Effects of different operation time and shape of octopus bubu on the total catch of octopus (Octopus cyanea)

Abstract

Traditionally, Cymbiola nobilis snail shell was used for trapping octopus, Octopus cyanea. However, the abundance of snail had declined and thus the shell used for trapping the O. cyanea should imperatively be replaced with other materials. To understand the effects of materials, shape and operation time of the O. cyanea bubu on the number of catches, a research has been conducted in Kuala Tanjung Indah Village, Batubara Regency, North Sumatra Province, Indonesia. This research found that there was no significantly different in the number of O. cyanea caught for each trap shapes (7-9 specimens day-1). Contrarily, there was a different number of caught during the morning and afternoon periods. These findings showed that the number of O. cyanea caught was not affected by the material and the shape of the traps, but probably it was affected by the operational time.