Effect on production records of sex of lamb, twinning, and dam's age in a grassland flock

1962 ◽  
Vol 4 (3) ◽  
pp. 369-377 ◽  
Author(s):  
H. P. Donald
Keyword(s):  
Birth Weight ◽  
Correction Factors ◽  
Weaning Weight

The effects of sex, twinning and age of ewe on birth weight, weaning weight and fertility have been studied in 5 years' records of a small grassland flock of Wiltshire × Blackface crossbred ewes with the object of providing provisional correction factors for these variables in recorded flocks under similar management. All these variables produced large effects in the flock studied. On birth weight these were; sex, 0·6 lb.; twinning, 2·1 lb.; hogg's lamb, 2·3 lb. The corresponding adjustments for weaning weight were 7 lb., 14 lb., and 11 lb. Ewes first bred as hoggs subsequently performed well.

Weaning Weight Correction Factors from Angus Field Data

1978 ◽  
Vol 47 (1) ◽  
pp. 124-130 ◽  
Author(s):  
J. H. Anderson ◽  
R. L. Wilham
Keyword(s):  
Field Data ◽  
Correction Factors ◽  
Weaning Weight ◽  
Weight Correction

Effects of sex and some environmental factors on weaning weight in sheep

1976 ◽  
Vol 16 (78) ◽  
pp. 19 ◽  
Author(s):  
KP Ransom ◽  
PD Mullaney
Keyword(s):  
Environmental Factors ◽  
Regression Coefficients ◽  
Correction Factors ◽  
Weaning Weight ◽  
Efficient Selection

The effects of age at weaning, type of birth and rearing, age of dam and sex on weaning weight of lambs were investigated among 4876 Merino and 1221 Poll Dorset lambs over two years on 11 properties in Victoria. The regression coefficients of weaning weight on age at weaning varied considerably between properties. Lambs born and reared as twins were about 15 per cent lighter at weaning than single lambs, and lambs born as twins and reared as singles had about half the handicap. The average weaning weight of lambs increased with age of ewe up till five years and declined thereafter. Corrections to weaning weight for these effects are required for efficient selection. These corrections vary between years and properties. In most flocks there are inadequate numbers of sheep to determine accurate correction factors for each property each year and so standard corrections must be used.

scholarly journals The effects of breed, sire and environmental factors on the birth and weaning weight of lambs

2020 ◽  
Vol 108 (4) ◽  
pp. 70-78
Author(s):  
S. Kramarenko ◽  
◽  
A. Kramarenko ◽  
S. Lugovoy ◽  
D. Balan ◽  
...  
Keyword(s):  
Birth Weight ◽  
Environmental Factors ◽  
Litter Size ◽  
Analysis Of Variance ◽  
Significant Influence ◽  
Research Data ◽  
Weaning Weight ◽  
Factors Influencing ◽  
Size Type

The effects of breed, sire and environmental factors on the birth and weaning weight of lambs The aim of this study was to determine the effect of some important factors influencing on the birth and weaning weight variability in lambs. Data from 2603 ewes was included in the analysis, where 3961 lambs were obtained during the five years of the research. Data was tested using analysis of variance (ANOVA) with the GLM procedure of Minitab Release 13.1. Our results presented significant influence on the year of lambing, breed, ram genotype, age of a dam, type of a birth (litter size), sex of a lamb and on the birth weight and weaning weight of lambs. Keywords: birth and weaning weight of lambs; ram genotype; year of lambing; age of ewes; litter size (type of birth); sex of a lamb; the Ascanian fine-fleece breed.

scholarly journals Evaluación fenotípica y genética para características de crecimiento en la raza criolla colombiana Costeño con Cuernos

2007 ◽  
Vol 7 (2) ◽  
pp. 12 ◽  
Author(s):  
Rodrigo Alfredo Martínez ◽  
Juan Esteban Pérez ◽  
Teófilo Herazo
Keyword(s):  
Birth Weight ◽  
Variance Components ◽  
Fixed Effects ◽  
Genetic Parameters ◽  
Growth Traits ◽  
Phenotypic Correlation ◽  
Phenotypic Variance ◽  
Direct Effects ◽  
Weaning Weight ◽  
Number Of Births

