© 2022 Iranian Society of Ichthyology 

Short Communication 
The effect of non-prepared ecological data on the decision of multivariate analysis: A case 

study of water quality data of the Shatt Al-Arab River, Iraq 
 

Mujtaba A.T. Ankush*1 

 
College of Agriculture, University of Basrah, Basrah, Iraq. 

 

 

 

 

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Table 1.

Parameter Unit 
Site1 Site2 Site3 

Mean Min-Max Mean Min-Max Mean Min-Max 

WT °C 24.47 13.4-31.8 14.00 14-32.8 25.14 16.9-33 

pH  8.14 7.3-8.94 7.20 7.2-8.9 8.38 7.1-9.2 

EC μS/cm 4173.67 3260-5350 2958.00 2958-4920 3357.79 2530-4135 

DO mg/l 5.37 4.4-5.96 4.20 4.2-5.7 5.66 4.1-6.5 

BOD mg/l 2.16 1.82-2.9 1.26 1.26-3 2.04 1.24-2.72 

Turbidity NTU 14.49 6.9-28.5 6.00 6-36 27.33 12-100 

TH mg/l 1460.83 920-2000 880.00 880-2400 1370.56 780-2800 

NO3 mg/l 1.60 0.74-2.5 0.66 0.66-2.74 1.57 0.54-2.72 

PO4 mg/l 2.55 1.02-3.88 1.00 1-4.02 2.62 1.4-3.84 



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Table 2.

Variable Comp.1 Comp.2 Comp.3 Comp.4 Comp.5 Comp.6 Comp.7 Comp.8 Comp.9 

WT -0.89612 0.15160 0.21736 -0.18784 0.11226 0.00968 0.08946 -0.02665 0.26466 

pH -0.37803 0.31667 0.76967 0.20686 0.28523 0.02449 0.10016 0.11054 -0.13205 

EC 0.73212 0.14407 -0.27285 0.07326 0.43610 -0.17989 0.35619 0.10097 0.06172 

DO 0.31449 0.68948 -0.12701 0.30545 0.00818 0.55726 0.00119 -0.05929 0.04644 

BOD 0.01971 -0.78733 0.05734 0.53074 -0.09034 0.14547 -0.03142 0.23660 0.09199 

Turbidity 0.31010 0.60198 0.19826 0.23904 -0.58604 -0.29291 0.08749 0.06762 0.05950 

TH 0.76349 0.01652 0.34981 0.18994 0.28069 -0.18166 -0.34398 -0.13384 0.10165 

NO3 0.53381 -0.55734 0.44429 -0.10603 -0.19022 0.15596 0.29089 -0.22472 0.01234 

PO4 0.64625 0.07272 0.24539 -0.63882 -0.06604 0.18226 -0.09638 0.24624 0.03558 



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References 

Table 3.

Variable Before  transformation After transformation 

WT 0.0267 0.0374 

pH 0.1838 0.2488 

EC 0.7338 0.8816 

DO 0.187 0.187 

BOD 0.3572 0.3512 

Turbidity 0.0001 0.7793 

TH 0.0462 0.6852 

NO3 0.444 0.4429 

PO4 0.0294 0.03 

Table 4.

Variable Comp.1 Comp.2 Comp.3 Comp.4 Comp.5 Comp.6 Comp.7 Comp.8 Comp.9 

Std WT -0.90701 0.01783 0.10440 0.23376 0.16852 0.08562 0.11574 0.03572 0.24712 

Std pH -0.45433 0.26018 0.77007 0.08724 0.27229 0.14204 0.01865 0.08511 -0.15285 

Std EC 0.71776 0.26478 -0.22065 -0.13878 0.47312 0.00789 0.31990 0.14291 0.01036 

Std DO 0.20290 0.74736 -0.05139 -0.28826 -0.15952 0.52782 -0.07760 -0.04322 0.05117 

Std BOD 0.13363 -0.73155 0.27187 -0.50247 -0.18669 0.10477 -0.01298 0.26686 0.05815 

Std Turbidity -0.06640 0.73301 0.26422 -0.15574 -0.45397 -0.33950 0.19517 0.06325 0.02803 

Std TH 0.71862 0.15041 0.47719 -0.16954 0.27098 -0.21327 -0.22966 -0.12086 0.13508 

Std NO3 0.60579 -0.46154 0.38399 0.26347 -0.22158 0.18744 0.27578 -0.20591 0.02120 

Std PO4 0.63137 0.17522 0.03015 0.67915 -0.15262 0.05164 -0.13897 0.24928 0.03335 



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