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http://dx.doi.org/10.3796/KSFT.2014.50.1.083

Analysis on operating efficiency of shell divider using the principle of the lever for the purple sea urchin, Anthocidaris crassispina  

Park, Young-Seok (Resources Researches Institute, Jeju Special Self-Governing Provence)
Kim, Byung-Yeob (Dep't of Marine Industrial and Maritime Police, College of ocean science, Jeju national university)
Lee, Chang-Heon (Dep't of Marine Industrial and Maritime Police, College of ocean science, Jeju national university)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.50, no.1, 2014 , pp. 83-88 More about this Journal
Abstract
A new shell divider was manufactured according to the principle of the lever in order to improve working efficiency in collecting the gonad of Sea Urchin, Anthocidaris crassispina, around the coast of jeju. It was composed of three parts of a pair of handles for grasping power, a fulcrum and a pair of knives for action with 21cm in length and 13cm in width. The operating efficiency of the shell divider was tested out in three place of Jeju coast. Statistical significances of differences of working time between test groups were calculated according to the t-test with the level of significance. In dividing the shell of sea urchin, the average of about 3 seconds of working time by the shell divider was less than that by a knife. At the result of t-test, the statistical significance in the working time existed between the divider group and the knife group. On the other hand, the working time among the divider operators showed no significant differences. It is concluded that the shell divider is more efficient than a knife in traditional operating.
Keywords
Shell divider; Purple sea urchin; The principle of the lever; Working efficiency;
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Times Cited By KSCI : 3  (Citation Analysis)
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