The small East African shorthorn zebu cows in Kenya. I: Linear body measurements

Mwacharo, J. M.; Okeyo, A.M.; Kamande, G. K.; Rege, J.E.O.

doi:10.1007/s11250-006-4266-y

Cited by 80 publications

(64 citation statements)

References 14 publications

(22 reference statements)

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“…Among the linear type traits, the highest correlation was observed between WH and RH (r =0.98) while the lowest estimate (r =0.51) was recorded for RH and SW. Similar findings have been reported [10,12,24]. The strong relationship existing between BW and body measurements suggests that either or combination of these morphological traits could be used to estimate live weight in cattle fairly well in the situation where weighbridges or scales are not available.…”

Section: Pairwise Correlationssupporting

confidence: 86%

Fixing Multicollinearity Instability in the Prediction of Body Weight From Morphometric Traits of White Fulani Cows

Yakubu¹

2010

JCEA

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Body weight and nine morphostructural characters (withers height, rump height, heart girth, body length, head width, cannon circumference, shoulder width, rump width and rump length) of 83 White Fulani cows aged 1.5-2.4 years old were used to study the problem of multicollinearity instability in the estimation of body weight from morphological indices. Pairwise phenotypic correlations indicated a high and positive significant relationship between body weight and body dimensions (r = 0.61-0.94; P<0.01). Among the linear type traits, the highest correlation was observed between withers height and rump height (r =0.98) while the lowest value was recorded for rump height and shoulder width (r =0.51). Severe collinearity problems were evident in 5 of the zoometrical variables as portrayed by variance inflation factors (VIFs) higher than 10.00 (VIF = 33.096, 31.421, 24.612, 22.726 and 13.327 for rump height, withers height, rump length, heart girth and body length respectively). Collinearity problems were further confirmed from the computations of the eigenvalues of the correlation matrix, condition indexes and variance proportions. Heart girth was retained among the collinear variables, and singly accounted for 87.9%, 92.3% and 94.1% of the variation in body weight in the subsequent stepwise regression, quadratic and cubic models, respectively.

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Section: Pairwise Correlationssupporting

confidence: 86%

Fixing Multicollinearity Instability in the Prediction of Body Weight From Morphometric Traits of White Fulani Cows

Yakubu¹

2010

JCEA

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“…The calculation of the correlation coefficients showed that live weight was highly correlated with HG compared to other measurements, which clearly indicated that HG is the most reliable measurement for prediction of live weight of Brahman crossbred cattle. This is in agreement with the findings of other studies which reported high correlation coefficient between live weight and heart girth measurement (Msangi et al, 1999;Malau-Aduli et al, 2004;Nwacharo et al, 2006;Abdelhadi and Babiker, 2009;Yakubu, 2010). The strong relationship found between BW and body measurements in this study suggests that either or combination of these morphological traits could be used to estimate live weight in cattle fairly well in the situation where weighbridges or scales are not available.…”

Section: Discussionsupporting

confidence: 93%

Morphometric characterization of Brahman crossbred cattle and prediction of live weight using linear body measurements

Rashid

Hoque

Huque

et al. 2016

Asian J. Med. Biol. Res

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The present work was conducted to evaluate the variability in linear body measurements; to investigate the relationship between body linear measurements and live weight and to predict live weight of F 1 Brahman crossbred cattle using body measurements. A total of 123 male and 87 female F 1 Brahman crossbred cattle of 6-36 months age and weighing from 63 to 535 kg were used for the study over a period from 2010 to 2014. The study revealed that that most of the morphological measurements were linearly increased with the advances of age. The body weight had highest correlation coefficient with the heart girth around the chest (r=0.96, p<0.001) and lowest with canon bone length (r=0.49, p<0.001) compared with other body measurements. The correlations of body weight with tail length, ear length, canon bone length and canon bone width were at medium level (r=0.51-0.79). Grouping of data according to age indicated that heart girth in >24 months group had highest correlation coefficient (r=0.96) with body weight compared to ≤12 months (r=0.92) and >12-24 months (r=0.95) group. The stepwise regression models revealed that heart girth singly accounted highest variation (93%) in body weight for all animals. Thus, the general equation for prediction of live weight of Brahman crossbred cattle was Y=4. where Y=live weight (Kg), HG=heart girth around the chest (cm). The regression equations for the live weight were Y=2. ) and Y=4.87HG-471 (23.0) for ≤12, >12-24 and >24 months age groups. The best model for estimating body weight was obtained using HG and body length (BL) for all animals Y=2.83HG+1.80BL-392 (6.69). These results suggested that prediction equations based on HG or in combination of HG and BL can be used efficiently in Brahman crossbred cattle to predict live weight.

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“…Appropriate design of breeding programmes is impossible for breeds that have not been adequately characterized either phenotypically and/or genetically (Mwacharo et al, 2006). Phenotypic characteristics are important in breed identification and classification.…”

Section: Introductionmentioning

confidence: 99%

Discriminant analysis of morphometric differentiation in the West African Dwarf and Red Sokoto goats

Yakubu¹,

Salako²,

Imumorin³

et al. 2011

SA J. An. Sci.

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This study evaluated the usefulness of morphological characteristics to distinguish two important indigenous goat breeds in Nigeria. Fifteen morphometric traits were measured on West African Dwarf -WAD (n = 160) and Red Sokoto -RS (n = 142) goats that ranged in age of up to 19 months and were reared extensively in villages in southern and northern Nigeria. Univariate analysis revealed that the body measures of RS goats were significantly higher than those of WAD goats. Canonical discriminant analysis gave better resolution, as only seven external morphological characteristics of strong discriminating power were extracted. The most discriminant variable between the two goat populations was rump height, followed in order by body length, horn length, face length, chest girth, neck circumference and head width. The discriminant function obtained correctly classified 100% of individuals from the sample of known goat populations. The classification accuracy of the function was cross-validated using the split-sample method, and indicated a 99.7% success rate (99.4% of WAD goats and 100% of RS goats were correctly assigned to their source genetic group). This study indicates that a discriminant tool may be used successfully in the field to separate WAD and RS goats. The present results could be complemented by molecular characterization using DNA markers for better management and conservation strategies of genetic resources for indigenous goats.

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The small East African shorthorn zebu cows in Kenya. I: Linear body measurements

Cited by 80 publications

References 14 publications

Fixing Multicollinearity Instability in the Prediction of Body Weight From Morphometric Traits of White Fulani Cows

Fixing Multicollinearity Instability in the Prediction of Body Weight From Morphometric Traits of White Fulani Cows

Morphometric characterization of Brahman crossbred cattle and prediction of live weight using linear body measurements

Discriminant analysis of morphometric differentiation in the West African Dwarf and Red Sokoto goats

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