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The Effects of the Spat Planting Time and Environmental Factors in the Arkshell, Scapharca broughtonii Schrenck Culture  

Kim, Jeong-Bae (South Sea Fisheries Research Institute, NFRDI)
Lee, Sang-Yong (South Sea Fisheries Research Institute, NFRDI)
Jung, Choon-Goo (South Sea Fisheries Research Institute, NFRDI)
Jung, Chang-Su (South Sea Fisheries Research Institute, NFRDI)
Son, Sang-Gyu (West Sea Fisheries Research Institute, NFRDI)
Publication Information
Journal of Aquaculture / v.20, no.1, 2007 , pp. 31-40 More about this Journal
Abstract
To find out the effect of the spat planting time and environmental factors in the arkshell, Scapharca broughtonii (Schrenck), we investigated the growth, survival rate of arkshell and habitat characteristics in Gamak Bay, Yeoja Bay and Saryang Island. We planted artificial spats of arkshell in Gamak Bay and Yeoja Bay at November 2004, and also planted domestic and Chinese natural spats in Saryang Island at March 2005. We measured growth, survival rate of arkshell, physiochemical parameters of the water mass (water temperature, salinity, dissolved oxygen, nutrients and chlorophyll a) and characteristics of the sediment (oxygen penetration depth, oxygen microprofiles, ignition loss and chemical oxygen demand) by monthly. The cumulative survival ratio of arkshell in Gamak Bay was the highest at December, whereas the ratio of arkshell in Yeoja Bay was recorded as 0% at October. The monthly growth rates of arkshell length in Gamak Bay and Yeoja Bay were the highest in May and the growth rate of the Korean arkshell in Saryang Island was higher than Chinese ones significantly. The high mortality (> 65%) of the arkshell in Yeoja Bay during summer probably caused by high water temperature, inflow of low salinity water, and low dissolved oxygen concentration in sediment. The concentrations of nutrient and sediment COD were considered to play an important role in the monthly survival ratio of arkshell in Gamak Bay and Sarayng Island. We suggest that the growth and mortality of arkshell might be influenced to the planting time of spat and the habitat characteristics.
Keywords
Arkshell; Scapharca broughtonii; Survival rate; Growth; Mortality; Habitat characteristics;
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Times Cited By KSCI : 3  (Citation Analysis)
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