PRINCIPAL COMPONENTS ANALYSIS OF ALBURNUS MOSSULENSIS MORPHOLOGY
|Mehdi Yousefian*, Kelara Keshavarz and Yeganeh Yagoubi Kafshkari
Department of Fishery, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran
|Corresponding Author: Mehdi Yousefian, Department of Fishery, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran , Email: [email protected]|
|Received: 12 January 2013 Accepted: 19 January 2013|
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The aim of the present work was to study the level of population structuring and differences among populations of Alburnus mossulensis in four river at west of Iran. Sampling was performed in summer of 2010 lasting one year, giving rise to 225 samples. Morphological characters were made on 29 characters. Principal components analysis is used to reduce the dimensionality of data, and to transform interdependent variables into significant and independent components. After logarithmic transformation of the variables, the PCA first and second axis accounted for 63.76 % of the total variance. Considering correlation and contributions, the first axis showed an opposition between morphological variation length parameter and length of fins. The second axis showed an opposition between scales in upper and down of lateral line. The third component consists of scale around the tail and forth component scales along lateral line. In present study, PCA revealed that morphometric differentiation between samples was largely located in meristic characters such as number of scale in upper and down part of lateral line, scales of the tail, soft and hard fin ray of dorsal and anal fin.