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Journal of Zhejiang University SCIENCE B 2010 Vol.11 No.11 P.871-879

http://doi.org/10.1631/jzus.B1000054


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


Author(s):  K. D. Simon, Y. Bakar, S. E. Temple, A. G. Mazlan

Affiliation(s):  Marine Science Programme, School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D.E., Malaysia, Biology Programme, School of Biological Sciences, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D.E., Malaysia, School of Biomedical Sciences, University of Queensland, Brisbane, Queensland 4072, Australia, Marine Ecosystem Research Centre, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D.E., Malaysia

Corresponding email(s):   skdas_maa@yahoo.com, magfish05@yahoo.com

Key Words:  Archer fish, Toxotes chatareus, Toxotes jaculatrix, Species identification, Multivariate analysis


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

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author="K. D. Simon, Y. Bakar, S. E. Temple, A. G. Mazlan",
journal="Journal of Zhejiang University Science B",
volume="11",
number="11",
pages="871-879",
year="2010",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1000054"
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%0 Journal Article
%T Morphometric and meristic variation in two congeneric archer fishes Toxotes chatareus (Hamilton 1822) and Toxotes jaculatrix (Pallas 1767) inhabiting Malaysian coastal waters
%A K. D. Simon
%A Y. Bakar
%A S. E. Temple
%A A. G. Mazlan
%J Journal of Zhejiang University SCIENCE B
%V 11
%N 11
%P 871-879
%@ 1673-1581
%D 2010
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1000054

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T1 - Morphometric and meristic variation in two congeneric archer fishes Toxotes chatareus (Hamilton 1822) and Toxotes jaculatrix (Pallas 1767) inhabiting Malaysian coastal waters
A1 - K. D. Simon
A1 - Y. Bakar
A1 - S. E. Temple
A1 - A. G. Mazlan
J0 - Journal of Zhejiang University Science B
VL - 11
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SP - 871
EP - 879
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B1000054


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.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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