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Fishing power, which means performance of fishing vessel or catchability of fishing gear, can explain usingby fishing power index(FPI) to compare fishery efficiency among uniformity types of fishery that workduring the fixed period in specific fishing ground. This research analyzed on their fishing power andcatchability using comparing each sampled vessels of coastal trap fishery for common octopus. The resultsshowed that they were no difference in amount of used trap and immersed time etc. in CPUE amongsampled vessels, and had no correlation of catch production due to vessels tonnage. Most vessels FPIestimates but 3 vessels were higher than the averaged, and showed similar fishing power in general. Andthen, CPUE and FPI showed that 4 to 5 tonnage vessels would be superior to another, 4 tonnage vessels hadalso good catchability. Therefore, we estimated that 4 tonnage vessels had the most efficiency work forcoastal trap fishery for common octopus.Key words : Fishing power index, CPUE, Catchability, Trap fishery, Common octopus

Assessment of fishing power of common octopus (Octopus minor) trap fishery