• Proceedings of the Korean Aquaculture Society Conference
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• 2004.05a
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• pp.451-452
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• 2004

• Proceedings of the Korean Aquaculture Society Conference
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• 2002.08a
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• pp.201-202
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• 2002

• Journal of Aquaculture
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• v.3 no.1
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• pp.31-37
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• 1990

Ten strains of tilapiine species from genus Oreochromis were cytogenetically studied for genetic stock identification. Both the chromosome numbers(2n=44) were identical in all 10 strains. Heteromorphic sex chromosome pair were not found in any strains. Nuclear volumes vary between O. niloticus(21.0 $\mu$ $m^3$) and O. aureus(22.4 $\mu$ $m^3$)

• Journal of the Korean Society of Marine Environment & Safety
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• v.10 no.2 s.21
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• pp.55-60
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• 2004

As GNP increases, many peoples need the seafood with high quality. In Korea, aquaculture is one of major incomes for fishing households and records $50.6\%$ of total incomes for domestic fishery. The loss of aquaculture farm due to thievery at sea increases every year. In this research, we propose the system model for development of radar surveillance system, which protects aquaculture farms. For the proposed system, general requirements are described Our system is cost-effective when it is applied to domestic fishing households.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.237-238
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• 2000

전복양식산업은90년대 이후 비약적으로 발전하여 현재는 남해안을 중심으로 전국적으로 넙치양식과 함께 육상수조 및 해상양식에서 큰 비중을 차지하고 있다. 1999년도의 양식현황은 종묘생산 건수가 177건, 수면적 6만7천$m^2$, 연간 생산능력 5천5백만 마리로 나타나고 있으며, 지역별 생산 능력은 남해안 및 제주도가 전국대비 각각 62%, 5.9%, 동해안은 6.3%, 서해안은 25.4%를 차지하고 있다. 이처럼 전복양식 산업의 꾸준한 발달과 규모의 증가 추세로 인하여 전복 종묘에서부터 성패까지 성장 단계별로 선별. 분산기회가 많아지고, 성패의 출하시기에도 많은 양의 박리가 이루어지기 때문에 효율적이고 경제적인 박리방법이 필요하다. 특히, 일시에 대량으로 마취 박리를 할 수 있고, 생물에 대한 상처로 인한 폐사를 줄일 수 있는 안정적이고 효율적인 마취박리 방법이 절실히 요구되고 있다. (중략)

• Journal of Gifted/Talented Education
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• v.22 no.1
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• pp.39-59
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• 2012

This study has two purposes: The first is to compare gifted with non-gifted about learning styles and examine differences in the preference of learning styles between group characteristics depending on gender. The second is to examine differences between gifted and non-gifted about the preference of learning styles. The participants were 152 students from the middle schools in A City. 76 students of them belonged to the gifted group and the rest were non-gifted group. LSDI Learning Styles Diagnostic Inventory has been employed as measurement tools. Besides descriptive statistics, ANOVA, ${\chi}^2$ analysis were used to measure items. The results from data analysis are as follows. First, there was difference in learning styles between gifted and non-gifted. Second, there was not difference in the preference of learning styles between groups depending on the gender. Finally, this study discussed the results and their implication, the direction of future research in understanding and interpreting of learning styles for their practical usages.

• Proceedings of the Korean Aquaculture Society Conference
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• 2004.05a
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• pp.335-336
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• 2004

• Proceedings of the Korean Aquaculture Society Conference
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• 2004.05a
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• pp.72-74
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• 2004

• Korean Journal of Fisheries and Aquatic Sciences
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• v.13 no.2
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• pp.45-56
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• 1980

Farming density of oyster cultured in Hansan-Geoje Bay was studied to obtain the optimal farming density based on the biosedimentation analysis and the annual yield data from 1970 to 1979. Farming density of oyster extrapolated by means of pollution grade of sediment is significantly correlated to COD and phaeophytin content of the bottom mud of the bay. Pollution grade is linearly related to the number of oyster clusters suspended in the unit area. Optimal farming density was $0.12\;string/m^2$ in case of raft culture, and it was $0.12\;string/m^2$ in case of long-line culture. Farming density was well expressed by the number of strings per raft and the area covered by a raft. As strings per raft increased from 350 to 558, total yield from a raft increased and when occupied sea area per raft ranged from $1.000\;m^2\;to\;6,000\;m^2$, the yield per raft linearly increased as the area increased. This analysis suggests that the optimal density be 0.11 string per unit area $(m^2)$. As increasing the number of strings per $m^2$ the yield per string decreases, and this is well dipicted by a linear function. At this time the yield per unit area increases when the number of string increases up to the density of $0.13\;strings/m^2$. From the point of these three comprehensive analyses the optimal density was $0.11\~0.13\;string/m^2$ in case of raft culture and $0.25\;strings/m^2$ in case of long-line culture in Hansan-Geoje Bay. The maximum expected yield of oyster in Hansan-Geoje Bay is approximately 5,600 tons when maintained the string density at $0.11\~0.13\;string/m^2$.

• The Korean Journal of Malacology
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• v.23 no.1
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• pp.25-30
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• 2007

In order to estimate the ecological parameters of the population, short-necked clams, Ruditapes philippinarum, were collected from Jindu coast at Hansan Island, from April to December in 2005. The growth of the clam was estimated by von Bertalanffy growth model and each parameters were obtained from a nonlinear regression as $L_{\infty}\;=\;48.8\;mm$, k = 0.28 and $t_0\;=\;-0.88\;(R^2\;=\;0.994)$. Instantaneous coefficient of total mortality (Z) and fishing mortality (F) was calculated to be 0.8614/yr. and 0.6122/yr, respectively. The age at the first capture was estimated to be 2.88 year. Using the present parameter for clam fishing, the yield-per recruit (Y/R) was estimated to be 3.44g. Although the maximum Y/R was obtained under the parameters ($t_c\;=\;3.48\;yr$. and F = 0.9295/yr), it is favorable to maintain the current fishing effort considering the annual fluctuation of the parameters.