CAPTURING CHARACTERISTICS ON DAYTIME JIGG ING OPERATION FOR LARGE-SIZE NEON FLYING SQUID OMMASTREPHES BARTRAMI WITH UNDERWATER FISHING LIGHT

Experimental daytime jigging operation was conducted to develop the op timum fishing technology, instead of drift net fishery, for large-size neon flying squid in the North Pacific Ocean. Using underwater fishin g light set at a depth of 180 m, the only target species was caught at depths of 240 m-300 m. The observation of capturing characteristics a nd echo images with a fish finder indicated that the squid made their sparse school with a small number of the individuals. Besides this way of jigging seems to provide useful information to determine the fishi ng position and to make an effective start for the evening operation.