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Morphometric Variations and Fishery Unit Assessment of Cyclocheilichthys apogon (Actinopterigii: Cyprinidae) from Three-Different Rivers in North-Eastern Thailand

Morphometric Variations and Fishery Unit Assessment of Cyclocheilichthys apogon (Actinopterigii: Cyprinidae) from Three-Different Rivers in North-Eastern Thailand

Anan Kenthaoand Pornpimol Jearranaiprepame*

Department of Biology, Faculty of Science, Khon Kaen University, Mueang, Khon Kaen 40002, Thailand

*      Corresponding author: porjea@kku.ac.th

Fig. 1.

Locations of sampling sites: 1-Ubolratana dam (URD), 2-Kaeng Lawa (KLW), 3-Kaeng Nam Ton (KNT) and 4-Huai Chorakhe Mak (HCM).

Fig. 2.

Schematic image of beardless barb Cyclocheilichthys apogon showing 32 truss-network measurements constructed from 14 anatomical landmarks.

Fig. 3.

Bivariate scatterplots of Cyclocheilichthys apogon individuals along PC1-PC2 and PC1-PC3 axes of principal component analysis (PCA) for testing morphological variations among populations.

Fig. 4.

Patterns of morphological variation derived from the first three principal components (PC1-PC3) of principal component analysis (PCA) and multiple-pairwise comparisons for testing morphological variabilities among populations of Cyclocheilichthys apogon.

Fig. 5.

Discrimination plot of Cyclocheilichthys apogon individuals along DF1-DF2 axes of discriminant function analysis (DFA) on truss-network variables showing three separated groupings of the samples according to their river drainages.

Pakistan Journal of Zoology

December

Vol. 49, Iss. 6, Pages 1937-2341

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