Efect of The Different Fishing Technique of Trammelnet and Lunarday on catch

Abstract

Trammelnet is the most appropriate gear in Indonesian shrimp fisheries after trawling banned era. However, productivity of trammelnet is still small compared with of trawl. To increase productivity, it is important to seek the suitable fishing time and techniques by doing experimental fishing in a lunardate cicle involved two fishing techniquest, i.e. passive and active operation. Experimental fishing were conducted using two trmmelnet units consisting of ten pieces net of the same design and construction. One unit was operated in passive technique, whereas the other was done actively, during the night for one month. There are 28 trips done successfully. To show the effects of different technique, of lunardate, and of piece position, the related catch data were analyzed separately and the result presented in the forms of table or graphic. The catches weight obtained from active technique were higher than passive technique. There is a tendency that nearer the piece to the boat, the higher the catch in active technique, which was not in passive technique, which was not in passive technique, where the seemed constant in amount by piece position. These revealed that te increasing swept area of piece toward boat significantly effecting the catches amounts. Light intensity in the third quarter apparently was the most suitable condition for trammelnet operation.