, between-1.666 and 2.444 kg and between-11.60 and 17.00 g, respectively. The corresponding values for Rahmani rams were between-0.475 and 0.241 kg, between-3.995 and 2.983 kg and between-27.21 and 20.57g. The genetic trends estimated by the regression of rams breeding values on time were positive but not significant for all traits of both breeds except for BW of Rahmani lambs which was significant (P<0.05). The results in general showed the need for designing an effective selection programme to improve growth traits of lambs of both breeds.
2012
Data were on 333 and 187 birth and weaning, lambs born in the University of Jordan Agriculture Research Station at Dear-Alla, Jordan, respectively. The objective was to compare body weight and dimensions at birth and weaning among Awassi and Chios breeds and their crosses. Measurements taken were birth and weaning weights, heart girth, body length, wither, front leg, hip, and rear leg heights, shoulder and hip widths, tail length, width and circumference. Singles were significantly (P< 0.001) weigh more than twins at birth (4.6 vs. 3.8 kg), weaning (19.4 vs. 17.4 kg) and (P<0.05) daily gain more (201 vs. 184 g). The effects of sex and dam breed on birth weight were also significant (P<0.01). Birth type had significant (P<0.001) influence on all body dimensions at birth including heart girth, body length, wither, front leg, hip, and rear leg heights, shoulder and hip widths with singles having higher values than that for twins. Dam breed significantly affected heart girth...
Malaysian Journal of Animal Science, 2014
Hamari (n=20) and Kabashi (n=20) tribal subtype male lambs were used for a study to evaluate the pre-weaning period (4 months) growth performance and body measurements. These parameters were measured soon after birth and every two weeks thereafter. No significant differences (P>0.05) were found in birth weight and body measurements at birth, with the exception of head length between the two subtypes (18.40 vs 19.13 cm for Hamari and Kabashi lambs, respectively). Kabashi lambs had relatively higher birth weight (4.49 vs 4.38 kg), height at withers and heart girth but their heads were significantly longer (19.13 vs 18.40 cm, P<0.05). Hamari lambs were higher for the length of body, ear, neck and tail. Subtype had no significant effect on body weight during the pre-weaning period but Hamari lambs showed higher growth rates during the first two month of age and slight increase in total weight gain (19.95 vs 19.76 kg) and weaning weight (24.33 vs 24.25 kg). All lambs recorded increased body measurements with increasing age and Hamari sheep had higher values for most of the investigated traits than Kabashi sheep. Positive correlations were found between age of lambs, body measurement and body weight. The later parameter was positively correlated with most of the body measurements especially height at weathers. Significant (P<0.05) regression coefficients were recorded between age, body measurements and body weights in the two animal groups.
Interrelation between body weights of sire, dam and their lambs at early stage of growth
Biotehnologija u stocarstvu, 2020
Records of female lambs and their parents of the Mis sheep breed have used. All animals are approximately have weaned at 90 days of age. Descriptive statistics, paired sample test, paired differences, measures of association, correlations and regression of body weights between female lambs and their parents have done. A complementary least body weights at 30 days and weaning between dams and lambs but utmost weight at 30 days, the lambs were higher while at weaning, the dams had higher weight. It can observe that the averages on body weights the rams were the highest, followed by lambs and the lowest the dams? body weights. The coefficient of determination of R2 varies from low to high, indicating that the lamb's body weight has more influenced by other factors that we have not considered. There were significant correlations between lamb body weight at birth and sire/dam body weight at birth. The results showed highly significant correlations of lamb's body weight at 30 days...
The increase in birth rate is one of the most important objectives in sheep breeding. One way to increase the birth rate and yield is to hybrid the weak native breeds with those of strong from the view point. To this aim, the study has investigated the effects of sex and weaning age on the first-generation lambs growth result according to ½Romanov and Zel. Also it has used the completely randomized factorial experiments with 6 treatment and 4 replication. The lambs weaning age has been 40, 50 and 75 days. The experimental diets have been the same to the all treatments in terms of energy, protein and other nutrients. The feed intake given to lambs has been measured and weighed with interval specification. By evaluating the feed consumption results and daily weighing, in 2 first weeks, as well as fourth and fifth weeks, there were significant differences have been observed in sex and weaning age (p<0.05). In the fourth 2 weeks, a significant statistical difference has observed in the feed conversion ratio (p<0.05). By result investigation, it has been observed that the male lambs have had better performances than the females in the term of feed consumption, feed conversion ratio and daily weight gaining during the experiment weeks. The lambs of 75 days have had the best performance in feed consumption and daily weight gain.
Pre-Weaning Growth Performances and Survival Rate of Lambs' in the highlands of Ethiopia
Data collected on 1388 Awassi x Menz 25-50% 1 (AM 25-50%), 80 Awassi x Menz 75% (AM 2 75%) cross breed and 3482 Menz (M 3 ) lambs collected from 1993 through 2004 were analyzed for survival and growth from birth to weaning (90 days) at Sheno Agricultural Research Center. AM 25-50% and AM cross breed lambs were significantly (p<0.0001) heavier at birth and weaning: they also grew faster than the local M lambs. Birth weight increased with increasing blood level of Awassi; AM 75% being the heaviest. Indigenous M breed lambs were 19 and 33% lighter at birth compared to the AM 25-50% and AM 75% lambs. Year and season of Birth had significant (p<0.0001) on lamb weight at birth and weaning and pre-weaning weaning weight. Ewe lambing in the main rainy season produced the heaviest birth weight while lambing of short rainy season hand both the highest weaning weight and pre-weaning weight gain (p<0.0001). Birth weight was lowest for parity one, and subsequently increased at parity two through five. Twin born lambs were significantly (p<0.0001) lighter than single born lambs at birth and weaning; 30 and 24% at birth and weaning, respectively. Lambs born from supplemented ewes were significantly (p<0.0001) heavier at birth and weaning and also a gain advantage of 36% was recorded. Lambs born from heavier (>=46 kg) ewes were significantly (p<0.0001) heaver at birth and weaning than lamb born from lighter ewes (<=25.50 kg). The overall mortality rate was 17.49%. However, a significantly higher proportion of lambs died within three days; 46.26% Vs 11.39% at 60-90 days of age. Lambs that were born under 2.5 kg had greater risk of dying (33%) while lambs that were born above 3.5 kg died only 6.63%. Almost similar proportion (17% for M, 19% for AM 25-50% and 14% for AM 75%) lambs died, respectively. Pre-weaning survival rate of lambs were 78, 84, 80 and 86% for main rain, cold dry, dry and short rainy seasons, respectively. Improving birth weight of lambs, cross breeding of Menz local sheep with improved Awassi breed and adjusting lambing in the short rainy season could enable to produce better lambs in terms of birth weight, pre-weaning growth and pre-weaning survival of lambs in the highlands of Ethiopia.