Morphological structure of Zulu sheep based on principal component analysis of body measurements

2013 ◽  
Vol 111 (1-3) ◽  
pp. 23-30 ◽  
Author(s):  
B.S. Mavule ◽  
V. Muchenje ◽  
C.C. Bezuidenhout ◽  
N.W. Kunene
Keyword(s):  
Principal Component Analysis ◽  
Morphological Structure ◽  
Principal Component ◽  
Component Analysis ◽  
Body Measurements

scholarly journals Bayesian principal component analysis of Nigerian indigenous normal feather chickens' body linear measurements

2020 ◽  
Vol 44 (1) ◽  
pp. 10-20
Author(s):  
A. E. Sonubi ◽  
A. S. Adenaike ◽  
A. A. Dauda ◽  
T. P. Alao ◽  
B. O. Shonubi ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Body Weight ◽  
Principal Components ◽  
Body Shape ◽  
Principal Component ◽  
Component Analysis ◽  
Body Measurements ◽  
Indigenous Chicken ◽  
Body Dimension ◽  
Linear Measurements

The indigenous chicken is a store house of unique genes that could be used in other parts of the world for improving other breeds. This study was carried out using bayesian principal component analysis and aimed objectively at determining the effect of sex on Nigerian indigenous normal feather chickens' body dimension, describing their body shape, and predicting their body weights from body measurements using orthogonal conformation traits derived from the principal components score. The parameters measured at 16 weeks of age were body weight, body length, breast girth, thigh length, shank length, shank diameter, keel length, wing length, wing span, and tail length on 233 randomly selected adult chickens. Sexual dimorphism was observed in all the traits with higher values recorded for males. Bayesian correlations among body weight and biometric traits were positive (r = 0.09 to 0.651 and 0.017 to 0.579 in male and female chickens respectively). The descriptive statistics showed that the mean body weight was 1.8085 ± 0.263 kg for males and 1.403 ± 0.226 kg for females. The first two principal components (PCs) were extracted for the males, both PCs components account for 72.21%. For the females, three PCs were extracted and they account for 77%. The first PC in each case accounted for the greatest percentage of the total variation. The use of orthogonal body shape characteristics derived from components' scores was more appropriate than the use of original traits in body weight prediction as multi-collinearity problems were eliminated. This led to simultaneous analysis of these body measurements rather than on individual basis. These components could be used as selection criteria for improving body weight of indigenous Nigerian chickens.

scholarly journals Variability in size and shape in muscovy duck with age: Principal component analysis

2014 ◽  
Vol 30 (1) ◽  
pp. 125-136 ◽  
Author(s):  
D.M. Ogah ◽  
M. Kabir
Keyword(s):  
Principal Component Analysis ◽  
Principal Components ◽  
Principal Component ◽  
Component Analysis ◽  
The Body ◽  
Dependence Structure ◽  
Muscovy Duck ◽  
Body Measurements ◽  
Male And Female ◽  
Size And Shape

Body weight and six linear body measurements, body length (BL), breast circumference (BCC), thigh length (TL), shank length (SL), total leg length (TLL) and wing length were recorded on 150 male and female muscovy ducklings and evaluated at 3, 5, 10, 15 and 20 weeks of age. Principal component analysis was used to study the dependence structure among the body measurements and to quantify sex differences in morphometric size and shape variations during growth. The first principal components at each of the five ages in both sexes accounted between 71.54 to 92.95% of the variation in the seven measurements and provided a linear function of size with nearly equal emphasis on all traits. The second principal components in all cases also accounted for between 6.7 to 16.17% of the variations in the dependence structure of the system in the variables as shape, the coefficient for the PCs at various ages were sex dependent with males showing higher variability because of spontaneous increase in size and shape than females. Contribution of the general size factor to the total variance increase with age in both male and female ducklings, while shape factor tend to be stable in males and inconsistent in females.

scholarly journals Principal component analysis of the exterior traits in dairy cows

2017 ◽  
Vol 19 (79) ◽  
Author(s):  
S. Kramarenko ◽  
N. Kuzmicheva ◽  
A. Kramarenko
Keyword(s):  
Principal Component Analysis ◽  
Dairy Cows ◽  
Principal Component ◽  
Component Analysis ◽  
The Body ◽  
Chest Circumference ◽  
State Enterprise ◽  
Body Measurements ◽  
Generalized Variance ◽  
Diagonal Length

