Describing Scale Shape Morphology of Glossogobius Giuris using Landmark-based Geometric Morphometrics


  • Jocelyn O. Pattuinan Department of Biological Sciences, College of Science and Mathematics of the MSU-Iligan Institute of Technology, Iligan City
  • Cesar G. Demayo Department of Biological Sciences, College of Science and Mathematics of the MSU-Iligan Institute of Technology, Iligan City



Glossogobius giuris, Geometric morphometrics, Relative warps, Phenotypic plasticity


In the conservation of biodiversity, natural resources, and fisheries management, species identification and population discrimination are necessary. In freshwater fishes, the scale morphology and squamation is important because this can be helpful in the identification of fishes up to the extensive levels of species, sex determination and pathology of fish. Glossogobius giuris is an endemic species and considered important in Balo-i, Lanao del Norte and Mandulog River in Iligan City, Philippines. It is locally known as "kadurog”. The fish is highly commercialized because it provides food for the community, thus this study was conducted. We used scale morphology to distinguish male and female of G. giuris using landmark-based geometric morphometrics. Results of the study have shown that there is no sexual dimorphism in the fish based on scale shapes. However, variations of the scales do exist within sexes based on the results of the relative warp analysis. The variations observed can be attributed to environmental factors affecting the development of the fish and thus resulting to phenotypic plasticity in the patterns of variation in the scale shapes among individuals.


Download data is not yet available.


P. Akihito and K. Meguro, Description of a new Gobiid fish, Glossogobiusaureus, with notes on related species of the genus, Japanese Journal of Ichthyology 22(3) (1975).

D. Hoese and G. Allen, Description of the three new species of Glossogobius from Australia and New Guinea, Zootaxa 1981, 1 – 14 (2009).

A.R. Joadder, Length-weight Relationship and Condition Factor (Ka) of Gobi, Glossogobius giuris (Hamilton) from "Atrai River” in the Northern Part of Bangladesh, Journal of Fisheries International 4(1), 1 – 4 (2009).

F.L. Bookstein, Morphometric Tools for Landmark Data: Geometry and Biology, Cambridge University, Press Cambridge, UK (1996, 1991).

I.L. Dryden and K.V. Mardia, Statistical Shape Analysis, John Wiley and Sons, New York (1998).

R. Patterson, T. Wright, C. Wright, A.S. Chang, L.A. Taylor, P.D. Lyons, A. Dallimore and A. Kumar, Atlas of common Squamatological (fish scale) material in Coastal British Columbia and an assessment of the utility of various scale types in Paleofisheries reconstruction, Brit. Columbia Fish-Scale Atlas. Palaeontologia Electronica 4(1), p. 88, available at, 2002.

F.J. Rohlf, tpsDig, version 2.17, Department of Ecology and Evolution, State University of New York Stony Brook (2010).

O. Hammer, D.A.T. Harper and P.D. Ryan, PAST: Paleontological Statistics Software Package for Education and Data Analysis, Paleontologia Electronica 4(1), p. 9 (2004).

L. Klappenbach, Animal/wildlife guide: What is sexual dimorphism?, Guide, New York Times Company (2010).

N. Poulet, P. Balaresque, T. Aho and M. Bjorklund, Genetic structure and dynamics of a small introduced population: the pikeperch, Sander lucioperca, in the Rhí´ne delta, Genetica 135, 77 – 86 (2009).

S.X. Cadrin, Advances in morphometric analysis of fish stock structure, Reviews in Fish Biology and Fisheries 10, 91 – 112 (2000).

E. Dorado, Sexual Dimorphism in Body Shapes of the White Goby, Glossogobius giuris, (Hamilton and Buchanan, 1822) of lake Buluan in Mindanao, A Dissertation, MSU-IIT Iligan City (2010).

D. Matondo, M.A. Torres, S.R. Tabugo, J. Gorospe and C.G. Demayo, Describing scale shapes of the male and gemale Glossogobius aureus Akihito and Meguro, 1975 from Tumaga River, Zamboanga City, Philippines, Egypt. Acad J. Biology Science 4(1), 47 – 58 (2012).

S. Nacua, E. Dorado, M.A. Torres and C.G. Demayo, Body shape variation between two populations of the White Goby, Glossogobius giuris (Hamilton and Buchanan), Research Journal of Fisheries and Hydrobiology 5(1), 44 – 51 (2010).




How to Cite

Pattuinan, J. O., & Demayo, C. G. (2017). Describing Scale Shape Morphology of Glossogobius Giuris using Landmark-based Geometric Morphometrics. Journal of Informatics and Mathematical Sciences, 9(4), 1103–1108.



Research Articles