ISSN : 1225-3480
Comparison of different morphological characteristics of bivalves is very useful for distinguishing species. Therefore, this study used a morphometric approach to document patterns of phenotypic change through the specimens of family Pinnidae inhabiting the bottom sediments at the coasts of An Thoi Archipelago (south-eastern Gulf of Thailand), in that way excluding intraspecific variations among different populations along a wide geographical range. It was revealed that individuals determined as Pinna trigonium separated from specimens of Pinna nigra and Atrina vexillum at high level, but P. nigra and A. vexillum were the single species A. vexillum, as it is assumed now. Also, it was found that both groups of P. trigonium individuals and A. vexillum specimens divided into tree subgroups unified the specimens with the similar morphometric parameters: small, medium and large within the populations, though there were no evident divisions into subgroups in the size distributions of the populations. In addition to the interspecific morphological variations, the species also showed significant intraspecific morphological variations even in the same population. Most probable reason for the appearance of the intraspecific morphological variations and division of all specimens into size-specific subgroups in the population is the fact that the growth of Pinnidae bivalves is not isometric.
Abbott, R.T. and Dance, S.P. (1982) Compendium of seashells. E.P. Dutton Inc. New York. 311 pp.
Bernard, F.R., Cai, Y.Y. and Morton, B. (1993) Catalogue of the living marine bivalve molluscs of China. Hong Kong University Press, Hong Kong. 121 pp.
Dorofeeva, L.А., Pozdnyakova, L.А. and Silina, А.V. (1987) Dependence of growth rate and calcium-magnium ration in Pinna fumata shells on environmental temperature. Biulleten' Moskovskogo obshchestva ispytatelei prirody. Otdel Geologicheskii (Bulletin of the Moscow Society of Naturalistes. Section Geology), 62(6): 109-115. [in Russian]
Garcia-March, J.R., Garcia-Carrascosa, A.M., Cantero, A.L.P. and Wang, Y.G. (2007) Population structure, mortality and growth of Pinna nobilis Linnaeus, 1758 (Mollusca, Bivalvia) at different depths in Moraira Bay (Alicante, Western Mediterranean). Marine Biology, 150(5): 861-871.
Garcia-March, J.R., Garcia-Carrascosa, A.M. and Pena, A.L. (2002) In situ measurement of Pinna nobilis shells for age and growth studies: A new device. Marine Ecology-Publicazioni della Stazione Zoologica di Napoli, 23(3): 207-217.
Habe, T. (1968) Shells of the Western Pacific in color. Vol. 2. Hoikusha Publishing Co., LTD. Japan. Osaka. 233 pp.
Hedley, C. (1924) A revision of the Australian Pinnidae. Records of the Australian Museum, 14(3): 141-153.
Huber, M. (2010) Compendium of bivalves. A full-color guide to 3,300 of the World’s Marine Bivalves. A status on Bivalvia after 250 years of research. ConchBooks, Hackenheim, Germany. 901 pp.
Malakhov, V.V., Yakovlev, Yu. M. and Blinov, S.V. (1985) Studies of the biology of commercial bivalve mollusks during IX cruise of the R/V “Berill” in the coastal waters of South Vietnam. Soviet Journal of Marine Biology, 3: 71-74.
Morris, S. and Purchon, R.D. (1981) The marine shelled mollusca of West Malaysia and Singapore. Part 3. Bivalvia. The Journal of Molluscan Studies, 47(3): 322-327.
Okan, Y. and Hosgor, I. (2009) Early Eocene (middle-late Cuisian) Molluscs assemblage from the Harpactcarcinid beds, in the Yoncali formation of the Cankiri Basin, central Anatolia, and implications for Tethys paleogeography. Geological Bulletin of Turkey, 52(1): 1-9.
Poutiers, J.M. (1998) Bivalves (Acephala, Lamellibranchia, Pelecypoda). In: FAO species identification guide for fishery purposes. In: (ed. by Carpenter, K.E. and Niem, V.H.) The living marine resources of the western central Pacific. Vol. 1: Seaweeds, corals, bivalves and gastropods. pp. 123-141. FAO. Rome.
Purchon, R.D. and Purchon, D.E.A. (1981) The marine shelled mollusca of West Malaysia and Singapore. Part 1. General introduction and an account of the collecting stations. The Journal of Molluscan Studies, 47(3): 290-312.
Rabaoui, L., Zouari, S.T., Katsanevakis, S. and Ben Hassine, O.K. (2007) Comparison of absolute and relative growth patterns among five Pinna nobilis populations along the Tunisian coastline: an information theory approach. Marine Biology, 152(3): 537-548.
Rosewater, J. (1961) The family Pinnidae in the Indo-Pacific. Indo-Pacific Mollusca, 1(4): 175-226.
Silina, A.V. (2010) Spatial and temporal changes in the population structure of bivalve Pinna fumata at the South Vietnam. In: Proceedings of the International Conference Marine Biodiversity of East Asian Seas: Status, Challenges and Sustainable Development. Nha Trang, Vietnam, December 6-7, 2010. pp. 98-100. Nha Trang.
Silina, A.V. (2011) The Indo-Pacific pen shell Atrina vexillum in south-eastern Siam Bay (South China Sea). In: Proceedings of the International Conference Coastal Marine Biodiversity and Bioresources of Vietnam and Adjacent Areas to the South China Sea. Nha Trang, Vietnam, November 24-25, 2011. pp. 12-16. Nha Trang.
Yonge, C.M. (1953) Form and habit in Pinna carnea Gmellin. Phylosophical Transactions of the Royal Society of London. Ser. B. Biological Sciences, 237(648): 335-374.
