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ISSN : 1225-3480
As demand on live and half-shell oysters increases globally, the appearance of the oyster is becoming one of the important determinants of marketability. In terms of oyster shape, cultchless single oysters have advantages over the conventional cultched oyster, as the shape of a single oyster is intermittently managed during the grow-out period, resulting in round individuals that are consistent in shape and size. Although a growing number of oyster producers in Korea culture cultchless single oysters, there is no consensus on ‘good-looking shape’ and high marketability among oyster producers and consumers. In this study, we applied three known oyster grades (total weight, SL:SH, and SL based) to Pacific oyster groups to assess the feasibility of the grading system. In addition, the mean condition index (CI) of the oysters corresponding to each category in the grade was compared to decide traits that could be applied in oysters produced in Korea. A total of 888 collected oysters includes diploid oysters reared by long-line culture (2-yrs, 113.9 ± 18.5 mm in SL), diploid (1-yr, 79.5 ± 11.7 mm), and triploid (3-yrs, 152.7 ± 22.6 mm) oyster reared individually in hexagonal plastic containers. The results revealed that the Canadian SL/SH-based grade was applicable, as the single oyster groups with the upper grades demonstrated significantly higher CI than those in the lower grades. We also found a positive correlation between SH/SL ratio and CI in the single oyster group, indicating that oysters with the teardrop shape tend to show a higher CI. It was also notable that any of the traits were not correlated with CI in the cultched oyster group. Thus in this study, we suggest SL/SH ratio as a single oyster trait that could be utilized in oyster grading system.
Bayne, B.L. and Newell, R.C. (1983) Physiological energetics of marine molluscs. In; Wilbur, K. M. and Saleuddin, A.S.M. (Eds), The Mollusca. Academic Press, pp. 407-515.
Bayne, B.L. and Worrall, C.M. (1980) Growth and production of mussels Mytilus edulis from two populations. Marine ecology progress series, 3:317-328.
Borrero, F.J. and Hilbish, T.J. (1988) Temporal variation in shell and soft tissue growth of the mussel Geukensia demissa. Marine ecology progress series, 42(1): 9-15.
Brake, J., Evans, F. and Langdon, C. (2003) Is beauty in the eye of the beholder Development of a simple method to describe desirable shell shape for the Pacific oyster industry. Journal of Shellfish Research, 22(3): 767-772.
Buestel, D., Ropert, M., Prou, J., and Goulletquer, P. (2009) History, status, and future of oyster culture in France. Journal of Shellfish Research, 28(4):813-820.
Cheney, D.P. (2010) Bivalve shellfish quality in the USA: from the hatchery to the consumer. Journal of the World Aquaculture Society, 41(2): 192-206.
Choi, K.-S. (2008) Oyster capture-based aquaculture in the Republic of Korea. Capture-based aquaculture. Global review. FAO Fisheries Technical Paper, 508:271-286.
Davenport, J., Chen, X. (1987) A comparison of methods for the assessment of condition in the mussel (Mytilus edulis L.). Journal of Molluscan Studies, 53(3): 293-297.
DFO (2003) Profile of the American oyster (Crassostrea virginica) Gulf Region. Retrieved April 13, 2021, from https://waves-vagues.dfo-mpo.gc.ca/Library/271085-e.pdf.
Doiron, S. (2008) Reference manual for oyster aquaculturists. New Brunswick Department of Agriculture, Fisheries and Aquaculture.
Evans, S., Camara, M.D. and Langdon, C.J. (2009)Heritability of shell pigmentation in the Pacific oyster, Crassostrea gigas. Aquaculture, 286(3-4):211-216.
FAO (2020) FAO Global Fishery and Aquaculture Productions Statistics. Retrieved April 13, 2021, from http://www.fao.org/fishery/statistics/global-aquacultureproduction/en.
Han, B.-H., Kim, D.-Y. and Ahn, B.-I. (2019) An analysis on the oyster consumption behavior by purpose of consumption and consumer characteristics, Korean Food Marketing Association, 36(4): 119-143.
