Outline-based Analysis of Sexual Dimorphism in the Shell of the Freshwater Mussel (Margaritifera margaritifera L.)

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Research Paper 01/03/2017
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Outline-based Analysis of Sexual Dimorphism in the Shell of the Freshwater Mussel (Margaritifera margaritifera L.)

Al-Axel O. Joaquino, Danica P. Piñero, Roldan Echem, Cordulo P. Ascaño, Mark Anthony J. Torres
J. Bio. Env. Sci.10( 3), 43-49, March 2017.
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Abstract

This study was conducted to determine the patterns of sexual dimorphism in the vulnerable species of freshwater mussel Margaritifera margaritifera L. The method of Elliptic Fourier Analysis (EFA) was employed to extract shape information from a total of one hundred (100) points collected from digitized images of the shells. The EFA coordinates where then subjected to statistical analyses such as Kruskall-Wallis and Discriminant Function (DFA) test. Results showed differences in the shape of the lateral sides along the hinges of the shell contour pallial line, the pseudocardinal tooth area and at the umbo. Aside from revealing information on sexual dimorphism, the result of this study is discussed in relation to using patterns of sex differences in shell shape to assess the health of aquatic habitats.

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Adajar AQ, Torres MAJ, Demayo CG. 2011. Sexual dimorphism in the shape of the primary flight feathers of Parakeet-Budgerigar, Melopsittacus undulatus Shaw (1805). Proceedings of the 2011 2ND International Conference on Environmental Science and Technology IPCBEE 6(2), 333-337.

Albutra QB, Torres MAJ, Demayo CG. 2012. Outline and landmark based geometric morphometric analysis in describing sexual dimorphism in wings of the white stem borer (Schirpophaga innotata Walker). Animal Biology and Animal Husbandry International Journal of the Bioflux Society 4(1), 5-13.

Diaz G, Zuccarelli A, Pelligra I, Ghiani A. 1989. Elliptic Fourier analysis of cell and nuclear shapes. Comparative Biomedical Research  22, 405-414.

Ferson S, Rohlf FJ, Koehn RK. 1985. Measuring shape variation of two-dimensional outlines. Systematic Zoology 34, 59- 68.

Goodwin BJ, Fish JD. 1977. Inter- and Intraspecific variation in Littorina obtusata and L. mariae (Gastropoda: Prosobranchia). Journal of Molluscan Studies 43, 241-254.

Hammer Ø, Harper DAT, Ryan PD. 2001. PAST: paleontological statistics software package for education and data analysis. Palaeontologia Electronica 4, 1.

Iwata H, Niikura S, Matsuura S, Takano Y, Ukai Y. 1998. Evaluation of variation of root shape of Japanese radish (Raphanus sativus L.) based on image analysis using elliptic Fourier descriptors. Euphytica 102, 143-149.

Laurie CC, True JR, Liu J, Mercer JM. 1997. An introgression analysis of quantitative trait loci that contribute to a morphological difference between Drosophila simulans and D. mauritiana. Genetics 145, 339-348.

Mollusc Specialist Group. 1996. Margaritiferamargaritifera. The IUCN Red List of Threatened Species 1996: e.T1279913382532.

Rohlf FJ, Archie JW. 1984. A comparison of Fourier methods for the description of wing shape in mosquitoes (Diptera: Culicidae). Systematic Zoology 33, 302-317.

Rohlf FJ. 2008. TPSUtil version 1.38. Department of Ecology and Evolution, State University of New York at Stony Brook, New York.

Rohlf FJ. 2012. TPSDig version 2.12. Department of Ecology and Evolution, State University of New York at Stony Brook, New York.

Rohlf FJ. 2015. The tps series of software. Hystrix, the Italian Journal of Mammalogy 26, 1-4.

Stillwell RC, Fox CW. 2007. Environmental effects on sexual size dimorphism of a seed-feeding beetle. Oecologia 153, 273–280.

White R, Rentice HC, Verwist T. 1988. Automated image acquisition and morphometric description. Canadian Journal of Botany 66, 450-459.

Yoshioka Y, Iwata H, Ohsawaand R, Ninomiya S. 2004. Analysis of petal shape variation of Primulasieboldii by Elliptic Fourier descriptors and principal component analysis. Annals of Botany 94,  657-664.

Zieritz A, Aldridge DC. 2011. Sexual, Habitat-constrained and parasite-induced dimorphism in the shell of a Freshwater Mussel (Anodonta anatine, Unionidae). Journal of Morphology 272, 1365-1375.