open access
메뉴
open access
메뉴
ISSN : 1225-3480
A comparative analysis of size and age structures of coastal subfossil shell assemblages of the shortnecked clam Ruditapes philippinarum from open and protected bays of Cheju Island (Korea) was carried out. On the whole, taking into account the damage of small fragile shells, size and age structures of the shell assemblages corresponded to the classical curve of bivalve population distribution when its mortality diminishes with age increase up to a certain threshold. It was found that shell samples from open bays of the western, southern and eastern coasts included shells of smaller and younger individuals (L ≤ 40 mm, ≤ 4 years) than samples from the eastern protected bay (L ≤ 54.5 ㎜, ≤ 6 years). Evidently, strong wave activity was the reason for a short life-span of the clams from the open areas. Growth was investigated retrospectively by annual growth rings on the shells. Growth rates of the clams from the various coasts of Cheju Island differed. However, growth rates of the clams from different biotopes at the same (eastern) side of the Island were similar. Shell height/length and width/length ratios statistically significantly increased with the clam age increase. Most likely, the reason for such shell shape alteration is that more conglobated individuals more survive being more energy-optimal than oblong specimens.
Cho, S.M. and Jeong, W.G. (2007) Ecological study of shortnecked clam Ruditapes philippinarum from the Jindu coast of Hansan Island, Korea. Korean Journal of Malacology, 23: 25–30. [in Korean]
Cho, S.M., Jeong, W.G. and Lee, S.J. (2008) Ecologically sustainable management of short-necked clam, Ruditapes philippinarum, on the coast of Yeongi at Tongyeong, Korea. Korean Journal of Malacology, 24: 189–197. [in Korean]
Choi, Y.S., Cho, Y.P. and Lee, C.S. (2000) The relationships between environmental conditions and morphological characteristics of Manila clam, Ruditapes philippinarum in the west coast of Korea. Bulletin of National Fisheries Research and Development Institute, 58:56-63. [in Korean]
Cigarria, J. and Fernandez, J.M. (2000) Management of Manila clam beds I. Influence of seed size, type of substratum and protection on initial mortality. Aquaculture, 182: 173-182.
Hallam, A. (1967)The interpretation of size-frequency distribution in molluscan death assemblages. Palaeontology, 10: 25-42.
Han, K.N., Lee, S.W. and Wang, S.Y. (2008) The effect of temperature on the energy budget of the Manila clam, Ruditapes philippinarum. Aquaculture International, 16: 143–152.
Isono, R.S., Kita, J. and Kishida, C. (1998)Upper temperature effect on rates of growth and oxygen consumption of the Japanese littleneck clam, Ruditapes philippinarum. Nippon Suisan Gakkaishi, 64: 373–376.
Fan, D., Zhang, A., Yang, Z. and Sun, X. (2007) Observations on shell growth and morphology of the bivalve Ruditapes philippinarum. Chinese Journal of Oceanology and Limnology, 25: 322–329.
Kanazawa, T. and Sato, S. (2008) Environmental and physiological controls on shell microgrowth pattern of Ruditapes philippinarum(Bivalvia: Veneridae) from Japan. Journal of Molluscan Studies, 74. Part 1: 89–95.
Kang, K.H., Chang, J.Y. and Kim, Y.H. (2000) Growth Comparison of short neck clams, Tapes Philippinarum between the two culturing areas. Korean Journal of Malacology, 16: 49–54. [in Korean]
Lee, J.J. and Hyan, J.M. (1992) Biological studies of the Eastern coastal area in Cheju Island. Seasonal changes of macroinvertabrate community on the intertidal rocky shores. Korean Journal of Malacology, 8: 1–20. [in Korean]
Lee, J.J. and Kim, J.Ch. 1993. Biological study of the Western coastal area in Cheju Island. Distribution and seasonal community changes of the benthic macroinvertabrate on the rocky intertidal zone of Biyangdo. Korean Journal of Malacology, 9: 68–84. [in Korean]
Mann, R. (1979) The effect of temperature on growth, physiology, and gametogenesis in the Manila clam Tapes philippinarum (Adams & Reeve, 1950). Journal of Experimental Marine Biology and Ecology, 38: 121–133.
Noseworthy, R.G., Lim, N.R. and Choi, K.S. (2007) A catalogue of the mollusks of the Jeju Island, South Korea. Korean Journal of Malacology, 23: 65–104.
Scarlato, O.A. (1981) Bivalves of temperate zone of the Western Pacific Ocean. 480 p. Nauka. Leningrad. [in Russian]
Shimoyama, S. (1984) Size-frequency distributions of living population and dead shell assemblages of Macoma (Macoma) incongrua (Martens) on an intertidal mud-flat in North Kyushu. Memories of the Faculty of Science, Kyushu University, Series D, Geolology, 25: 271-287.
Shin, H.C. and Shin, S.H. 1999. Population Biology of short-necked clam (Ruditapes philippinarum:Bivalvia) in Kwangyang Bay, southern coast of Korea. I. Growth and benthic environments. Korean Journal of Malacology, 15: 21-30. [in Korean]
Silina,A.V. 1990. Comparative research of the size and age structures of populations of alive scallops, their subfossil and Holocene assemblages. In: Distribution and ecology present and fossil sea organisms pp. 142-152. Far Eastern Branch, Academy of Sciences of USSR. Vladivostok. [in Russian]
Silina, A.V. (1996) Mortality of late juvenile and adult stages of the scallop Mizuhopecten yessoensis (Jay). Aquaculture, 141: 97-105.
Silina, A.V.(2003) Swift's scallop in living populations, coastal subfossil and Holocene assemblages in open parts of Peter the Great Bay, Sea of Japan. In:TEACOM publication. No 8. Reports of the Workshop on the global change studies in the Far East. Sept. 11-15, 2000 pp. 129-141. Dalnauka. Vladivostok.
Silina, A.V. and Popov, A.M. (1989) Growth of the bivalve mollusk Ruditapes philippinarum from Peter the Great Bay (Sea of Japan) by the shell structure. Soviet Journal of Marine Biology, 15(4): 265-271.
Silina, A.V. and Pozdnyakova, L.A. (1996) Spisula sachalinensis in living population, subfossil and Holocene shell assemblages. Annual report of the Western Society of Malacologists, 28: 3-6.
Son, P.W. and Kim, E.J. (2006) Oogenesis and reproductive cycle in Ruditapes philippinarum on the West coast of Korea. Korean Journal of Malacology, 22: 51–61. [in Korean]
Yanin, B.G. (1983) Bases of the taphonomy. 184 p. Nedra. Moscow. [in Russian]
Zhang, C.I., Jo, S.G. and Sohn, M.H. (1994) Population ecological study of culturing shortnecked clam near Kunsan, west coast of Korea. Proceedings of the First International Symposium on Coastal Resources and Environmental Protection, 1(1): 157–172. [in Korean]