Kang, J.-H., Kang, H.-S., Lee, J.-M., An, C.-M., Kim, S.-Y., Lee, Y.-M. and Kim, J.-J. (2013)Characterizations of shell and mantle edge pigmentation of a Pacific oyster, Crassostrea gigas, in Korean Peninsula. Asian-Australasian journal of animal sciences, 26(12): 1659.
Kato-Yoshinaga, Y., Kitaoka, C. and Shinagawa, A. (2014) Comparison of free amino acid components in the Pacific oyster reared using two different culture methods in Nagasaki prefecture. Japanese Journal of Food Chemistry and Safety, 21(2): 121-126.
Laxmilatha, P., Surendranath, V.G., Sadasivan, M.P. and Ramachandran, N.P. (2011) Production and growth of cultchless oyster spat of Crassostrea madrasensis (Preston) for single oyster culture. Marine Fisheries Information Service, 207: 8-11.
Lawrence, D.R., Scott, G.I. (1982) The determination and use of condition index of oysters. Estuaries, 5(1):23-27.
Lee, M.-A., Lee, J.-K. and Cha, S.-M. (2008) Analysis on the consumer's attitude and purchase behavior of oysters. Korean Journal of Food and Cookery Science, 24(6): 919-930.
Lim, H.-J., Lee, T.-S., Cho, P.-G., Back, S.-H., Byun, S.-G. and Choi, E.-H. (2011) The production efficiency of cupped oyster Crassostrea gigas sprat according to clutch and growth comparing diploid and triploid oysters in off-bottom culture for tidal flat utilization. Korean Journal of Fisheries and Aquatic Sciences, 44(3): 259-266.
Lucas, A., Beninger, P.G. (1985) The use of physiological condition indices in marine bivalve aquaculture. Aquaculture, 44(3): 187-200.
NIFS (2012) Standard Manual of Pacific Oyster Hanging Culture. NIFS, 205pp.
NIFS (2016) Standard Manual of Pacific Oyster Culture. NIFS, 138pp.
NIFS (2020) Development of technology to improve productivity of single shell oyster using natural characteristics of west and south coastal waters. Annual Technical Report of NIFS, 132pp.
Mahon, G.A.T. (1983) Selection goals in oyster breeding. Aquaculture, 33(1-4): 141-148.
Mallet, A.L., Carve, C.E. and Hardy, M. (2009) The effect of floating bag management strategies on biofouling, oyster growth and biodeposition levels. Aquaculture, 287(3-4): 315-323.
Mizuta, D.D. and Wikfors, G.H. (2019) Seeking the perfect oyster shell: a brief review of current knowledge. Reviews in Aquaculture, 11(3): 586-602.
Nell, J.A. (2002) Farming triploid oysters. Aquaculture, 210(1-4): 69-88.
Park, M.-S., Do, Y.-H. and Rho, S.-W. (2018)Development direction of individual oyster aquaculture industry in Korea. The Journal of the Korean Society for Fisheries and Marine Sciences Education, 30(3): 913-922.
Quayle, D.B. (1988) Pacific oyster culture in British Columbia. Canadian Bulletin of Fisheries and Aquatic Sciences, 208: 241.
Ryan, F. (2008) A one day workshop to define oyster ‘condition’and to review the techniques available for its assessment. Australian Government's Cooperative Research Centres Programme, 775: 1-16.
Toba, D. (2002) Small-scale oyster farming for pleasure and profit in Washington. Washington Sea Grant, Seattle, WA.
Ward, R.D., Thompson, P.A., Appleyard, S.A., Swan, A.A. and Kube, P.D. (2005) Sustainable genetic improvement of Pacific oysters in Tasmania and South Australia. Fisheries Research and Development Corporation final report. Canberra, Australia.
Wilbur, K.M. and Saleuddin, A.S.M. (1983) Physiological energetics of marine molluscs. In; Wilbur, K. M. and Saleuddin, A.S.M. (Eds), The Mollusca. Academic Press, pp. 235-287.