<p>Se establecieron componentes de varianza, así como parámetros fenotípicos y genéticos, respecto de las variables ‘peso al nacimiento’, ‘peso al destete’ (ajustado a los 270 días) y ‘peso a los 480 días’ en un hato del ganado criollo colombiano Costeño con Cuernos. Se analizaron 2.281 registros de pesos al nacer, 1.722 de pesos al destete  y 1.086 de pesos ajustados a los 480 días utilizando la metodología de máxima verosimilitud restringida (DFREML). También se ajustó un modelo animal que incluyó efectos genéticos directos, maternos y de ambiente permanente, asumiendo como efectos fijos el año de nacimiento, el sexo del ternero y el número de partos de la madre; finalmente, se estimaron los parámetros genéticos ‘heredabilidad’, ‘repetibilildad’ y se establecieron correlaciones genéticas y fenotípicas. Se reportan bajas estimaciones de heredabilidad de los efectos directos, que varían entre 0,17 ± 0,001 y 0,21 ± 0,074 para los pesos al nacer y al destete, respectivamente; así mismo, fue baja la heredabilidad de los efectos genéticos maternos con relación al peso al nacimiento, aunque estos estimados aumentaron respecto de los pesos al nacer y al destete. Las correlaciones entre efectos directos y maternos fueron negativas, pero el mayor valor se encontró para el peso al nacimiento (-0,89). La contribución del ambiente permanente como proporción de la varianza fenotípica total fue baja y disminuyó a medida que aumentó la edad del animal.</p><p> </p><p><strong>Genetic and phenotypic evaluation to characterize growth traits of the native Colombian breed Costeño con Cuernos</strong></p><p>For a herd of native Colombian breed of cattle -Costeño con Cuernos (CCC)- estimates of variance components for phenotypic and genetic parameters were obtained for birth weight, weight at weaning (adjusted to 270 days) and weight at 480 days. Using the restricted maximum likelihood (REMI) methodology, 2281 birth weight records (PN), 1722 weaning weight records and 1086 weight records adjusted to 480 days were analyze by fitting a model which included direct and maternal genetics effects as well as permanent environmental effects, assuming that fixed effects were year of birth weight, calf gender and the mother number of births. The genetic parameters for heritability, repeatability, genetic and phenotypic correlation were estimated and genotypic and phenotypic correlation was established. Heritability estimates for direct effects are low and range from 0.17 ± 0.001 and 0.21 ± 0.074 for birth and weaning weight respectively; while estimates for maternal genetics effects were also low for PN, they were higher for weaning weight and weight at 480 days. There was a negative correlation between direct and maternal effects, and the higher value was for PN (-0.89). The contribution of the variable permanent environment measured as the contribution of the phenotypic variance was low and diminished as animal age increased.</p>

scholarly journals PSVII-9 Evaluating Performance Trends of the Four Most Represented Breeds of Bulls in the Utah Beef Improvement Performance Test

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 304-304
Author(s):  
Matthew D Garcia ◽  
Madelyn Kunzler ◽  
Kim Chapman
Keyword(s):  
Birth Weight ◽  
Average Daily Gain ◽  
Rate Of Change ◽  
Test Weight ◽  
Initial Test ◽  
Final Test ◽  
Weaning Weight ◽  
Increasing Trend ◽  
Red Angus ◽  
Daily Gain

