Principal Components Analysis of Chondrochilus Reginus Morphology
نویسندگان
چکیده
Tigris, are widespread in west of Iran and lives mostly in river and lake. They are omnivorous fish. This study aims to investigate population structure of C. reginus using Principal component Analysis. The study was conducted in three rivers that is the most remote headstream of the Gamasiab River in west part of Iran. Seven quantitative traits were measured for each specimen. After logarithmic transformation of the variables, the PCA first and second axis accounted for 38.4% and 17.6% of the total variance respectively. Considering correlation and contributions, the first axis showed an opposition between morphological variations (length parameters). The second axis showed an opposition between gonad weight and GSI. The third important factor in PCA analysis was the liver weight, HIS and visceral weight that was accounted for 12.6 % of the total variance. In conclusion there were precise differentiations among the three rivers samples in three factor estimated by PCA. Ket words: Chondrochilus reginus, PCA, Gamasib River, HIS, GS
منابع مشابه
A new weighting approach to Non-Parametric composite indices compared with principal components analysis
Introduction of Human Development Index (HDI) by UNDP in early 1990 followed a surge in use of non-parametric and parametric indices for measurement and comparison of countries performance in development, globalization, competition, well-being and etc. The HDI is a composite index of three indicators. Its components are to reflect three major dimensions of human development: longevity, knowledg...
متن کاملPersian Handwriting Analysis Using Functional Principal Components
Principal components analysis is a well-known statistical method in dealing with large dependent data sets. It is also used in functional data for both purposes of data reduction as well as variation representation. On the other hand "handwriting" is one of the objects, studied in various statistical fields like pattern recognition and shape analysis. Considering time as the argument,...
متن کاملEvaluation and Geographical analysis of the principal components affecting urban economic sustainability, Case study: Cities of Chaharmahal and Bakhtiari Province
Abstract Aims & Backgrounds: Today, economic challenges are one of the most important obstacles to achieving sustainability in the cities of developing countries. Therefore, recognition and geographical analysis of the factors affecting the economic sustainability of cities are among the important goals and priorities of urban and regional planning. Methodology: This research has been done by q...
متن کاملFunctional Analysis of Iranian Temperature and Precipitation by Using Functional Principal Components Analysis
Extended Abstract. When data are in the form of continuous functions, they may challenge classical methods of data analysis based on arguments in finite dimensional spaces, and therefore need theoretical justification. Infinite dimensionality of spaces that data belong to, leads to major statistical methodologies and new insights for analyzing them, which is called functional data analysis (FDA...
متن کاملOn the Construct Validity of the Reading Section of the University of Tehran English Proficiency Test
University of Tehran administers a test known as The University of Tehran English Proficiency Test (the UTEPT) to PhD candidates on a yearly basis. By definition, the test can be considered a high-stakes one. The validity of high stakes tests needs to be known (Roever, 2001). As Mesick (1988) maintains, if the validity of high stakes tests are not known, it might have some undesirable consequen...
متن کامل