scholarly journals COMPARISON OF SCALE WEIGHTS TO TAPE ESTIMATES AND THEIR RELATIONSHIPS WITH CONDITION SCORES IN BUNAJI CATTLE

2021 ◽  
Vol 18 ◽  
pp. 78-81
Author(s):  
R. I. MANI ◽  
A. R. ABDULLAHI ◽  
R. VON KAUFMANN.
Keyword(s):  
Measurement Method ◽  
Field Conditions ◽  
Regression Coefficients ◽  
Measurement Scale ◽  
Correction Factors ◽  
Indirect Methods ◽  
Weight Condition ◽  
Condition Score ◽  
The Relationship ◽  
Tape Measurement

Animal weighing facilities are not available in many African farming conditions. Indirect methods of estimating animals weights have been compared with scale weights and, in some cases. condition scores. The use of calibrated weigh bands is not widely practised probably because calibrations were based on temperate breeds. A study was carried out to determine the relationship between scale, tape measurement and weighband estimates of Bunaji cattle. These were then related to the animals' condition scores. Both the tape measurement and management and research purposes. When weigh band weights significantly (P<0.001) correlated (r = 0.95 and 0.94 respectively) with the  scale weight. Condition score significantly is (P<0.001) correlated with the tape meaşurement, scale and weighband weights (r = 0.62, 0.67 and 0.64 respectively). The correction factors of the regression coefficients of determining weight from condition score for the three methods varied by only 3.92. It is suggested breed. that in the absence of weighing facilities, reliable estimates can be obtained by either tape measurement or weighband methods. Condition score can also reliably be used to estimate the weight using the regression coefficients obtained. Weighbands will be easier to use in field conditions. The need to calculate the weight from a formula could introduce errors when using the tape measurement method. 

Estimation of the mature weight of three breeds of Greek sheep using condition scoring corrected for the effect of age

1997 ◽  
Vol 64 (1) ◽  
pp. 147-153 ◽  
Author(s):  
D. Zygoyiannis ◽  
C. Stamataris ◽  
N. C. Friggens ◽  
J. M. Doney ◽  
G. C. Emmans
Keyword(s):  
Standard Condition ◽  
Live Weight ◽  
Regression Coefficients ◽  
Point Scale ◽  
Wide Range ◽  
Condition Score ◽  
Mature Weight ◽  
The Relationship ◽  
Single Regression ◽  
Effect Of Age

AbstractThe objective of this study was to evaluate the influences of age and condition score on the live weight of ewes of three Greek dairy breeds. Boutsko (no. = 225), Serres (no. = 292) and Karagouniko (no. = 301) ewes from individually recorded purebred flocks were weighed (±0·5 kg) and condition scored, on a six-point scale, to the nearest 0·5 unit. Within each breed and age group the relationship between live weight and condition score was derived by linear regression. There was a highly significant relationship between condition score and live weight in all of the groups (P < 0·01). Live weight, adjusted to a standard condition score, increased with increasing age up to 3·5 years; beyond this age there was no effect of age on condition score. The live weight and condition score data for ages 3·5 years and upwards were used to derive a single regression between live weight and condition score for each breed. This provides a means to estimate adult live weights standardized to a given condition score. The values of the regression coefficients were directly proportional to the breed mature weight; on average the increase in live weight associated with a unit of condition score was 0·129 kg/kg of mature weight for the three breeds studied. Mature weight was estimated as the weight at a condition score of 5. Using published information, a similar value was found to apply to a wide range of sheep breeds and also to cattle. This robust value permits the live-weight change associated with a unit of condition score to be calculated, for any breed.

scholarly journals A Study on Relationship between Body Condition Score (BCS) and Milk Yield, Fat and Solids-Not-Fat Percent in Murrah Graded Buffaloes under Field Conditions

