ISSN : 1225-3480
In order to investigate the density effect on growth performance and cultural production in tidal flat rack oyster farm, in November 2012, oysters were kept in PE bag (0.5 × 1.0 m, mesh size10 mm) at four densities: 25, 50, 75 and 100 ea/bag. The density effect on growth was only observed after the outbreak of summer mortality, which resulted in significant decrease in the growth of high density group. To minimize the effect of summer mortality, the second experiment was carried out in March 2013 at five densities: 25, 50, 75, 100 and 200 ea/bag. Being no significant mortality, significant suppression of growth in shell length and total weight but not in fatness and meat weight at 200 ea/bag. In any case, if being stocked by oysters in 40-50 mm shell length, a commercial size oyster can harvest with 6-8 months but not at 200 ea/bag. Being achieved 7.23 kg/bag at 200 ea/bag, regression analysis suggested that the optimal density was 150 ea/bag for maximum biomass production. This finding suggested a strategic approach for stocking densities: 100 ea/bag for maximum individual growth and 150 ea/bag for maximum biomass production.
Cho, C.H. (1979) Mass mortalitys of oyster due to red tide in Jinhae Bay in 1978. Korean Journal of Fisheries and Aquatic Sciences, 12: 27-33.
Cho, S.-M. (2013) Food availability of oyster farms in Woongdo, Seosan in the western coast of Korea during summer. The Korean Journal of Malacology, 29: 283-289.
Cho, S.-M., and Jeong, W.-G. (2005) Spawning impact on lysosomal stability of the Pacific oyster, Crassostrea gigas. Aquaculture, 244: 383-387.
Choi, S.D., and Kim, S.Y. (1999) Mass mortality of oyster, Crassostrea gigas in Kamak Bay. II. Fouling organisms and flatworms. Journal of Research Institute of Industrial Technology and Regional Development, 8: 120-125.
Choi, S.D., Kim, S.Y., Yang, M.H., Park, J.S., Rha, S.J., Woo, C.Y., Kim, D.Y., and Jung, D.S. (1999) Mass mortality of oyster, Crassostrea gigas in Kamak Bay. I. Environmental factors of oyster farming area. Journal of Research Institute of Industrial Technology and Regional Development, 8: 259-266.
Chun, S.-K. (1970) Studies on the oyster diseases 1. Pathogenetic Investigation. Korean Journal of Fisheries and Aquatic Sciences, 3: 7-18.
Fréchette, M., and Bourget, E. (1985) Food-limited growth of Mytilus edulis L. in relation to the benthic boundary layer. Canadian Journal of Fisheries and Aquatic Sciences, 42: 1166-1170.
Hadley, N.H., and Manzi, J.J. (1984) Growth of seed clams, Mercenaria mercenaria, at various densities in a commercial scale nursery system. Aquaculture, 36:369-378.
Han, H.S., and Cho, S.-M. (2013) Study on optimal condition for oyster rack culture in terms of tidal exposure and rack height in Wando Coast, Korea. The Korean Journal of Malacol., 29: 43-50.
Han, J.C., Jo, Q., Park, Y.C., Park, T.G., Lee, D.C., and Cho, K.-C. (2013) A report on the mass summer mortalities of the farmed Pacific oysters, Crassostrea gigas and Bay scallops Argopecten irradians in the local waters of Goseong Bay, Korea. The Korean Journal of Malacology, 29: 239-244.
Harvey, M., and Vincent, B. (1991) Spatial variability of length-specific production in shell, somatic tissue and sexual products of Macoma balthica in the Lower St. Lawrence Estuary. I. Small and meso scale variability. Marine ecology progress series. Oldendorf, 75: 55-66.
Honkoop, P.J.C., and Bayne, B.L. (2002) Stocking density and growth of the Pacific oyster (Crassostrea gigas) and the Sydney rock oyster (Saccostrea glomerata) in Port Stephens, Australia. Aquaculture, 213: 171-186.
Jeong, W.-G. and Cho, S.-M. (2020) Growth comparison of the Pacific Oyster, Crassostrea gigas, between different stocking times into tidal flat rack culture system. The Korean Journal of Malacology, 36:111-116
Lim, D.-I., Kang, M.-R., Jang, P.-G., Kim, S.-Y., Jung, H.-S., Kang, Y.-S., and Kang, Y.-S. (2008) Water quality characteristics along mid-western coastal area of Korea. Ocean and Polar Research, 30: 379-399.
Mann, R., Burreson, E.M., and Baker, P.K. (1991) The decline of the Virginia oyster fishery in Chesapeake Bay considerations for introduction of a non-endemic species, Crassostrea gigas (Thunberg, 1793). Journal of Shellfish Research, 10: 379.
Mo, K.-H., Park, Y.-J., Jung, E.-Y., Kim, Y.-G., Jeong, C.-H., and Han, K.-N. (2012) Comparisons of growth and mortality of the tidal flat oyster Crassostrea gigas by the net bag rack culture system in two districts in western Korea. The Korean Journal of Malacology, 28: 45-54.
Rico-Villa, B., Pouvreau, S., and Robert, R. (2009)Influence of food density and temperature on ingestion, growth and settlement of Pacific oyster larvae, Crassostrea gigas. Aquaculture, 287: 395-401.
Park, S.-W., Kim, Y., Kim, J.-H., Chung, S.-W., and Han, K.-N. (2013) Effect of environment factors on growth and mortality of Cupped Oyster, Crassostrea gigas. The Korean Journal of Malacology, 29:273-281.
Vincent, B., Joly, D., and Harvey, M. (1994) Spatial variation in growth of the bivalve Macoma balthica (L.) on a tidal flat: effects of environmental factors and intraspecific competition. Journal of Experimental Marine Biology and Ecology, 181:223-238.