The present study was undertaken to study the relationship between different body measurements and to develop unobservable factors (latent) to define which of these measurements best represent body conformation in the dairy cows. Biometrical observations were recorded on 109 Red Steppe dairy cows randomly selected from State Enterprise «Breeding reproducer «Stepove» (Mykolayiv region, Ukraine) during the 2001–2014. Principal Component Analysis (PCA) was used to account for the maximum portion of variation present in the original set of variables (body traits in cow) with a minimum number of composite variables through STATISTICA software. Most of the pairwise phenotypic correlations among the exterior traits in dairy cows were positive and significant. The Pearson’s correlation coefficients of the body measurements ranged from 0.215 (chest depth – cannon circumference) to 0.889 (height at withers – rump height). In factor solution of the Principal Component Analysis, two (latent) which explained 48.5% of the generalized variance were extracted. The first principal component (PC1) explained general body confirmation and explained 33.5% variation. It was represented by significant positive loading for height at withers, rump height, diagonal length from point of shoulder to pin bone, chest depth, chest circumference etc.). The second principal component (PC2) accounted for an additional 15.0% of the generalized variance and was interpreted as an indicator of body shape (e.g., endomorphic vs. ectomorphic). It was represented by significant negative loadings for height at withers, rump height, diagonal length from point of shoulder to pin bone, but significant positive loadings for chest width, chest depth, chest circumference and cannon circumference. The study also revealed that factors extracted from the present investigation could be used in breeding programs of the dairy cattle.

scholarly journals Principal Component Analysis of Body Measurements of Yankassa Sheep in Anyigba, Kogi State, Nigeria

2020 ◽  
Vol 8 (2) ◽  
pp. 45
Author(s):  
Adejoh Christiana Ojonegecha ◽  
Musa Abdulraheem Arome ◽  
Okoh Joseph Joseph ◽  
Okolo Freedom Atokolo ◽  
Emmanuel Amanabo Theophilus ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Body Measurements

scholarly journals Evaluasi Ukuran-Ukuran Tubuh pada Sapi Belgian Blue, Peranakan Ongole dan Silangannya

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Aminurrahman Aminurrahman ◽  
Rudy Priyanto ◽  
Jakaria Jakaria
Keyword(s):  
Principal Component Analysis ◽  
Measurement Data ◽  
Principal Component ◽  
Component Analysis ◽  
The Body ◽  
Body Measurements ◽  
Body Measurement ◽  
Slope Length ◽  
Depth Index ◽  
Index 2

ABSTRAK. Penelitian ini bertujuan mengevaluasi dan menganalisis ukuran-ukuran tubuh pada sapi Belgian Blue, Peranakan Ongole dan silangannya. Sapi yang digunakan dalam penelitian ini sebanyak 30 ekor terdiri atas 7 ekor sapi Belgian Blue (BB), 8 ekor sapi Peranakan Ongole (PO) dan 15 ekor silangannya (BBxPO) yang dipelihara di Balai Embrio Ternak (BET) Cipelang Bogor, Indonesia. Peubah ukuran-ukuran tubuh yang diamati adalah panjang badan, tinggi pundak, dalam dada, lebar dada, lingkar dada, tinggi pinggul dan lebar pinggul, sedangkan indeksasi yang dihitung adalah weight, height slope, length index 1, length index 2, width slope, depth index dan foreleg length. Data ukuran-ukuran tubuh pada setiap bangsa sapi dikoreksi berdasarkan umur dan jenis kelamin. Selanjutnya data ukuran-ukuran tubuh dan nilai indeksasi dianalisis menggunakan analisis ragam (ANOVA) dengan program SAS 9.4. Analisis Komponen Utama (AKU) dengan pendekatan biplot dianalisis menggunakan program XLSTAT. Hasil penelitian menunjukkan bahwa ukuran-ukuran tubuh dan indeksasi pada setiap bangsa sapi berbeda (P0.05). Hasil analisis komponen utama memperlihatkan bahwa ketiga bangsa sapi yang dianalisis secara jelas terpisah baik sapi BB, PO dan silangannya. Bangsa sapi BB dan silangannya (BBPO) memiliki karakter peubah spesifik dan menjadi penciri pada setiap bangsa sapi. Dengan demikian arah seleksi dapat mengacu pada karakter yang diinginkan sebagai sapi penghasil tipe pedaging.  Evaluation of the Body Measurements on Belgian Blue, Peranakan Ongole and Its Crossbreed Cattle ABSTRACT. This study was aimed to evaluate and analyze body measurements in Belgian Blue (BB), Ongole Breed (PO) and its crossbreed (BBPO) cattle. The number of cattle used in the study were 30 heads, with 7 heads of Belgian Blue cattle, 8 heads of Ongole breed cattle, and 15 heads of its crossbreed cattle were kept in the Animal Embryo Centre (BET) Cipelang Bogor. The variables observed were body length, withers height, chest depth, chest width, girth depth, rump height, and hip-width and the calculated indexations were weight, height slope, length index 1, length index 2, width slope, depth index, and foreleg length. The body measurement data on each breed of cattle was corrected by age and sex. Furthermore, analysis of body measurement and indexing was using Analysis of variance (ANOVA) with SAS program 9.4. As for Principal Component Analysis (PCA) with a biplot approach analyzed using XLStat program. The result showed that body measurement and indexing on each breed of cattle was different (P0.05). The result of principal component analysis (PCA) suggested that the three breeds analyzed to separate the BB, PO, and it's a crossbreed. The BB and its crossbreed had specific character and became an identifying mark in every breed of cattle. Thus, the direction of the selection can refer to the qualities desired as producing beef cattle type.

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