Abstract
The present report deals with the relation between working conditions and the length of time for shooting
and hauling a midwater trawl or the walking activity of the respective crew members during this work, using the
records collected from a l,000 G. T. fishery training vessel in Nov. and Dec. of 1997 in the waters off the east
coast of Japan. Whether or not the time length and the walking activity were affected by the variables which may
affect them through the physical or psychological conditions of the crew members, was examined by estimating
multipule linear regression equations. The obtained equations indicated that 1) The time length for shooting the
trawl depended on the probable length of the time for confirmation of the net mouth being safely opened and
that for hauling depended on the length of the warps. These time lengths could not be free from the influence of
the working conditions, through the activity of the crew members invoIved. 2) The equations for the walking
activity of the respective members during this work included some variables the probable influence of which was
through the conditions of the crew members. 3) The estimated equations suggested that the actually adopted
explanation variables had a relation to the allotted charge on board.