2021 ◽  
Vol 8 (8) ◽  
pp. 33-41
Author(s):  
Ranjitha. B ◽  
Ashalatha. P ◽  
Jagadeeswara Rao. S ◽  
Subrahmanyeswari. B
Keyword(s):  
Milk Yield ◽  
Body Condition ◽  
Body Condition Score ◽  
Field Conditions ◽  
High Positive Correlation ◽  
Condition Score ◽  
Commercial Farms ◽  
The Mean ◽  
Relationship Of ◽  
The Relationship

The present experiment was a study on the relationship of Body Condition Score with milk yield, fat and solids-not-fat percent in murrah graded buffaloes under field conditions. In this murrah graded buffaloes from different commercial farms of Guntur and Krishna districts were selected. Total of 150 murrah graded buffaloes of different parities (1st to 6th parities) were selected. Various parameters like BCS, related to average milk yield, fat per cent, SNF per cent was taken into consideration for the present study and a correlated study of BCS and the milk yield was studied. The selected animals were divided into four groups based on BCS as 2.5-2.99, 3.0-3.49, 3.5-3.99, 4.0-4.49. The mean BCS values of 2.5-2.99, 3.0-3.49, 3.5-3.99, 4.0-4.49 were 2.62, 3.25, 3.56 and 4.25 respectively. Highest milk yield was recorded in second month of lactation and lowest in first month of lactation with 9.445±0.15 and 6.18±0.08 kg per day, respectively. The buffaloes with BCS 4.0-4.49 yielded higher milk yield when compared to other groups. Highest fat and SNF percent was observed in the animals with BCS 4.0-4.49 when compared with others. The BCS had showed high positive correlation with SNF (0.44) and milk yield (0.41).

scholarly journals Quinoa for the Brazilian Cerrado: Agronomic Characteristics of Elite Genotypes under Different Water Regimes

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1591
Author(s):  
Patrícia Carvalho da Silva ◽  
Walter Quadros Ribeiro Junior ◽  
Maria Lucrecia Gerosa Ramos ◽  
Sonia Maria Costa Celestino ◽  
Alberto do Nascimento Silva ◽  
...  
Keyword(s):  
Grain Quality ◽  
Winter Season ◽  
Field Conditions ◽  
Water Restriction ◽  
Water Regimes ◽  
Agronomic Characteristics ◽  
Relative Water ◽  
Different Seasons ◽  
The Relationship

Quinoa stands out as an excellent crop in the Cerrado region for cultivation in the off-season or irrigated winter season. Here, we tested the effects of different water regimes on the agronomic characteristics, physiology, and grain quality of different elite quinoa genotypes under field conditions. The experiment was conducted under field conditions at Embrapa Cerrados (Planaltina, DF, Brazil). The experimental design was in randomized blocks, in a split-plot scheme, with four replications. The plots were composed of 18 quinoa genotypes and modified BRS Piabiru (the currently used genotype), and the split-plots were divided into 4 different water regimes. The following variables were evaluated: productivity and productivity per unit of applied water (PUAA), plant height, flavonoids, anthocyanins, gas exchange, chlorophyll, leaf proline, and relative water content. Our results showed that water regimes between 309 and 389 mm can be recommended for quinoa in the Cerrado region. CPAC6 and CPAC13 presented the highest yield and PUAA under high and intermediate WRs, and hence were the most suitable for winter growth under irrigation. CPAC17 is most suitable for off-season growth under rainfed conditions, as it presented the highest PUAA under the low WRs (247 and 150). CPAC9 stood out in terms of accumulation of flavonoids and anthocyanins in all WRs. Physiological analyses revealed different responses of the genotypes to water restriction, together with symptoms of stress under lower water regimes. Our study reinforces the importance of detailed analyses of the relationship between productivity, physiology, and water use when choosing genotypes for planting and harvest in different seasons.

scholarly journals Association of body condition with lameness in dairy cattle: a single-farm longitudinal study

