scholarly journals Multivariate principal components analysis of the morphostructural traits of West African Dwarf sheep

2021 ◽  
Vol 41 (2) ◽  
pp. 34-43
Author(s):  
D. Campos ◽  
C. O. N. Ikeobi ◽  
O. Olowofeso ◽  
O. F. Smith
Keyword(s):  
Body Weight ◽  
Principal Components Analysis ◽  
Principal Components ◽  
Principal Component ◽  
West African ◽  
Phenotypic Correlation ◽  
West African Dwarf ◽  
Components Analysis ◽  
West African Dwarf Sheep ◽  
Dwarf Sheep

A study was conducted to determine the interdependence among conformation traits of 178 West African Dwarf sheep and to predict body weight from their independent scores using principal components analysis. Body weight and nine morphostructural traits: height at withers, body length, heart girth, rump height, hip width, chest depth, fore canon bone length, tail length, and ear length were measured. Phenotypic correlation coefficients between body weight and body dimensions ranged from 0.78 to 0.79. Anti-image correlations of the body shape characters showed that partial correlations were low. Two principal components were extracted from the factor analysis with varimax rotation of the inter-correlated traits which accounted for 69.50% of the total variance. The first principal component (PC1) explained 57.70% and second principal component (PC2) contributed 11.70% of the variance. Both PC1 and PC2 could be considered in the selection programme to obtain animals with better conformations using minimal number of measurements.

scholarly journals REPRODUCTIVE PERFORMANCE OF WEST AFRICAN DWARF SHEEP AND GOATS AT VILLAGE LEVEL IN OGUN STATE, NIGERIA

2021 ◽  
Vol 25 (1) ◽  
pp. 79-82
Author(s):  
S. S. ABIOLA ◽  
C. F. I. ONWUKA
Keyword(s):  
Body Weight ◽  
Reproductive Performance ◽  
West African ◽  
Multiple Birth ◽  
Sheep And Goats ◽  
West African Dwarf ◽  
Village Level ◽  
Ogun State ◽  
West African Dwarf Sheep ◽  
Dwarf Sheep

Reproductive performance of 20 pregnant ewes and 20 pregnant does of West African Dwarf breeds at village level in Ogun State, Nigeria were compare in a study which lasted for 8 months. Litter size in ewes was 1.50 while that of does was 1.85. the number of males produced by the two species out-numbered that of females. However, multiple birth were higher in goat that in sheep. Results of birth weights and body weight of lambs and kids at 3 month of age were significantly different (P < 0.05). Lambs were heavier at birth with overall mean birth weight of 2.00kg compared with 1.48kg recorded for kids. At the age of 3 monthes the overall body weight of lamb was 10.38kg while that of kid was 7.61kg. mortality in lamb was 23.33% as against 10.81% in kids. Effective management system of West African Dwarf sheep and goats at village level before and after birth will improve the reproductive efficiency of the species

scholarly journals Effect of Levels of Feeding and Saccharomyces Cerevisiae on Some Haematological and Biochemical Indices in West African Dwarf Sheep

2020 ◽  
Vol 8 (8) ◽  
Author(s):  
Charles Onochie Osita ◽  
Augustine Ogbonna Ani ◽  
Chika Ethelbert Oyeagu ◽  
Eunice Amaka Akuru ◽  
Nnanna Ephraim Ikeh ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
West African ◽  
West African Dwarf ◽  
Biochemical Indices ◽  
West African Dwarf Sheep ◽  
Dwarf Sheep

scholarly journals Measuring the Systematic Risk of Sectors within the US Market Via Principal Components Analysis: Before and during the COVID-19 Pandemic

2022 ◽  
Author(s):  
Jaime González Maiz Jiménez ◽  
Adán Reyes Santiago
Keyword(s):  
Principal Component Analysis ◽  
Stock Market ◽  
Principal Components Analysis ◽  
Principal Components ◽  
Systematic Risk ◽  
Principal Component ◽  
Component Analysis ◽  
Market Capitalization ◽  
The Us ◽  
Components Analysis

This research measures the systematic risk of 10 sectors in the American Stock Market, discerning the COVID-19 pandemic period. The novelty of this study is the use of the Principal Component Analysis (PCA) technique to measure the systematic risk of each sector, selecting five stocks per sector with the greatest market capitalization. The results show that the sectors that have the greatest increase in exposure to systematic risk during the pandemic are restaurants, clothing, and insurance, whereas the sectors that show the greatest decrease in terms of exposure to systematic risk are automakers and tobacco. Due to the results of this study, it seems advisable for practitioners to select stocks that belong to either the automakers or tobacco sector to get protection from health crises, such as COVID-19.

scholarly journals Principal Component Analysis of Morphometric Traits of West African Dwarf Goats

2019 ◽  
Vol 1 ◽  
pp. 26-32 ◽  
Author(s):  
I O Dudusola ◽  
S O Oseni ◽  
M A Popoola ◽  
A Jenyo
Keyword(s):  
Principal Component Analysis ◽  
Body Weight ◽  
Total Variation ◽  
Age Groups ◽  
Principal Component ◽  
Component Analysis ◽  
West African ◽  
Age Group ◽  
Morphometric Traits ◽  
West African Dwarf

The study was conducted to evaluate the principal component analysis of phenotypic attributes of West African Dwarf (WAD) goat. Data collected on the live body weight and twelve morphometric traits of the goats which were categorised into four age groups based on their dentition. The age groups were: less than 2years old, 2- 3years old, 3-4 years old and 4 years old. The data were subjected to a PCA and Cluster analyses using the multivariate procedure components of SAS (2003). Result revealed that highest values of morphometric traits were obtained in goats that of 4 years old. The rate of increase in body weight and other morphometric traits was high in age group of ˂2 years to age 2-3years compared to differences observed in others across the age group. Heart Girth had the highest correlation with body weight. Foreleg, neck, ear and hind leg lengths; wither height and rump height were weakly correlated with the body weight of the goats. Result revealed that two Principal components were retained in the first age group (age group˂2years) which accounted for 72.99% of the total variation. The first PC alone accounted for 63.13% of the total variation while PC2 accounted for the remaining 9.86%. From this study, it was concluded that there is interdependence among body weight and morphometric traits and that morphometric traits can be used in predicting live weight of WAD goats; PCA and Cluster could be exploited in breeding and selection programmes to acquire highly coordinated animal bodies using fewer measurements.

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