Morphometric and meristic variation in two congeneric archer fishes Toxotes chatareus (Hamilton 1822) and Toxotes jaculatrix (Pallas 1767) inhabiting Malaysian coastal waters

Simon, K. D., Bakar, Y., Temple, S. E. and Mazlan, A. G. (2010) Morphometric and meristic variation in two congeneric archer fishes Toxotes chatareus (Hamilton 1822) and Toxotes jaculatrix (Pallas 1767) inhabiting Malaysian coastal waters. Journal of Zhejiang University: Science B, 11 11: 871-879. doi:10.1631/jzus.B1000054


Author Simon, K. D.
Bakar, Y.
Temple, S. E.
Mazlan, A. G.
Title Morphometric and meristic variation in two congeneric archer fishes Toxotes chatareus (Hamilton 1822) and Toxotes jaculatrix (Pallas 1767) inhabiting Malaysian coastal waters
Formatted title
Morphometric and meristic variation in two congeneric archer fishes Toxotes chatareus (Hamilton 1822) and Toxotes jaculatrix (Pallas 1767) inhabiting Malaysian coastal waters
Journal name Journal of Zhejiang University: Science B   Check publisher's open access policy
ISSN 1673-1581
1862-1783
Publication date 2010-11
Sub-type Article (original research)
DOI 10.1631/jzus.B1000054
Volume 11
Issue 11
Start page 871
End page 879
Total pages 9
Place of publication Hangzhou, Zhejiang, China
Publisher Zheijiang University Press
Collection year 2011
Language eng
Formatted abstract
A simple yet useful criterion based on external markings and/or number of dorsal spines is currently used to differentiate two congeneric archer fish species Toxotes chatareus and Toxotes jaculatrix. Here we investigate other morphometric and meristic characters that can also be used to differentiate these two species. Principal component and/or discriminant functions revealed that meristic characters were highly correlated with pectoral fin ray count, number of lateral line scales, as well as number of anal fin rays. The results indicate that T. chatareus can be distinguished from T. jaculatrix by having a greater number of lateral line scales, a lower number of pectoral fin rays, and a higher number of anal fin rays. In contrast, morphometric discriminant analyses gave relatively low distinction: 76.1% of fish were ascribed to the correct species cluster. The observed morphometric differences came from the dorsal and anal spines lengths, with T. chatareus having shorter dorsal and longer anal spines than T. jaculatrix. Overall, meristic traits were more useful than morphometrics in differentiating the two species; nevertheless, meristics and morphometrics together provide information about the morphological differentiation between these two closely related archer fishes.
© 2010 Zhejiang University and Springer-Verlag Berlin Heidelberg.
Keyword Archer fish
Toxotes chatareus
Toxotes jaculatrix
Species identification
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biomedical Sciences Publications
 
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Created: Sun, 16 Jan 2011, 00:07:22 EST