Abstract This study evaluated changes in performance of bulls enrolled in the Utah Beef Improvement Association’s (UBIA) annual performance tests conducted in accordance with central bull test standards established by the Beef Improvement Federation. Breeds with over 500 bulls enrolled over the period of 2004 to 2018 were included in the evaluation. The breeds with greater than 500 animals evaluated included the Angus, Red Angus, Hereford and Simmental Breeds. Traits evaluated included birth weight, initial weight, a 205-day adjusted weaning weight, final test weight, average daily gain, adjusted yearling weight, and weight per day of age. The mixed model procedure of SAS and interval regression analyses were utilized to evaluate the yearly rate of change for each breed and to determine if that rate of change was significantly different (P &lt; 0.05) between the evaluated breeds. When evaluating all breeds represented across years, significant differences (P &lt; 0.05) were observed for rate of change when evaluating birth weight and 205-day adjusted weaning weight. However, no differences were observed between breeds with more than 500 animals represented. Significant differences (P &lt; 0.05) for rate of change were observed when comparing the top four represented breeds, for average daily gain, initial test weight, final test weight, adjusted yearling weight and weight per day of age. Specifically, a declining trend was noted for all breeds when evaluation all significant traits. When evaluating the previously described traits, the Angus breed was significantly different in its rate of decline when compared to the Red Angus and Hereford breeds. The lone increasing trend was observed in the Hereford breed which had a positive increasing trend for initial test weight which was significantly different (P &lt; 0.05) from both the Angus and Red Angus breeds but not significantly different from the Simmental breed.

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.

scholarly journals The Comparison of Milk and Reproductive Performance of Saanen and Saanen × Hair Goat Crossbreds (F1, B1 & B2) and Growth Performance of their Kids in Semi-Intensive Production System

2019 ◽  
Vol 7 (6) ◽  
pp. 871
Author(s):  
Mesut Yıldırır ◽  
Orhan Karadağ ◽  
Mustafa Yilmaz ◽  
Mehmet Akif Yüksel ◽  
Tamer Sezenler ◽  
...  
Keyword(s):  
Birth Weight ◽  
Growth Performance ◽  
Milk Yield ◽  
Reproductive Performance ◽  
Production System ◽  
Dry Matter ◽  
Live Weight ◽  
Dry Matter Content ◽  
Weaning Weight ◽  
Intensive Production

The aims of this study were to evaluate the traits of reproductive, milking and growth performance of Saanen and Saanen × Hair crossbreds (F1, B1 and B2) raised at the Bandırma Sheep Research Institute. The data were collected from 868 goats for reproductive performance and milk yield and from 1077 kids for survival performance between 2009-2012. Milk components (fat, protein, lactose and non-fat dry matter) of goats (n=162) and body weight changes of kid’s (n=64) were evaluated for one year in 2012. Estrus rates and survival rates were similar among all genotypes. Kidding rate was significantly higher in F1 goats than Saanen goats. Saanen goat had the lowest average mean daily milk yield compared with other genotypes. The effect of year and age were significant on milk yield. Goats in F1 and B1 genotypes had higher milk protein percentage and non-fat dry matter content in comparison with Saanen and B2 genotype. Milk fat and lactose contents were similar among genotypes. Birth weight and monthly live weight were similar between genotypes while weaning weight, six month live weight and yearling live weight were higher in B1 kids in comparison with Saanen kids. The effect of dam age and birth type were significant on birth weight, monthly live weight and weaning weight. The findings related to performance characteristics in goat genotypes investigated show that B1 genotype could be recommend for semi-intensive production system in the Western Anatolia.

Study on Influence of Environmental Effect on Birth Weight, Weaning Weight and Daily Growth of Baluchi Sheep

2007 ◽  
Vol 6 (5) ◽  
pp. 436-437 ◽  
Author(s):  
D.A. Saghi ◽  
H. Khadivi ◽  
M. Navidzadeh ◽  
M. Nikbakhti
Keyword(s):  
Birth Weight ◽  
Environmental Effect ◽  
Daily Growth ◽  
Weaning Weight

scholarly journals Factors affecting growth traits of beef cattle breeds raised inSlovakia