2021 ◽  
pp. 1-4
Author(s):  
Michaela Kranepuhl ◽  
Detlef May ◽  
Edna Hillmann ◽  
Lorenz Gygax
Keyword(s):  
Body Condition ◽  
Body Condition Score ◽  
Mixed Effects ◽  
Mixed Effects Models ◽  
Linear Mixed Effects Models ◽  
Linear Mixed Effects ◽  
Confounding Variables ◽  
Condition Score ◽  
The Impact ◽  
The Relationship

Abstract This research communication describes the relationship between the occurrence of lameness and body condition score (BCS) in a sample of 288 cows from a single farm that were repeatedly scored in the course of 9 months while controlling for confounding variables. The relationship between BCS and lameness was evaluated using generalised linear mixed-effects models. It was found that the proportion of lame cows was higher with decreasing but also with increasing BCS, increased with lactation number and decreased with time since the last claw trimming. This is likely to reflect the importance of sufficient body condition in the prevention of lameness but also raises the question of the impact of overcondition on lameness and the influence of claw trimming events on the assessment of lameness. A stronger focus on BCS might allow improved management of lameness that is still one of the major problems in housed cows.

scholarly journals BREED AND SEX EFFECTS ON THE RELATIONSHIP BETWEEN WEIGHT AND FATNESS IN LACOMBE AND YORKSHIRE SWINE AND THEIR RECIPROCAL CROSSES

1965 ◽  
Vol 45 (1) ◽  
pp. 33-36
Author(s):  
G. W. Rahnefeld
Keyword(s):  
Body Weight ◽  
Sex Differences ◽  
Regression Coefficients ◽  
Average Depth ◽  
Constant Weight ◽  
Reciprocal Crosses ◽  
Sex Effects ◽  
Female Mating ◽  
The Mean ◽  
The Relationship

The relationship between thickness of fat measured at the shoulder, last rib, and loin of live pigs and market weight (86.2 to 95.2 kg) was studied in 1596 pigs from the Lacombe and Yorkshire breeds and their reciprocal crosses. No significant breed or sex differences were found in the proportion of fat at the three sites. Breed and sex differences were evident in the average depth of fat. The regression coefficients for the mean of three fat measurements on market weight were.016 ±.003,.019 ±.007, and.017 ±.004 for Lacombe males, barrows, and females respectively;.039 ±.002,.036 ±.005, and.041 ±.001 for Yorkshire males, barrows and females respectively;.027 ±.005 and.029 ±.004 for barrows and females from the Lacombe male × Yorkshire female mating; and.023 ±.007 and.021 ±.009 for barrows and females from the Yorkshire male × Lacombe female mating. Comparisons between animals measured at a relatively constant weight should be made after the fat measurement is adjusted for variations in body weight. The results of this study indicate that separate corrections should be applied for each breed. Separate corrections for sexes within breeds do not appear warranted.

scholarly journals Conditional and marginal relative risk parameters for a class of recursive regression graph models

2018 ◽  
Vol 28 (10-11) ◽  
pp. 3466-3486
Author(s):  
Monia Lupparelli
Keyword(s):  
Relative Risk ◽  
Binary Data ◽  
Oral Morphine ◽  
Regression Coefficients ◽  
Relative Risks ◽  
Morphine Administration ◽  
Gaussian Case ◽  
Regression Graph ◽  
Risk Parameters ◽  
The Relationship

In linear regression modelling, the distortion of effects after marginalizing over variables of the conditioning set has been widely studied in several contexts. For Gaussian variables, the relationship between marginal and partial regression coefficients is well established and the issue is often addressed as a result of W. G. Cochran. Possible generalizations beyond the linear Gaussian case have been developed, nevertheless the case of discrete variables is still challenging, in particular in medical and social science settings. A multivariate regression framework is proposed for binary data with regression coefficients given by the logarithm of relative risks, and a multivariate Relative Risk formula is derived to define the relationship between marginal and conditional relative risks. The method is illustrated through the analysis of the morphine data in order to assess the effect of preoperative oral morphine administration on the postoperative pain relief.

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.

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