DEVELOPMENT OF SEAWEED PROMOTING METHOD AND FEEDING SYSTEM TO SEAWEED-EATING ANIMALS USING BIODEGRADABLE MATERIAL IN BARREN GROUND

Abstract

 As one of the barren ground measures, seaweed bed recovery by the sea urchin eliminating is executed in various places.
 However, in the sea area where the feeding environment is bad, the gonad index of the sea urchin is low and there is no commercial value.
 In parallel with the measures of sea urchin's feeding damage against seaweed plumule, the feeding supply of the sea urchin becomes a problem.
 In this study, the examination of seaweed promoting method and feeding system to seaweed-eating animals are introduced. The seaweed cultivation ropes by biodegradable material was established. It keeps strength for seaweed plumule period, and seaweed grows up. It is deteriorated, it falls with seaweed, and food is supplied to the sea urchin. And the degradation characteristic of this rope is clarified.