2011 ◽  
Vol 50 (No. 1) ◽  
pp. 14-21 ◽  
Author(s):  
E. Krupa ◽  
M. Oravcová ◽  
P. Polák ◽  
J. Huba ◽  
Z. Krupová
Keyword(s):  
Birth Weight ◽  
Beef Cattle ◽  
Least Squares ◽  
Linear Model ◽  
Growth Traits ◽  
General Linear Model ◽  
Weaning Weight ◽  
Factors Affecting ◽  
Sex Effect ◽  
Beef Cattle Breeds

Growth traits of purebred calves of six beef breeds (Aberdeen Angus &ndash; AA, Blonde d&rsquo;Aquitaine &ndash; BA, Charolais &ndash; CH,Hereford &ndash; HE, Limousine &ndash; LI and Beef Simmental &ndash; BS) born from 1998 to 2002 were analysed. Traits under study were birth weight (BW), weight at 120 days (W120), weight at 210 days &ndash; weaning weight (WW), weight at 365 days &ndash; yearling weight (YW) and average daily gains from birth to 120 days (ADG1), from birth to 210 days (ADG2), from birth to 365 days (ADG3), from 120 to 210 days (ADG4). General linear model with class effects of breed, dam&rsquo;s age at calving, sex, herd-year-season (HYS) and covariation of age at weighing was used for analyses. All effects significantly affected both weight and gain traits except for dam&rsquo;s age that was significant for BW, W120, YW and ADG3, and age at weighing that was significant for W120, WW, YW, ADG2, ADG3, ADG4. Estimated least squares means of growth traits were compared using Scheffe&rsquo;s multiple-range tests. Highest BW (40.57&nbsp;kg) and W120 (172.43 kg) were found for BA calves. BS calves had highest WW (260.30 kg), YW (424.07 kg), ADG1 (1&nbsp;154&nbsp;g), ADG2 (1 053 g), ADG3 (1 054 g) and ADG4 (1 098 g). Highest BW, YW, ADG3 and ADG4 were found for males-singles. Males-twins had highest W120, WW, ADG1 and ADG2. Calves descending from 5&ndash;7 years old dams had highest BW, W120, WW, ADG1, ADG2 and ADG4. The proportion of variability of growth traits explained by HYS effect (42.96&ndash;71.69%) was high, whereas proportions of variability explained by SEX effect (2.03&ndash;5.77%), age of dam (1.02&ndash;2.24%) and breed (1.05&ndash;2.21%) were low. Residuals accounted for 23.71 up to 53.79% of total variance. &nbsp;

scholarly journals PSXI-5 Effect of increasing feed intake during late gestation on piglet birth weight and weaning weight of low backfat thickness sows

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 387-388
Author(s):  
Yuanfei Zhou ◽  
Zuhong Liu ◽  
Jian Peng
Keyword(s):  
Birth Weight ◽  
Feed Intake ◽  
Energy Requirement ◽  
Body Weight Loss ◽  
Late Gestation ◽  
Backfat Thickness ◽  
Large White ◽  
Weaning Weight ◽  
Weight Variation ◽  
High Feed

Abstract This study investigated the effect of feed intake during late gestation on piglet birth weight and weaning weight of sows with the low backfat thickness (BF) at gestation 90 d. A total of 397 crossbred Landrance × Large White sows according to feed intakes were randomly allotted to three groups 2.8 kg/d (the energy requirement for sow maintenance), 3.6 kg/d and 4.0 kg/d from day 90 to day 110 of gestation. Sows were weighed and measured BF at 90 d and at 110 d of gestation and at weaning. Piglet performance at parturition and at weaning and wean-to-estrus of sows were recorded. Although sows had a tendency to increase BF at gestation 110 d (P = 0.09) and had more BF gain during late gestation with higher feed intake (P &lt; 0.01), there was no evidence for differences in piglet birth weight, within-litter birth weight variation and weak piglet rate, and the number of total born, born alive and stillborn. During lactation, sows fed with high feed intake in late gestation increased body weight loss (P &lt; 0.01). And no differences were observed in piglet performance at weaning and wean-to-estrus interval of sows. In conclusion, during late gestation, sows fed with feed intake more than energy requirement for maintenance had no effect on piglet birth weight or weaning weight.

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