Catch characteristics of shrimp trap by submerged time

Cast fishing gear needs some time for fishing progress, and catches and their composition by submerged timecan change by several cause. Therefore, it is very importance to study fishing capacity of fishing gear bysubmerged time. This study is to investigate catches and their composition of shrimp trap, that is used in thecoastal of the East Sea, and to find the fittest lifting time of trap. Experimental term are September 2006 andAugust 2007, the location is the coastal of Oho, Goseong, Gangwondo, Korea and one hundred trap is used ateach casting and lifting of gear. For convenience of description, survey of 2006 and 2007 are denoted asexperimental code 1 and 2, and submerged time 21hr, 43hr and 66hr are denoted as code A, B and C. Theresult of obtained from the above approach are summarized as follows: Many Northern shrimps(