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Morphometric Measurements and Meristic Counts of the Fish Alestes baremoze from the River Nile and its Tributaries, Sudan
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Morphometric Measurements and Meristic Counts of the Fish Alestes baremoze from the River Nile and its Tributaries, Sudan
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Journal Article
Morphometric Measurements and Meristic Counts of the Fish Alestes baremoze from the River Nile and its Tributaries, Sudan
2019
Overview
Morphometric indices are used for identification of fish to the species level. In this study ratios indices, morphometric measurements and meristic counts were used to compare and differentiate Alestes baremoze that is collected from different areas of River Nile; Atbara River (Khashm El Girba), Blue Nile (Sinnar) and the main course of River Nile (Kreima). Examination of morphological characters in 267 samples showed statistical significant difference (P=0.000) between groups. Discriminant functions calculated from the 13 selected variables and the variables that mostly influenced the separation of A. baremoze from the three sites were: Head length (HL), Pre-pelvic length (PPL), Pectoral fin length (PFL), Pre-anal length (PAL), Pre-pectoral length (PPCL), Caudal-peduncle depth (CPD), Anal-fin base length (AFBL) and Anal fin ray (AFR) in function 1 and Body width (BW), Lateral line scale (LLS), Scales above lateral line (SALL), Inter orbital distance (IOD) in function 2. The scatter plot of the Canonical discriminant function (CDF) showed an overlap between the populations from Khashm El Girba and Sinnar and with few specimens from Kreima population. The Chi-square was highly significant, indicating population with definite differences between the three populations from the three sites (X2=5.991, df=26, p=0.000). Thus, hierachical cluster analysis of morphometric measurements and meristic counts shows the present of closely relationship between the two populations of Alestes baremoze from Khashm El Girba and Sinnar.
Publisher
جامعة كسلا
Subject
